Em mới tập tọe sắm bộ 5.1 nên cứ làm bộ AM-16 cho nó dễ chơi. Mà em thấy loa Mỹ nghe hay hơn loa Nhật các bác nhỉ@ Cái thằng Bose này bass của nó ra khiếp quá, chỉnh LPE toàn phải để dưới nửa thì mới đỡ rung chuyển sàn nhà, các loại trung & cao âm mới có cơ hội sống sót. :lol: :lol: :lol: . Phòng ngủ nhà em cũng chỉ 20m2. Em không có kinh nghiệm phối ghép nên cứ mua loa complex, mua loa rời em cứ sợ cứ loay hoay ghép nối mãi mà chúng chẳng hiểu nhau, không hát cùng giọng với nhau thì chán chết các bác nhỉ.
Vâng, không có kinh nghiệm thì cứ chơi full speakers set cho nó an toàn. AM-16 tiếng hay lắm, nhất là nhạc dance. Rất nhiều quán cafe hoặc billiards ở nước ngoài dùng bộ loa này. Vừa chơi billiards vừa nhún nhảy, thích lắm. Thế AVR của bác là gì thế. Bác setup thế nào?
Em thấy loa bose ghép với mấy em amply chạy mosfet cho chất âm khá hay, em đã thử với Kenwood và Marantz chạy mosfet rồi. Rất ấn tượng trong tầm giá.
hôm vừa rồi em có đôi bose 4.2 loa xịn các bác ah! em bán 5triệu có bác đến khuân luôn , bán xong rồi thấy người cứ ngẩn ngơ như mất tiền ý...
Wow bác giống em quá, bán xong đôi bose đã gắn bó suốt mấy năm, thấy người cứ ngẩn ngơ. Đến giờ em vẫn còn nhớ là nó có một chút mùi đặc trưng riêng, rõ rệt hơn so với đôi tannoy của em bây giờ. Ngoài một số loại nhạc phù hợp, các dòng loa cột của Bose (401, 501, 601...) còn rất tuyệt vời cho loa Front của bộ giàn xem phim.
Bác muốn mua cặp này hàng xịn bây giờ thật khó đó. Em không dám đảm bảo với bác hàng bán ở siêu thị là xin đâu,toàn hàng dỏm không à,hàng xịn đã lâu rồi không nhập nữa đâu,vì em có quen nhiều nhân viên bán ở các siêu thị điện máy. Ngoài chợ Nhật Tảo cũng hay có đời loa này lắm đó. Bác nên nhờ ai có kinh nghiệm về loa nhờ đi mua cùng. không thì khó phân biệt hàng xịn với hàng dỏm lắm,chỉ có nghe thử mới biết thôi. Chúc bác tìm được loa như ý.
Tôi thấy nhiều audiophile có thành kiến với loa BOSE. đây là 1 sai lầm. Loa BOSE series 901 đưa tên tuổi BOSE lên hàng lãnh đạo với số lượng tiêu thụ ầm ầm, ao` ao`, ít có thương hiệu nào sánh kịp, mặc dù giá không rẻ trên dưới 1000 USD(18 triệu)/ cặp. Tôi xin chia sẻ 1 tí kinh nghiêm. về loa BOSE 901. Nếu bác nào thích chơi fullrange, vừa rẻ vừa sướng cái lỗ tai không bị nhức đầu khi tìm ampli phối ghép. Kiếm 1 cặp BOSE 901 series I đến series II thôi nhe', cũ và bẩn, quan trọng phải RẺ, tháo ra lấy củ loa (18 củ), thế là các bác có thể làm được 9 cặp loa fullrange. Không cần phân tầng ( crossover ) lỉnh kỉnh. Quan trọng là thùng phải đóng thật tốt kiểu loa nén (Acoustic suspension) không cần to, kích thước khoảng 20cm X 20cm X 20cm là OK rồi. nếu không biết đóng, thì nhờ mấy bác chuyên đóng thùng loa giải quyết dùm. Điểm quan trọng là thùng loa phải thật kín (air tight sealed) giống AR. Bảo đảm mặc dù mỗi thùng chỉ 1 củ loa be bé fullrange. Nhưng chất lượng âm thanh đánh chết nhiều anh to xác gấp 4,5 lần như Pioneer, Sansui, Celestion, Kef, B&W .. Điều quan trọng khi tìm mua loa 901 series 1, II là các củ loa phải còn Zin, núm loa có chữ BOSE, vành loa bằng vải. loại này nó bền kinh khủng, âm thanh ngọt ngào, dải tầng rộng. Các bác sẽ rất ngạc nhiên và đầy tự tin khi đem đôi loa còi DIY của mình đi dự thi hàng Bookshelves speaker....Nhỏ nhỏ mà có võ :lol: Thân. Xem hình đính kèm (không bán, xin miễn hỏi :lol: )
Em không biết là Bose dùng fullrange drivers đấy. Thế thì hay quá nhỉ. Khi nào kiếm em Bose cũ bẩn nào DIY chơi . Mà bác cho em hỏi là hai cái drivers của Bose đó trị số là bao nhiêu Ohms ạ? Thanks bác
đọc tít bác giật em thấy cái quan niêm đó nó sai hoàn toàn bác ạ . chỉ có dân audio vn mình mới có cách nghĩ đó thôi .ở nước ngoài như đức chẳng hạn dòng loa này đươc mọi người chơi rất nhiều . xe hơi cũng phải hạng khá mới được lắp bộ âm thanh của bose .kính bác
đồng ý với cáic bác này về 601 chứ chưa nói đến 701, audiophile nói riêng ở Vina ta em thấy gout của các bác chủ yếu là jazz, blue, acoutist, sẽ có các lưa chọn loa khác tối ưu hơn bose, cá nhân em nếu nhận xét về mặt âm thanh thì bose vẫn là một đẳng cấp
Nghe các bác bàn về 301,601,701,901.. nhưng khg thấy nói đến 501 V.Bác nào dùng rồi cho e xin vài dòng nhận xét ạ
Các bác nghe thử đôi 601 đi rồi sẽ thay đổi cách nhìn về loa BOSE nghe nhạc. Chúc các bác khỏe,[/quote] đồng ý với cáic bác này về 601 chứ chưa nói đến 701, audiophile nói riêng ở Vina ta em thấy gout của các bác chủ yếu là jazz, blue, acoutist, sẽ có các lưa chọn loa khác tối ưu hơn bose, cá nhân em nếu nhận xét về mặt âm thanh thì bose vẫn là một đẳng cấp[/quote] 701 không hay bằng 601 nhé bác. Giá cũng thua xa bác ah. Thân,
__________ Biết thì nhiều anh em đều biết. Nhưng chắc ít ai dám giới thiệu cho bác, vì loại loa trắng be bé (white cube) 90% là hàng giả. Khó kiếm hàng thật. Nếu bác ở Sài Gòn, thì ghé show room trong thương xá Eden, góc Đồng Khởi và Lê Lợi. Cửa hàng tên gì tôi không nhớ. Nhưng họ chỉ bán nguyên bộ dàn thôi. Chúc may mắn.
Có 1 bác ở quận 6 chuyên bán các loại Bose, trong nhà có, ngoài trời có, bả là hàng sách tay về, thỉnh thoảng vẫn thấy rao trên 5giay, nhung khong biết được sách ở nước nào về??? :lol:
Lang thang em tìm thấy cái này khá thuyết phục gửi các bác đọc chơi. Công nhận bác này nói thẳng thiệt! Nguồn: http://www.intellexual.net/bose.html INTRO: As a part of a growing sect of audio enthusiasts who detest the Bose Corporation for its cheap manufacturing practices, archaic engineering concepts and deceptive marketing campaigns, I recently came across a rare kind of website written by a "Bose-o-phile" who spent considerable effort defending the company from what people across the audiophile community have known from the beginning. Upon reading his site, I took it upon myself to shed some light on the matter. However, having very little first-hand knowledge about the products besides what I've heard in demo rooms, I took it upon myself to audition the Bose AM-15 and perform a little "surgery" on them while I was at it. The review on this page is directed towards the Acoustimass-15, one of Bose's most popular systems, and holds truth to the entire Acoustimass and Lifestyle series of products as well. After all the Lifestyle system is merely the Bose Acoustimass speakers packaged with a Bose integrated preamp. The AM-15 is priced at US$1299.99 MSRP. When you are done reading, check out my Bose alternatives page here. THE CUBES: The $1300 Bose Acoustimass system implements five dual-cubed, 2.5-inch, paper-cone satellite speakers (incidentally you can buy these exact same drivers for $35 a pair here). The material that is used to build these speakers may seem adequate to the unassuming novice; However, upon closer inspection, it becomes clear that they are built with little regard for performance. For starters the cubes are made of what Bose once claimed to be "revolutionary new space-aged paper" when my own observations lead me to believe that they are nothing more than dyed Manila hemp. Paper grade is beside the point here as all large paper drivers have poor resonant properties in upper octave frequencies (2 KHz to 20+ KHz). When designing satellite speakers where size is the primary consideration, a conventional dome tweeter would perform much better than a cone tweeter. However Bose disregards this fact because the cost of making paper cone tweeters is much cheaper. You find this practice abundant in $200 Aiwa boom boxes and mini-systems by the way. There is also something to be said about the diameter of the drivers. The 2.5-inch paper cone Bose uses falls into the range where conventional tweeter and midrange drivers perform weakest. This incongruous selection of dual 2.5-inch drivers is plagued with substantial shortcomings in the high and mid-frequency range. Remember that sound is merely the rapid movement of air so there are very specific driver sizes that correspond to the acoustic properties which allow for the magnet-coil structure to drive the speaker at its targeted frequency band with greater ease. In home applications, high-pass tweeters are normally between 0.5 to 1 inch in diameter, and never more than 2 inches. Larger tweeters are especially poor performers when underpowered by tiny magnets such as those used in the Bose system. The unusually large size of the Bose drivers creates a substantial frequency response limitation in the highs at 13 KHz. Midrange drivers should never be smaller than 3 inches in diameter, and are commonly 3 to 6.5 inches (ideally over 4 inches). The application of a 2.5 inch midrange driver creates another substantial limitation, this time in the mid-bass response. The smaller the driver, the less surface area on the cone--and thus the more excursion that is required to push the same amount of air need to produce the same audible sound. Thus with a 2.5 inch driver the physical excursion of the cone would have to be tremendous in order to perform like a standard 6-inch midrange. Unfortunately the Bose drivers do not possess this supernatural excursion ability, so the midbass drops off at 280 Hz. Another one of the system's major flaws is the fact that it relies on one small driver to reproduce high and midrange frequencies together. I am of course referring to the satellite cubes again, which are forced to reproduce signal from 200 Hz to 20 KHz. You may argue that there are two speakers in each satellite, but there is also no active crossover separating the signal so both are driving the same frequency bands. In this type of speaker design, it is essential to use large cabinets and a line array to get any midbass due to the small radiating area and low X-max. But instead Bose tries to combine two imcompatible sound principles giving you the worst properties of both. Though they are entirely capable of doing so, no other consumer-market speaker company even considers building these pre-equalized miniature dual-driver "crossover-less" satellites because the resulting performance is evident in the sound produced (or rather not produced). However this isn't some major oversight in Bose's R&D team. This system was designed to be small, aesthetically appealing and achieve high wife-acceptance factor (WAF), and so this product is the outcome of those goals. If high and midrange frequencies each had their own discrete drivers with high quality crossovers, Bose would have the same speaker package as every other competitor on the market--except without remotely similar performance and thus nothing to market. The cube satellites are also enclosed in cheap, thin plastic cabinets, which presents yet another weakness from an acoustic standpoint. The purpose of a speaker cabinet is to provide an inert barrier that absorbs sound, dampens resonance and prevents various levels of distortion and cancellation. The thin plastic enclosures that Bose uses are very light and resonant and thus fail at its primary purpose. When you push the speakers hard you can actually feel the entire enclosure resonating with it. This is the signature of a poor design. In addition the cube enclosures also fail at magnetically sealing the drivers so that it not only gives off electromagnetic interference (EMI), but also receives it with little resistance. With the price Bose is charging for all its speaker products, you could be paying for real wood or real veneer medium-density fiberboard (MDF) cabinets from other companies. THE SUBWOOFER: The Bose Acoustimass subwoofer, or "Bass Module" as it's called, consists of three 5.5-inch drivers in a seventh-order band pass configuration. The three-chamber band pass design is the worst of all major subwoofer enclosure types. Its only purpose is to boost the decibel output of its components at the expense of accuracy. It does this by burying all the woofers within the cabinet in three separate chambers and using them to drive air out of its port or ports. First of all, 5.5-inch drivers are not designed to be used as bass drivers; they are commonly used as midrange drivers. In fact Bose doesn't even claim that its "Bass Module" is in fact a subwoofer. True subwoofers start at 8 inches in diameter and taper off at 15 inches. Size selection depends largely on the application. Smaller subwoofers move faster and thus have tighter bass response for improved clarity and accuracy, but larger subwoofers can reproduce lower frequencies and at louder volumes. Build quality, crossovers, amps, and driver design can magnify or nullify these traits. At a glance, you can tell the 5.5-inch Bose woofers are poorly designed from the questionable cone material to the frail spiders coupled with cheap crossovers which are located near the amplifier section (distortion anyone?). This contrived effort quickly reveals its weaknesses in a computer frequency sweep test. Build quality. None of the three woofers Bose employs has adequate driver bracing. This is yet another crucial aspect of a speaker's design that Bose misses the mark on. The spider supporting the cone is flimsy considering the excursion required from such a small woofer. This invariably translates to loose and sloppy response and even a doubling effect at high volumes! What's worse is the fact that the woofers are accommodated with foam surrounds. The surround is a flexible membrane that is used to attach the speaker cone to the baffle. Organic foam surrounds are known for drying out and rotting away within about 10-15 years of its manufacturing. Today foam is reserved as a cheap substitute used in low-end speakers where low cost is the emphasis. Well-established alternatives to foam include flexible rubber compounds such as Butyl, Santaprene, Supronyl, and other polymers. This leaves no excuse for Bose because all of their expensive speakers--from the base models to the flagship models--use foam. I also noticed that the three Bose subwoofer drivers are made of the same type of paper as the satellites, but of a slightly thicker species. Treated paper, paper-composite, and multi-layered laminate make for excellent woofer/subwoofer cones. In fact epoxy-treated paper tends to have the highest strength-to-density ratio, which yields some of the tightest bass response and highest definition of any of the subwoofers I've heard. They are also immune to heat breakdown. Velodyne and REL for instance, are two companies that implement treated paper with great success; However, Bose uses raw untreated paper that does not possess near the quality of treated paper. Untreated paper falls highly susceptible to moisture damage, which will alter the resonant frequency, compromise integrity, and eventually cause the cone to buckle or tear under load. Trendier woofers use more exotic materials that are unaffected by moisture such as Kevlar, carbon fiber, carbon-Kevlar composites, Aero gel, aluminum, and an assortment of poly plastics. While on the subject of its structural integrity, the Acoustimass subwoofer is housed in the lowest-grade particle board negotiable. It is a cheap, thin low-density fiberboard (LDF) that is a fraction of the industry's standard medium-density fiberboard's (MDF) density and thickness. Every other speaker company employs nothing less than MDF in their subwoofer cabinets because it is three times denser than LDF. A general rule of thumb is that the MDF be at least 3/4 inches thick with more thickness emphasized on the front baffle. High fidelty speaker companies that I've worked for commonly use 1.5 inch thick solid MDF for cabinets. The Acoustimass bass module uses LDF in two plies totalling 1/2 inch thick and 1/3 the density. Combining offset cabinet material in vertical plies, like Bose does, is also a very poor shortcut to using laser cutting machines. The optimal cabinet material should of course be heavy, stiff, and solid. Two-ply LDF is not heavy, it is not stiff, and it is not solid. Other speaker companies that Bose markets its products as being on the same level as use marble, methacrylate polymer, solid oak, or solid cast aluminum enclosures (ie: Wilson Audio, nOrh, Revel). A pretty reliable gauge of the workmanship on a speaker is in the type of input panels/wire terminals that are built in. All high quality speakers and amplifiers use five-way binding posts. The significance of this is in the higher cost attributed with better build, lower occurence of breakage, improved contact and conductivity, the ability to accept thicker gauge speaker wire, and the compatibility with banana plugs, spade lugs, angle pins, and a host of other wire terminators. Despite the fact that pretty much all other speaker companies have picked up the binding post a decade ago, Bose continues to use the inferior spring-loaded speaker clip in all their speakers and amplifiers. Speaker clips made for popular interfaces back in the 80's, but nowadays they exist only as a cheaper substitute used to cut back on costs. If you want to know what speaker clips look like, check out the back side of any mini-system in the price range of $80-up (Aiwa, JVC). If you want to know what binding posts look like, look on the back of a mini-system in the price range of $400-up (Denon, Yamaha). Taking that into account one begins to see what kind of production quality Bose aligns itself with. THE COLD HARD NUMBERS (PART ONE): Unlike other speaker manufacturers, Bose refuses to publish any frequency response charts or distortion data on their products (and for a good reason). Thus a few independent audiophiles, industry professionals, and newsgroups have taken it upon themselves to benchmark the much debated Acoustimass system. Here is a pretty credible one sourced from the August 1999 issue of Sound and Vision magazine... SATELLITES BASS MODULE Frequency Response 280 Hz to 13.3k Hz at ±10.5 dB 46Hz to 202Hz at ±2.3 dB Sensitivity (SPL at 1 meter)* 85.1 dB N/A Impedance (minimum/nominal) 5.3/8 ohms N/A Bass Limits (-3/-6 dB) 280/220 Hz 46/40 Hz * measured with 2.8 volts of pink-noise input To reiterate the above, the Acoustimass's bass module responds to 46 Hz to 202 Hz at ±2.3 dB, while the satellites respond to 280 Hz to 13.3 KHz at ±10.5 dB. This is, by the way, the only speaker that I have ever seen tested with a ±10.5 db allowance. Still, this leaves a frequency gap between the satellites and bass module of about 80 Hz! That is 80 hertz of sound that is completely erased within the system's internal crossovers! I wonder how Bose figured out which 80 hertz matters least in the audible spectrum? I will say though that this gap accounts for a huge loss in midrange sound, which is responsible for the majority contralto, baritone, and tenor vocals in music, and many sound effects in home theater. And let us not forget that the Acoustimass system also ignores audible signal from 20Hz to 45Hz on the low end (deep bass), and 13KHz to 20KHz on the high end (high treble). Do the math folks, this Bose system only produces 13,176 of the 19,980 Hertz in the audible sound spectrum. That's roughly 66% of the actual recording being played back to you! Is this the kind of performance you'd expect from a $1300 product? Most speakers in the same price range are able to respond from 15 Hz to 25 Khz and all modern media formats from vinyl to DVD record these frequencies as well. Though the peak frequencies are those that most humans can not hear, the pressure produced from 15 Hz and 25 KHz frequencies can be detected physiologically and will in fact have an affect on the harmonics of the music you listen to. So why does this "industry-leading" Bose company only produce about 52% of the sound of it's equal-priced market competitors? Good question... Not only will you missing out on a considerable amount of sound with Bose, but the fact that the subwoofer has to respond to frequencies as high as 280 Hz means that there will be extreme amounts of localized midbass in the Bass Module. A well-mated subwoofer should never have to produce any frequencies above 80 Hz and ideally should be crossed over around 60-70 Hz. The purpose of a subwoofer is to produce non-directional low frequency effects. So essentially when you're watching movies with a Bose system, you will hear the gunshots and explosions coming from the subwoofer in the corner of the room, and NOT from the sound imaged television screen. In music, you will hear the singer's voice come from the subwoofer next to the CD rack in the corner of the room, and not the converging point of the two main speakers. This is known as extremely poor 'sound imaging'. For you current Bose owners, try unplugging all your cubed satellite speakers and play a DVD on your Acoustimass system. I used the DVD 'X-Men' for my review. You will be able to follow the entire movie off of dialogue picked up by your Bose Bass Module alone. All this lacking of sonic fidelity and richness is doctored up by placing overemphasis and accentuation on 80 Hz and 200 Hz in the bass module to give the illusion of powerful bass, and by placing the same accentuation on 7 Hz in the satellites to give the false impression of full high-frequency coverage. In the quest for high fidelity and accuracy in sound reproduction, this system is antithetical to the goal. As illustrated below, there is almost nothing linear about the Bose frequency response... NOTE: HERTZ ARE NOT EVENLY MARKED OFF ABOVE: Data gathered by S&V from an anechoic frequency sweep test of the Acoustimass-15 unit. Remember that the goal here is to achieve linear response. You want a frequency chart to show as flat a line as possible, which illustrates accuracy and linear sound reproduction without colorization. It is true that sound is perceived logarithmically by the human ear, but this should have no influence on a speaker's reproduction and interpretation of signal because a speaker should faithfully reproduce what the microphones captured when they recorded the source material you are listening to. Notice the high end roll-off at sub-20kHz frequencies at the far right and the extreme colorization from 1 kHz to 20kHz with huge emphasis on 5 - 7kHz. There is also a frequency dip between 200 Hz - 300Hz within ±3dB. The deep bass rolls off prematurely at around 50Hz and is spiked with colorization at about 200Hz. The bass module and satellites don't even begin to harmonize until beyond -10dB. Remember the representation of accurate sound reproduction on the above graph would be a flat line across the ±0dB mark. Just look how miserably Bose stacks up in that regard... BELOW: Another thing to consider is that the only relevant information on the graph is the measurement between -3dB to +3dB because 3 decibels is the slightest detectable change from zero to the human ear. I've isolated that window of scale below. This is how the AcoustiMass looks from that standpoint... THE COLD HARD NUMBERS (PART TWO): Bose has a "product data sheet" as they like to call it, on their website in Adobe Acrobat PDF-format, which can be viewed by clicking here. If and when you look at this document, you will soon realize that absolutely no where are there any specifications for the system's actual performance; Merely product size, dimensions, and shipping weight. There is mention of the AM-15 being quote: "Compatible with all surround receivers 10 - 200 watts per channel/rated 4 to 8 ohms". Good to know, except that just about every speaker system sold on the consumer market today is quote "Compatible with all surround receivers 10 - 200 watts per channel/rated 4 to 8 ohms"? So then what has Bose just told us? Absolutely nothing. This is how Bose gets away with telling us nothing about the speaker system's actual performance. What they don't tell you is that because the satellite speakers and bass module are sooo incredibly small, that they are also incredibly inefficient due to lack of internal cabinet air space. This is why the Acoustimass system runs at an unadvertised 6-ohm nominal load, which will put more load on your amplifier than the more common 8-ohm speakers of the competition. Yes your nice expensive receiver you just bought is going to run a few degrees hotter than you expected in order to push the Bose cubes just as loud as a regular satellite speaker. Especially if you bought the Acoustimass with the passive Bass Module. And while the impedance difference is slight, it does create more heat than an 8-ohm speaker would, and heat is ALWAYS an enemy of the amplifier. BUT I HEAR BOSE IS GOOD!: Popularity. Popularity of a name brand doesn't equate to quality. Bose mystique feeds off of its well-targeted audience: the ignorant, ill-informed, mass-market consumers who search for simplified hifi audio solutions in "all-in-one" chain stores such as Walmart, Best Buy, Sam's Club, Price Costco, Sears, Montgomery Wards, etc. A Bose speaker, when put up against the in-store competition of Technics, Cerwin Vega, Pioneer, Kenwood, and Sony speakers, may indeed sound like a better buy. Since these Japanese mega-icons are established corporate monsters, the buyer will feel confident knowing that he or she made a thorough comparison with other household brand names. The truth is that generally the companies that make the best electronics, tend to make the worst speakers. Their mass-production business models of cheap labor, overseas assembly, nonexistant QA, and focus on bottom line spending leaves little room for the integral psychoacoustic research required for designing an outstanding speaker. I would estimate that the vast majority of current Bose owners are the victims of miseducation or a complete lack of audio education, and a false belief that they own the best speakers on the market. A small minority will buy Bose for the actual sound quality knowing full well that they are paying more for a badge than for performance. The size factor by itself should be a non-issue since Polk, Gallo, and others have already made smaller speakers than Bose for less the price and equally big sound. A simple way to test this theory is to see just how familiar a Bose owner is with the real industry leading brands, like Klipsch, Paradigm, Definitive Technology, and B&W. "What's that? I've never heard of that no-name brand." Audio newbies often throw out the "But I heard that Bose is good!" defense, to which I respond "From who?" Was it a sound engineer, electrical engineer, materials scientist, studio engineer, sound producer, recording professional, musician, Mark Levinson? Ray Dolby? George Lucas? Anyone credible? Or was it your neighbor with the GoldStar walkman, Teac boom box, Funai mini-system, and Sylvania receiver? Perhaps the ubiquitous Bose Ads that they find in completely irrelevant magazines such as Popular Science, Times, Playboy, GQ, People, Astronomy, etc, had some sort of subliminal effect against the better of their judgment? But that's just conjecture... FAIR LISTENING: In all stores that sell Bose, you will see one of two types of Bose displays. First, there is the more common 'end-cap display' with a small TV screen, neatly laid out Bose components with speakers and extended steel arms that reach around to create a surround environment. In this setup, the trick to making the Bose system sound good is in unfair comparison and unrealistic environment. In most of these low-end stores, no other 5.1 surround system is configured in such a way because the store does not have a dedicated listening room. Therefore the experience of listening to Bose is more fulfilling than hearing the other 5.1 speaker systems that are all lined up in a row on the shelf-top facing you. The Acoustimass displays are also only about six feet around, therefore when you're listening to the Bose demo in the pocket, the speakers will most likely sound powerful from three feet away. You put the same system in your average 20 by 20 foot living room and in order to fill that airspace with the same sound pressure level, the AM-15s will audibly distort in numerous frequency bands. Bose also carefully selects music and movie sequences that flatter their speakers and most effectively utilize its built-in accents. And as a former employee of two of the top five largest hifi audio specialty retailers in the United States, I personally know how stubborn Bose is about not allowing their speakers to participate in fair speaker comparisons in listening rooms. I know how Bose reps require that a store's floor plan has to place Acoustimass/LifeStyle systems in separate areas with their own displays far away from other speakers. The second breed of Bose displays is the 'expo room'. These are placed in stores that are deeply in cahoots with Bose Corp. These are stores like Fry's Electronics that lease out 2000 square feet of showroom floor for Bose to erect their own specially designed theater room and an attached catalog room. The thing with these show rooms and theaters is that they are very heavily sound treated with acoustic sound padding, and are acoustically engineered, calibrated rooms. The control room behind the theater is operated by a $30,000 rack of professional-grade preamplifiers, equalizers, DSP processors, and amplifiers. The technical prowess and build quality of this rack system compared to the Bose Lifestyle media console is a night and day difference. The subwoofer used is positioned in the optimal location to maximize spatial loading. The room dimensions are also calculated to reduce standing waves. The expense of running a room like this is in the hundreds of thousands of dollars range. Again this is a gross overstatement of the Acoustimass' true capabilities, presented in an impractical, unrealistic environment. I can almost fully guarantee you that the Acoustimass system that consumers buy will not sound the same as they do in this room, unless they build an identical room themselves. If you don't believe me, then on your next visit to this Bose demo kindly ask the Bose spokesperson to show you their control room. They will be reluctant and steadfast to do so. Some will deny such a control room exists. Simple, just trace the wires back to the source. I would also be interested in dissecting the speakers and subwoofer they use in this room to see if they matched that of the Acoustimass system that they sell to consumers. My guess is they are likely modified versions as well. A third species is the Bose outlet store. Well this one is a no-brainer: they only carry Bose products so what do you have to reference any product from? Bose, Bosier, and Bosiest? There really is no way to gauge the performance or quality of anything in these stores since they all fell from the same apple tree. Not to mention the salespeople in the outlet stores are Bose employees trained under the same highly effective sales-marketing techniques that brought their underperformaing products to such a high level of success. Finally, it is useful to know that in comparison tests, psychologically the listener is more attracted to the speaker systems that have more emphasized bass and treble, and less midrange-- a fault of pop/rock sound engineers. This is the wrong approach, as it is the goal of every audiophile to find the most balanced, most accurate sound. If you do decide to shop around for the Acoustimass system, point your attention to the bass module. On it, there are tone controls (bass and treble dials), which control the tonal saturation of the speakers. It is standard practice by every audiophile to neutralize tone settings. So neutralize the dials on the subwoofer and listen to how terribly dry and lifeless the entire system sounds with music. What's worse, turn the tone settings all the down to the base setting and the system sounds anemic. Only when the settings for bass and treble are completely saturated will the speakers sound healthy. MARKETING AND BOSE: It is estimated that Bose has spent more dollars on advertising last year than ALL other high-end companies COMBINED. Does it have an effect? Sadly, yes. A few years back, the United States Air Force signed Bose onto a multi-million-dollar contract to design noise cancellation headsets for Air Force flight crews. Bose won the contract over two other companies simply because of their "more established name" (brand recognition). The concept of a noise cancellation headset is to actively monitor the noise frequencies emitted from a jet engine and the turbulent wind, and reproduce the exact signal 180 degrees out of phase, thus theoretically canceling it out completely. Many reputable manufacturers have successful done so as well. Bose produced a model that cost approximately $1000 per unit, which failed to cancel out a significant amount of noise. The company used the contract as an opportunity to unload obsolete parts from years back. Bose pawned off thousands of outdated interface connectors for which there were no longer commercially available mating jacks, and incorporated them into the headsets. The Air Force, proud as it was, didn't scrap the project, but instead spent countless millions more replacing the consoles in a number of aircraft to make them compatible with the said headsets. In the end though, the Air Force did terminate the contract when test crews found that the headsets were ineffective and non-durable. This whole mess was created over a brand name's alleged reputation and prestige. Bose is now selling a downgraded version of these headsets to commercial airlines and to the consumer public. They now work to a minor degree, but are not surprisingly still easily outperformed by their competitors. These consumer market headsets are also very, very poorly crafted. I browse many online audio forums and have heard stories about these very expensive headsets falling apart prematurely. Few magazines are now willing to give honest reviews of Bose products due to a Consumer Reports review a few years back that gave the AM-15 embarrassingly bad ratings (score of 62 out of 100). Consumer Reports allegedly used a double-blind comparison test, which is in fact the ideal way to compare speakers. That particular review ended up in a lawsuit over "unscientific testing methods". Thankfully, Bose lost that lawsuit, but since then, Consumer Reports and various other magazines give neutral-to-rave reviews that tip-toe around the actual sound quality and focus more on ergonomics and style. More prestigious publications like Fi and What HiFi? ignore Bose products completely. BOSE AND THE PATENT SYSTEM: To quote from Michael Wong, a visitor to this site: "...a casual perusal of their website reveals that they have used money and lawyers to repeatedly abuse the patent system. They have patents for the Acoutimass (Helmholtz resonator), the Direct/Reflecting technology (multipolar speakers), their Acoustic Waveguide (transmission line), and their JewelCube technology (amalgam of transmission line and other old ideas). In each and every case, their patent is a joke; an obvious example of the all-too-common trick of making one minor alteration upon a pre-existing idea and then using an army of lawyers to get it patented... And why all the bother? Because it looks good to write "patented technology" on the box...". For a company that emphasizes cutting-edge research so much, I'm curious as to why their flagship 901 speakers have not seen any signigicant mechanical changes in the last 15 years. Where is the "better sound through research" going? GOT THX?: Considering the large emphasis on marketing that Bose places on its products as well as the ostentatious boasting of "innovation" and "performance", I am curious as to why none, count them: ZERO, of their speakers are THX-certified. George Lucas offers certification to any product from any company willing to undergo the scrutiny of his tests. I'm sure Dr. Amar Bose has brought in many Bose speakers to the Skywalker Ranch for certification only to have them rejected time and time again. I am no fan of THX-Certification myself; However, no one can deny that it is perhaps the singly most powerful marketing tool in the entire industry. One tool that Dr. Bose would not have overlooked, but again, one that he could not obtain for himself. THE ALTERNATIVES: In the industry, "BOSE" is considered an acronym for "Buy Other Sound Equipment". So in that spirit, I have made it quite simple to shop for an outstanding home theater system using the same $1300 that Bose charges. I've been getting a lot of emails and guestbook entries requesting my opinion and advise on specific system designs. I am unable to answer all of them though I do read them all and try to answer as many as possible, but it would be much easier if you shopped and auditioned speakers based on the list I've compiled. Again, my opinion on the quote on quote "best speakers" cannot be relied on, nor can anyone else's. Since sound is a subjective quality, no one can answer that question but you. If in fact you are blessed with the inability to decifer Bose speakers from other premium brand speakers, then all the more power to you! I am not trying to promote or upsell you something fancier, nor am I here to play favorites. I'm merely suggesting superior alternatives to the Bose Acoustimass for the same price or less. > Surround Sound Speakers List < THE BOTTOM LINE: This six-speaker unit costs $1299.99 USD MSRP. From dissecting it, I can tell you it costs $100, no more than $150 tops, to assemble. It performs similarly to a $500 Optimus-Radio Shack surround sound system and is very easily outperformed by a $350 Cambridge Soundworks system. For $1300, there are at least three dozen other configurations from companies such as KEF, PSB, NHT, Mission, Tannoy, Diva, Polk, B&W, Energy, Paradigm, M&K, Infinity, Mirage, Monitor, Jamo, Axiom, nOrh, Anthony Gallo, Dahlquist, Sound Dynamics, Acoustic Research, Phase Technology, Definitive Technology, Wharfdale, Boston Acoustics, and Klipsch that easily outperform all Bose speakers from the 151s to the 901s. If you are in the market for such a surround sound system, I have compiled an extensive list of speaker systems for you to peruse. Just click here. Bose equipment, even the flagship LifeStyle 50, resembles the sonic performance of the 11-year-old Aiwa minisystem in my garage. For $500, the Wave Radio is an overpriced alarm clock. If you're impressed by it, have a listen to a Henry Kloss radio for a fraction of the price! For $1000, the Bose 3-2-1 can not be described as anything less than a crime against sound reproduction. The message I want everyone to take from this lengthy review is that Bose, like Bang & Olufsen and Nakamichi, sell lifestyle and designer products whose prices are very heavily saturated by image and appeal. They are by no means, no means at all performance products. They have no cost-effectiveness, no bang-for-the-buck value, and draw no respect from any true audio enthusiests. If your goal is to appeal to and impress housewives, then this system gets the job done, but if your goal is high fidelity, high performance, high endurance, upgradeability, and fair market value pricing then I would very highly suggest you look elsewhere. I am by no means an elitist audiophile who touts golden ears about in gross snobbery. I am an audiophile in its purest and most basic form: one who is enthusiastic about high fidelity sound reproduction, which I think we all are to some degree. I've worked in hifi audio/video retail sales before (for two companies that offered Bose), worked on the manufaturing end, and have designed and personally installed home theaters for hundreds of clients of very diverse needs. I have no affiliation or financial ties to any competing speaker companies so I speak out of objectivity and out of a big-brotherly desire to inform those that don't already share my knowledge and experiences. Armed with this knowledge, you are now a more powerful consumer. So on that note, good luck and happy hunting! FURTHER READING: The internet is a great place. There are many growing online communities and discussion forums focused on home theater, home audio, and consumer electronics. These are great places for everyone, from the eager learning novice to the die-hard audiophile, to exchange ideas and experiences with each other. If you would like to learn more on the subject of audio equipment or just need some guidance, here are some of the leading web forums out there (in no particular order)... # Home Theater Forum - a good Bose discussion # AV Science Forum - another good Bose discussion # Audioholics.com Forums # AudioReview.com Forums # AudioAsylum.com Forums # Home Theater Spot Forums # AV Forums # The Outlaw Saloon # Klipsch Bulletin Board # Sound & Vison Online Forums # Club Polk Forums # The DVD Forums
tôi mua dàn loa bose 401 + 161, vcs 10, 101MM dùng để xem phimn + nghe nhạc, theo các bác có hợp lý không
đây là bài đã dịch, và đánh giá về loa bose AM 15 link: http://translate.google.com.vn/translat ... rmd%3Divns
Cứ yên tâm mà chơi Bose các bác ah. Bên Tây có seller còn so sánh Bose 901 với Wilson Sophia 2 nữa là FOR SALE: One pair of Wilson Sophia Series2 speakers. These are demos in the store. Reviews on this model are available on the Wilson website. As you probably already know, this is one of the must highly reviewed speakers ever made. Wilson speakers are all about dynamics and resolution of detail. Anyone upgrading from Bose 901s is in for a shock! http://cgi.audiogon.com/cgi-bin/auc.pl? ... 1293700279
công nghệ Reflex của bose ( phụ thuộc phần lớn bởi yếu tố thùng loa, vị trí sắp đặt củ loa trên thùng... ) + độ nhạy loa bose ko cao ( 89db ) là hai lý do chủ yếu để các bác thích D.I.Y ko bao giờ suy nghĩ đến loa bose bose 901 được D.I.Y khi và chỉ khi ...mất hộp cross
