bose 901 series iv speakers manual
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bose 901 series iv speakers manualLearn more or change settings here. Just type your request belowQuick tip: Try searching for just one or two words (e.g., connection help). Click here for more information on the types of cookies we use and how to change your cookie settings. Just type your request belowQuick tip: Try searching for just one or two words (e.g., connection help). Scored a pair of series 3.I refoamed all 18 drivers bought a EQ on eBay sent it in for re-cap and upgrade then hooked them up to Pioneer SX 1250.Ha ha heaven. Reviewed Nov 21st, 2018 by Artfrobadoo My buddy has a pair of supposedly original 901s which I have suspicions of being fakes. The wood does not match. There is no labeling. The terminals are crude. He thinks they are the cats meow. So I searched craigslist and I found a pair of 901s for 200 dollars. Then the guy throws in a beautiful working Kenwood KA 7300 amp. I like my Bose 301's better then these 901 VI. Perhaps it's the amp I have the associated speakers to what. Reviewed Nov 02nd, 2018 by OzDaddyBear I have 901 series VI and there i a plug between left and right termina, there is nothing in the manual to advise what this is fot. Any ideas?l Reviewed Jun 12th, 2018 by Mrsteve I have owned two pair of these. The first pair a series IV, the Second pair a Series VI. I took advantage of the Bose Trade-in program some years ago when they still offered it. There are several companies that offer the drivers, and replacing them for both pair is around 560.00-Plus the time involved.I need to do a repair on the equalizer. I cannot find the Series III Service Manual. Thanks To be use for PA system or Karaoke. Any suggestion for an appropriate mixer. I'm looking for resources to help me troubleshoot and repair the equalizer. I don't have much experience, but I would like to learn, and this seems like a fun project. If anyone is willing to help break things down as simple as is convenient, or could help guide me in this process, I would be very grateful.https://firstnationsjobsonline.com/userfiles/bosch-maxx-wfl-2064-manual.xml
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We all have to start somewhere. I refurbished the speakers myself, and would like to say I did the same to the equalizer. Due to purchasing from a second hand store and not really knowing enough about them I consequently now own two right hand speakers. Not sure how this will affect the speakers. While it might well be quite possible to fix, I would be more interested in feeding the speakers from another signal source. The cable from the preamp connects to the speakers via a five-pin 180 degrees DIN plug, and so I think it should be quite possible to connect to some other signal source, the same way I have used a pair of Philips MFB speakers. Am I right or am I right. Anyone have any experience of the 901p active speakers. Or of other Bose Lifestyle 20 substitutes for them? No need to attend a live concert anymore. With Two Pair in the proper positions you've got your own live performance! To purchase 901 spares or accessories, please contact the company via their website or visit an authorised retailer. This technology produces Stereo Everywhere performance with balanced sound everywhere in the room, rather than in a single sweet spot. The Acoustic Matrix enclosures house 9 full-range drivers with helically-wound aluminum voice coils to provide exceptional power handling capability, and dramatically reduce chamber noise to deliver well-defined bass. A separately-available active equalizer specifically engineered for the 901 speakers balances the output of all audio frequencies to deliver natural tonal balance and clarity. Stylish floorstanding pedestals are also available as a separate option. Let us know YOUR RECENTLY VIEWED ITEMS Browsing History ON Clear History Not responsible for typographical or illustrative errors. Consumer Electronics, If you follow any of those links and end up acquiring a manual, it will not be from us. Here is why we may deserve your business.http://dtysgs.com/uploads/20200828080655223.xml We love our Vintage Audio and other built-to-last electronics equipment in an age of disposable products for a throw-away society. We might sell the kids before our classic silver Pioneer or Vintage Marantz, Kenwood and Sansui gear. If you also value High Quality Manuals that enhance the ownership satisfaction of your vintage audio treasures, you found the right place. (continued below.) It IS Our Guiding Principle Add Site to your Favorites Other sites we host: Phase Linear History Vintage Technics Database We sponsor two free Yahoo Audio Groups We are meticulous and give genuine best efforts to produce clean, well-constructed manuals for you. A side-by-side comparison of our reproduction manuals with those from many other vendors will usually reveal an overall better appearance, construction, and print quality. Sometimes strikingly so. 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If interested, check out About Our Manuals and other site sections with the menu links at the top of all pages.https://www.thebiketube.com/acros-bosch-tankless-water-heater-2400es-ng-manual If you would like for us to be here in the future, you can help by telling your friends and by sharing links to our site in your discussion groups, forums, blogs and web sites.We have been slowly updating these manuals lists over the years. As time allows we will replace the spare Factory ORIGINAL Manuals Catalog section with the same page format as these here in the reproduction manuals section. We also have more than 400 Gigabytes of various manuals, schematics, brochures, etc in (mostly) PDF format. They number perhaps 400,000 files. Truth is that we may never get them listed on our site. But they are available. Click here for further PDF manuals informatiion. If an item has a description and Price Code, then CLICK THAT PRICE PRECISELY identify the item you want with company brand. If you want multiple Whether your email is to order Tell us EXACTLY You may findIndividually-assigned Overall quality is Normally folded Normally folded and mailed in ordinary business Includes equalizer voltage conversion instructions Overall quality is Very Good to Excellent. Overall quality is Very Good. Models covered: 901 Series IV. Overall quality is Very Good to Excellent. Overall quality is Very Good to Excellent. Supplement If an item has a description and Price Code, then CLICK THAT PRICE PRECISELY identify the item you want with company brand. If you want multiple Whether your email is to order Tell us EXACTLY You may findIndividually-assigned It makes a difference. Seekers of truth mayImages may be used with. Other than using a green sharpie to get better CD sound, or that guy that calls you on the phone and osmotically makes your system sound better, no greater myth exists in audio today than that of the Bose 901 speakers. Much like Bigfoot, have you even seen a pair of Bose 901 speakers or, better yet, heard them? My Fiat 500 Sport has a Bose sound system, and yes, it possesses admirable bass extension (so there!) and a wide stereo image from the driver’s seat.http://florentineholding.com/images/bose-901-series-iv-active-equalizer-manual.pdf I also experienced Bose on a recent trip home from Spain, where I sampled the new Burmester sound system in the latest Porsche 911 Cabriolet, and Porsche was kind enough to fly me home first class. The latter experience came with a pair of Bose Noise Canceling headphones (another product I’d never actually used, but about which I heard plenty of scuttlebutt). I’m thinking of investing in a pair before my next European trip. So that’s two strikes in Bose’s favor. My last memory of the speakers harkens back to a jazz club in my hometown of Milwaukee that actually had the speakers installed into the ceiling by their pedestal bases and powered by a Marantz 4300 quad receiver. Another area venue had their ceiling-mounted 901s powered by a large stack of McIntosh gear. Both systems were pleasant. Not to be outdone, another bar owner installed Magnepan MGIIs from the ceiling, which, coincidentally, ended up being destroyed by a ruckus started by the Milwaukee Rugby Club after a hearty victory. And so it goes. Sure, I love my Maggie 1.7s, but they don’t produce a lot of bass, either, and really need a lot of juice to give their best performance. And don’t even get me started on single-driver Lowthers. Been there, done that, too. Are you thinking mythbusting? Me too. I bought a random pair of 901s via the Web for retail price. I initially tried to contact Bose to see if we could get a review pair, but no one at the PR department would return my call. Hence, there will be less historical data accompanying the review, which is unfortunate, as the speaker is now on its sixth iteration of development and changed somewhat since its introduction in 1968. Unless we get a phone call, this will remain an unresolved question. If I must have a pair of 901s, I can special order them or go directly to the Web site. I do the latter, and about 90 seconds after getting to the home page, a pair of walnut 901s with pedestal bases is on its way.objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1626bcc882a896---case-580c-backhoe-parts-manual.pdf Six days later, the 901s arrive on my doorstep, safe and sound. Next, the listening begins. Will the speakers fall off their pedestals. Stay tuned for Part Two. An Eames lounge chair and an old copy Playboy is all that’s required for the full-on Austin Powers effect. Groovy, baby! However, using them with the metal bases requires wood screws. While the holes are predrilled, you probably won’t utilize them more than a couple times without causing permanent damage to the speaker base. I can’t imagine a company as large as Bose wouldn’t be able to add threaded inserts without raising cost. Yet if you are considering using your 901s with any kind of upgraded cable, don’t permanently attach the bases until you make a cable commitment. I employed Radio Shack’s 16-gauge speaker wire for the majority of listening sessions. The second involves the Sooloos Music Server feeding Wadia’s new 121 decoding computer to the Unison Research S6 vacuum-tube amplifier. At the very end of the sessions, the Pass Labs XA200.5 monoblocks were employed to see just how loud the 901s could play. Because the majority of the drivers face rearward, placement is the key to fine-tuning the imaging performance. If you are used to the sound of traditional box speakers, 901s—when tightly placed in room corners—sound much larger than life and boast an exaggerated soundstage. They feel like the remnants of a hallucinogenic experience. The 901s’ modest size encourages experimentation, which proves equally successful in my smaller 11 x 17-foot living room as well as in my 16 x 25-foot dedicated room. Placed about eight feet apart, eight feet from a couch, and about five feet out into the listening room appeared perfect, and allowed the sound from the front-firing driver to anchor the presentation. Exactly like every panel speaker I’ve used in the room, the 901s were much more interesting on the long wall. Traditionalists, before you cry foul, think of the popularity of DSP-based speakers these days. Bose achieves a similar, if less sophisticated and considerably less-expensive effect with a passive EQ. The manual states the EQ can be used with series V 901s, but earlier models require the proper box. The supplied pair of three-foot RCA patch cords gets the ball rolling. The EQ features a two-position button: position one offering a flatter response, and position two adding a slight bass bump, not unlike the loudness button on a 70s receiver. Finally, there are two sliding controls for mid-bass and mid-treble, the latter claiming the most control over the overall tonal balance. Fortunately, audio pack rat and contributor Jerold O’Brien still has a mint pair of MGIIs to which I listened for direct comparison. Sure enough, they enjoy a softer, more relaxed high-frequency response, just like the 901s. The current MMG we reviewed possesses a bit more treble extension than the original MGIIs, but does not throw as large a soundfield. And, both Magnepan models need a ton of power to get up and go. A suite of Joni Mitchell tunes from Court and Spark, Hissing of Summer Lawns, and Don Juan’s Reckless Daughter captures her voice in the same approximate place as it’s found in my reference system. Sampling a wide range of solo vocalists reveals the importance of the mid-treble slider. Push too much for treble brightness and the vocals become grainy—not unlike when adjusting toe-in with a conventional speaker. Ted Nugent’s “My Love is Like a Tire Iron” from Intensities in Ten Cities equates to an impressive experience when cranked to brain-damage levels. Nugent’s band is spread-out between and beyond the speaker boundaries, and never diminishes in intensity when I get up off the couch to grab another beer. These speakers rock. A quick listen to a handful of bass heavy tracks from Pink Floyd, Genesis and Yello proved highly convincing and again, way more powerful than a number of small stand mounted speakers that I’m very familiar with. Its incredibly wide dispersion comes in a close second. The Bose 901s sound great anywhere in the room, and what you might give up in terms of ultra-focused, sweet-spot listening, you’ll gain in spades when you have a room full of people. These could very well be one of the world’s three or four best party speakers. Again, compromise: Would you like a pair of speakers that you just listen to in your listening chair for private sessions, or do you do most of your listening in secondary mode while hanging out in the house cooking and entertaining? Precious few include components sporting any better quality. I’ve heard a handful of speakers that check a couple more audiophile boxes than the 901s, but I’ve heard many more that sound much worse. Much as I hate audiophile cliches, the “sins of omission” has never been truer than with these speakers. They are so smooth and musical, it’s tough to freak out about the missing detail. When the keyboard enters the first verse of Joni Mitchell’s “Trouble Child,” it’s subdued, as are the bongos at the beginning of “Jericho.” Again, I suspect information is lost in the EQ and through the stock cables. What the 901s sacrifice here, they make up for on a broader scale via the ability to play really loud and without strain. Turning up Ace Frehley’s “Genghis Khan” from Anomaly at a level that hits 100 db peaks proves effortless. Other than plasma tweeter designs, I’ve had my hands on almost everything over the past 35 years. Quad 57s are more beguiling through the midband, the MartinLogan speakers carry more extension at both ends of the frequency spectrum, and the Magepans lie somewhere in between. But they cost more and present greater challenges to a room and system. I found the most lifelike sound came via a configuration slightly counterintuitive to that suggested by the manual. Indeed, my audiophile buddies that I bribed into my listening room with IPAs are still shocked at just how good the 901s sound. As my wife likes to say, “What if Bigfoot is really a nice guy?” Consider this myth busted. But—and like Pee Wee Herman likes to say, “Everyone has a big but”—the 901 gets the essence of the music right. The crossoverless design does a fantastic job with pace, which is what always draws me to single-driver and full-range electrostatic designs. Add a better source and substitute a great tube integrated, and you’ll be shocked at the sheer musicality of the combination. Considering that this model is aimed more at the mass market than the audiophile, the 901s possess more than enough virtue to be considered an excellent value. They are certainly one of the most fun speakers I’ve had the pleasure to hear. Isn’t that what this is all supposed to be about? So forget all the folklore you’ve heard about the Bose 901s, these are serious speakers.But how do they respond to the usual tweaks applied by audiophile to practically every other speaker? For example, it’s very easy to note the variation between the Pioneer SX-424 and Cambridge 740 amplifier, as well as the distinction between tube and solid-state amplification. Again, just as a traditional speaker benefits, the 901s profit from solid speaker stands that are spiked at the bottom. The Sound Anchor stands also make it much easier to take advantage of upgraded speaker cable, as it must travel down the center of the Bose pedestals. Those planning on using audiophile-vetted cable will have to get handy with a large drill bit to modify the stands. There’s no way you can pair Nordost Odin speaker cable with the 901s and the stock pedestal stands. Don’t even think about it. My spirit of investigation encouraged this tact, but it was not my favorite position. There’s slightly more HF extension, but the big, expansive soundfield that makes the speaker so enticing simply disappears. These speakers have been a blast to listen to with every kind of music. While they yield decent performance with a low-budget receiver, they are worthy of journeyman-level components and a modest cable upgrade. Advanced hobbyists could probably uncover even more performance by modding the EQ’s passive components, but doing so is well beyond the scope of this review and definitely voids the warranty. Something went wrong. View cart for details. All Rights Reserved. User Agreement, Privacy, Cookies and AdChoice Norton Secured - powered by Verisign. Something went wrong. Looks like this page is missing. If you still need help, visit our help pages. All Rights Reserved. User Agreement, Privacy, Cookies and AdChoice Norton Secured - powered by Verisign. How you go about connecting the Bose 901-series equalizer to your stereo system varies slightly depending on whether you intend to use it in a two-speaker or surround sound setup. If you're using earlier 901 speakers, check for possible compatibility issues with the 901-series equalizer you're using before you begin. These devices might include tape decks and other equalization or signal processing devices. All jacks are located on the back of the Bose 901 equalizer. Connecting to a switched outlet ensures the equalizer is turned on or off automatically whenever the receiver or amplifier is turned on or off. Play some audio through the system and press the “Tape” or “Tape Monitor” button on your receiver. All sound should stop when this button is pressed. When it does, switch the “Monitor” button on the equalizer to the “Source” position. The audio should start playing again. If it doesn't, check your connections and try again. Consult the documentation that came with the receiver or amplifier for more information about which jacks to use when connecting an equalizer. The 901 Series VI active equalizer must not be used with 901 Series I, II, III or IV speakers. Something went wrong.Learn more - opens in a new window or tab Read item description or contact seller for postage options. This amount is subject to change until you make payment. For additional information, see the Global Shipping Program terms and conditions - opens in a new window or tab This amount is subject to change until you make payment. If you reside in an EU member state besides UK, import VAT on this purchase is not recoverable. 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The sale starts Friday, March 1 and runs through Sunday, March 3. It is being run by Great Estate. The Old Days Audiophile Bose Diy And Crafts Old Things Speakers Music Nostalgia Vintage P6274964 Bose 901 speaker, II series, circa 1972 Bose Eames Speakers Tulips Archive Audio Mid Century Storage Vintage VINTAGE BOSE 901 SPEAKERS EQUALIZER TULIP STANDS MID CENTURY MOD EAMES ERA Find best value and selection for your VINTAGE BOSE 901 SPEAKERS EQUALIZER TULIP STANDS MID CENTURY MOD EAMES ERA search on eBay. World's leading marketplace. Discover more of the best Bose, Industrial, 901, and Speaker inspiration on Designspiration Pinterest Explore Log in Sign up Privacy. Bose is known only using paper cone drivers pushed into unusually small boxes, never publishing frequency response specs, and suing Consumer Reports for giving them a bad review. Even though paper is a good material to use for speaker drivers, and plenty of audiophile companies don't publish specs, the perception is that Bose is overpriced junk. If you have a satellite speakers or a subwoofer, you can thank Bose for popularizing that form factor. If you enjoy a high quality factory car stereo, you can thank Bose for that as well. They were installing EQ'ed Class D active speaker modules in the doors of Cadillac's back in 1984. Bose was doing research using Dummy heads and figuring out head related transfer functions in the 70's that laid the ground work for headphone and VR breakthroughs that are happening now. As for the argument that their gear is overpriced, I've heard much worse for much more. Profits from Bose smart manufacturing, not corner cutting, has funded research that shaped much of today's the audio landscape. This is the speaker that back in 1968 proved commercial viability of omnidirectional, dipole, and all sorts of bizarre dispersion patterns. This pair was made back in 1987 when Bose speakers were still made in America. The design has not changed since then, and honestly it's almost longer in the tooth than Klipsch Heritage speakers.The drivers also have the ugly looking tinsel leads on the front, but on the plus side the plastic baskets are branded three times along with the dust cap. These drivers are 1 ohm each, and are ganged up in such a way internally to produce an 8ohm load.The rear grills are a molded metal mesh and the clip to cover the back drivers. The rear grill also works to cut the treble response from the rear drivers. If you try running these speakers without the rear grills expect shrillness on a scale that should not exist in the natural world.The port tube design is something I've never seen duplicated, it makes for a very deep tuning without much physical volume. The downside is that these ports can put a candle out from 6 feet away and are audible at full chuff.It's a pretty stout box if you account for all of the holes in it.The idea is that you hook up your wire and thread it through the speaker stands. Then, unless you want to put wood screws into your speakers to attach the stands, you are in for a chore. The dance of flipping the speaker while trying to hold the stand onto the bottom is a contortion that only the 901 owners can understand.This iconic design is really beautiful, if not the most functional. The wire is supposed to run through the top and out of the bottom, but there is no notch for it to slide under on the bottom. Instead the wire just kind of get smashed and the stand becomes slightly unbalanced.The blue line is for the default Bass EQ, the red line is for the secondary bass setting. Yes, that is a shit ton of treble boost, as well as a healthy chunk of bass boost.Choose up to 15dB variation in the treble tone, and 10dB to the mid-bass. I took over the living room and pushed my main speakers into the corner. I ended up at 16 inches from the rear wall and pushed them a bit wider than my main speakers to give them as much room as possible to operate. Now in a perfect world these would have an uninterrupted wall behind them and closer to corners, but I don't have that option so the right channel is stuck on the hallway side. Originally the 901's were to be setup mostly at ear level when seated. The setup for the past 30 years has been tied to these short stands, or hung from the ceiling far off axis. There is even a recommendation for matching pairs of floor and ceiling 901's in some manuals, something I'm sure a few die hards have tried. I'll break it down the performance of the speaker into a few standard categories and how they perform in comparison to other options out there. After initial placement I never once felt like I needed to move the speakers to get more out of them. Imaging is huge and involved, but it is hard at least in my setup to place or pick out specific elements of the music. There is no denying the 901's ability to make you hear all of the music, but because the image is such a blur I don't seem to notice it as much as directional speakers, it instead you get the feeling of it. In contrast, Linkwitz dipole speakers create a soup of sound spread around the room, where the 901's transform the walls into massive speakers.These are some of the loudest speakers I've used in the 200Hz-10kHz range. Setup outside I was able to blast 112dB of non distorted music out of the back of the speakers measured from 10 feet away. The front was limited to about 98dB, which is still pretty damn loud for outdoors. I can see why there is a version of these speakers for PA use. When you start to get above 95dB the bass response falls off as the little drivers can't play deep bass at high volumes. This can also lead to them falling apart before 95dB on complicated tracks that are also bass heavy. For instance most Chemical brothers tracks are limited to about 85dB just because the full range drivers just can't do everything at once.If you sit and listen critically you will be met with harsh treble and bloated bass. Adjusting the EQ to fix these problems will leave the speakers sounding dull as it turns down all of the treble when the worst problems in the cone breakup range above 5k. Bass response is harder to nail down, it's hard to get away from the muddy bass, and honestly the Bass EQ options seem limited to either bloated bass or no bass.Some simple instrumental tracks sound good, but anything with female vocals or cymbals should be avoided. These speakers can be used in a party scenario, and will impress most drunk people with the quantity of sound they produce.My neighbors had to deal with 95dB sine sweeps for 3 hours straight, and then pink noise for another hour. I think you will find the results are totally worth it though.This the most quiet axis of the speaker, so it's not as important as other measurements, but this is definitely not a good start. We are seeing bass response down into the 30's and a jagged sloping response to the treble and a massive 7kHz peak. The jagged response is probably due to baffle reflections, and comb filtering from the 9 drivers all doing the same thing.It's damn near impossible to make out what is happening here, but generally the response gets much louder as you move around the back of the speaker.On the bottom we have the front power response, this is an average of 0-60 degrees. On the top we are looking at the rear power response, an average from 120-180 degrees. Yes, the rear is about 10dB louder, than the front.It's an average of all of the off axis measurements, or the total power response of the speakers, and it's flat. Normally a power response would be tilted to show a roll off of the treble, but it's hard to say that it's wrong given the strange dispersion pattern. Maybe this was the intended goal of the speaker, or maybe it's just a coincidence.This measurement was taken slightly above the axis of the speaker to better represent the suggested listening height. The red measurement is with the speaker 12 inches from the back wall, and the blue one is 18 inches. These are very similar, with the 12 inch being a little nicer. Also, note that the 7k peak is not hidden by the boundary, rear speaker interaction, or even being off axis vertically.I continued on like this until, finally I ended up cutting everything a little. While it definitely sounds better, the correction is far from perfect due to the inherent irregularity of the speakers response.