bose 901 series v equalizer service manual
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bose 901 series v equalizer service manualConsumer 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. 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. Our Customer Comments page is a fraction of what we receive from real customers and electronics technicians. The vast majority of our printed reproduction manuals are Very Good to Excellent on our Guaranteed Quality Ratings scale. But every single item is not and we refuse to give a false impression that they are. We want you to see a detailed description and individually-assigned quality rating before you purchase. This time-consuming extra service is almost never provided by our competitors. Customer complaints are nearly zero, perhaps one per 500-1000 sales. We believe that virtually none of our competitors could truthfully make a similar claim. We are a USA based family business operating old-school style. That means real people trying to serve you as if we were a walk-in store in your local neighborhood. We always combine shipping on multiple-item orders and do not rip you off on shipping charges.http://allwinind.com/bosch-maxx-wfl-2260-manual.xml
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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. 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. 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.http://conblocmanado.com/pics/bosch-maxx-wfl-2260-manual-free.xml 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. 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.http://superbia.lgbt/flotaganis/1649439847 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. All rights reserved. Bose, Acoustimass, Lifestyle, Personal and Wave are registered trademarks of Bose Corporation. Please fill out the information section on the card and mail it to Bose Corporation. Customer service For additional help in solving problems, contact Bose customer service. See the inside back cover for Bose customer service offices and phone numbers. The installation and operating principles of this system are significantly different from those of conventional speakers. To obtain the best possible performance and avoid problems, please take the time to read this guide. Using different components may require different connection methods. More information is available by calling Bose Corporation.Figure 2 Pedestal (A) and ceiling mount. Do not drill completely through the cabinet. Note: Contact Bose for more information on suspending speakers. For details on your specific ceiling construction, consult a qualified building contractor or professional installer. Choosing the wire It is important to use the right thickness of speaker wire. For distances of up to 30 feet (9 m), 18 gauge (.075 mm ) 2-conductor wire works well. Call Bose Corporation for assistance with the connection of additional speakers or signal processing equipment. Refer to the address information inside the back cover of this guide. Note: To use an external signal processor, or to add a graphic equalizer, contact Bose for more information. Refer to the inside back cover of this guide. When connected to TAPE MONITOR Press your receiver TAPE MONITOR button to the IN or MONITOR position. It may also be used with 901 Series V speakers.https://www.figlitornatialpadre.com/images/bose-901-series-iii-owner-s-manual.pdf WARNING: Bose 901 Series I, II, III, or IV speakers require a substantially different equalization.Bose Corporation will make every effort to remedy any problem within the terms of the warranty. Or call Bose directly (see inside back cover for phone numbers). Please do not offer the downloaded file for sell only use it for personal usage. Looking for other manual? For this no need registration. May be help you to repair. You could suffer a fatal electrical shock. Instead, contact your nearest service center. Note! To open downloaded files you need acrobat reader or similar pdf reader program. In addition, Also some files are djvu so you need djvu viewer to open them. These free programs can be found on this page: needed progs If you use opera you have to disable opera turbo function to download file. If you cannot download this file, try it with CHROME or FIREFOX browser. Translate this page: Relevant AUDIO forum topics: Bose Sounddock 1 tapegyseg csati Sziasztok. Egy baratom megkert, hogy talaljak vagy gyartsak egy tapegyseget a Bose dokkolojahoz. Sajnos az eredetiket aranyarban adjak, igy gyartanom kell egyet. Talatam is egy elegans kis 4 pines csatit, de fennakadtam az eredeti csatlakozo labkiosztasan. Talaltam egy rajzot de nem tudom eldonteni, hogy a kabelen levot abrazolja, vagy a dokkoloban levot. Basszus vegfoka 2-3mp mulva megfut vagy pozitivba vagy negativba ha nincs a hangszoro rarakva, hangszoroval azonnal letilt, (amikor a kimeneten eljut DC 4V-ig a vedelem lekapcsolja relevel az erositot).joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1626bccd7d549c---compaq-ipaq-cp-2w-manual.pdf Mikor a MUTE hibat kerestem, volt olyan eset is, hogy nem futott meg a kimenet es szolt a basszus rendesen, de ujboli bekapcsolaskor ha nem halkitottam le a potit akkor kikapcsolt a rele, ha lehalkitottam akkor jo lett, de nagyon susogott, arra hasonlitott mint amikor FM radio nincs az allomason, van egy kozos mute tranzisztor az kapcsolja az osszes tobbit, ha azt kiszedtem akkor is megmaradt a susogas, szerintem visszafele jott valamelyik oldalrol ezert szedtem ki mindegyik oldalrol a tranzisztorokat, nem akartam bajlodni vele, hogy honnet jon a susosgas vissza. Mi lehet a gond? BOSE bekotesi rajz Legyszi legyszi ha valaki tudnasegiteni egy BOSE AMP2440-as erosito bekoteseben,azt nagyon szepen megkoszonem. Ez AUDI A3-asbol van, a steker nincsmeg. Bose Lifestyle CD-20 FLC kijelzo halvany Sziasztok! A fenti keszuleknek halvany a kijelzese. Eleg erdekesen van megoldva a kijelzo tapfesze, sokban fugg a bejovo 12VAC feszultsegtol. Kerdesem az lenne, hogy a futest probaljam emelni, vagy a -24V-ot. A D8-on a 30V is kevesebb, de az AC 4.5V is. Melyik befolyasolja jobban a fenyerot. A futes, vagy a negativ tapfesz? Udv: Jacint Similar manuals: You can write in English language into the forum (not only in Hungarian). Something went wrong. View cart for details. All Rights Reserved. User Agreement, Privacy, Cookies and AdChoice Norton Secured - powered by Verisign. Something went wrong. View cart for details. All Rights Reserved. User Agreement, Privacy, Cookies and AdChoice Norton Secured - powered by Verisign. Discover everything Scribd has to offer, including books and audiobooks from major publishers. Start Free Trial Cancel anytime.Use only replacement parts that have critical characteristics recommended by the manufacturer. 2. Make leakage current or resistance measurements to determine that exposed parts are acceptably insulated from the supply circuit before returning the unit to the customer. Use the following checks to perform these measurements: A. W ith the unit AC switch first in the ON position, then in the OFF position, measure from a known earth ground (metal water pipe, conduit, etc.) to all exposed metal parts of the unit (antennas, handle bracket, metal cabinet, screw heads, metallic overlays, control shafts, etc.), especially any exposed metal parts that offer an electrical return path to the chassis. Any current measured must not exceed 0.5 milliamp. Reverse the unit power cord plug in the outlet and repeat test.When the exposed metallic part has a return path to the chassis, the reading should be between 1 and 5.2 Megohms. When there is no return path to the chassis, the reading must be “infinite”. If it is not within the limits specified, there is the possibility of a shock hazard, and the unit must be repaired and re- checked before it is returned to the customer. Browse Books Site Directory Site Language: English Change Language English Change Language. This one came in for a full overhaul, explained in photos: Most of the time this isn’t captured, but in this case I took some photos during the process to show just how performance verification works. For this test, I used the Keithley 2015 THD Multimeter’s internal low-distortion source. At 1 kHz, distortion should be below 0.09: With that, it’s ready to go home! Bookmark the permalink. Notify me of new posts via email. It may not display this or other websites correctly. You should upgrade or use an alternative browser. I managed to get the resistors in yesterday while my daughter was taking a nap. More pics as the build progresses. The guy I got the circuit board off specializes in restoring these EQs. On his web page, he showed some examples of components that test WAY out of spec, and not just capacitors either. The sad thing is, there are probably hundreds if not thousands of Bose 901 speakers not giving their best because the equalizer is still running on tired old components. And it's a shame, because I like the 901s, there are a lot of Bose haters out there, but it's a pretty remarkable design. Lee.For those that have a set of 901's without the BOSE equalizer, couldn't a 10 to 31 band stereo EQ be used to achieve similar results. BTW, considering how long some of these have been around, your equalizer built with modern components should sound a lot better Have three pairs of Bose 901's Series V and two pairs of Bose 802 Series II. P.S. as for the 'Active Equalizer(s)' well I sent all four back to the manufacture in South Carolina for a total refurb.Click to expand. There were recommended settings somewhere around, but I can't think it to be better than the oem so far as representing the sound as intended by the designers.Same guy? Anyways.a big difference was made.Maybe not better than using the BOSE EQ, but certainly better than without one at all, so at the least it seems like a good option for those that can't get their hands on the real deal.How do I contact themHow do I contact them Click to expand. Here is his link. You could then make as many as you wanted.Maybe not better than using the BOSE EQ, but certainly better than without one at all, so at the least it seems like a good option for those that can't get their hands on the real deal. Click to expand. And either the EQ is right, or it isn't. These units are different - and should be thought of differently - than outboard equalizers. They are really an intrinsic part of the speakers, no different - in a way - than the crossovers in conventional speakers. Having worked at the Bose factory, 901's are pretty much the only Bose product I have any respect for.Click to expand. Far as I know, Series I and II share an equalizer, Series III and IV share an equalizer, and V and VI share an equalizer. I put fresh electrolytic caps in my 901V equalizer, but I didn't do anything with the other caps, the silicon, or the resistors. Click to expand. It's a series 2 board by the way. Some of the values were very specific, like 39.2k for example. Bose specifies close tolerance resistors in key areas of the circuit, I went with 1 across the board. I also am replacing all of the signal path electrolytics with film caps. Lee.Far as I know, Series I and II share an equalizer, Series III and IV share an equalizer, and V and VI share an equalizer. I put fresh electrolytic caps in my 901V equalizer, but I didn't do anything with the other caps, the silicon, or the resistors. Click to expand. I think I would have gone with Nichicon KWs for the power supply caps, and low leakage KLs everywhere else there were caps in the signal path. Maybe even using film caps if physically possible. I can post a parts list, but it would be different to your EQ. Lee.Where Bose used a ceramic cap, I used a ceramic cap. Electrolytics were Nichicon VX series (their only axial lead cap I think), except for the four that are in the signal path, I managed to squeeze in Cornell Dubilier films there, and I also used these elsewhere. I think I would have gone with Nichicon KWs for the power supply caps, and low leakage KLs everywhere else there were caps in the signal path. Maybe even using film caps if physically possible. Click to expand. Click to expand. The left channel on mine no longer works and I am trying to trouble shoot.I'm also 901 owner. and listener The problem I met was at the first place, the EQ. It's s-IV. They are designed long time ago, before CD and DVD players. And as we know, their output signal is about 2V. EQ s-IV and earlier are designed for tape deck, tuner and turntable signals, which is about 0.5V. The higher signal levels overload the EQ and begin distortions. That's why, if you use players without regulated outputs, or if your receiver or preamp inputs are not attenuated, you'll have problems with the quality of the sound.But you know this very well Lately I use mine with The Bose Spatial Receiver. And even with this old vintage, with dry old capacitors and mash of switches and wires inside, I think, they sound well. And my advice is - don't try to use them without the right EQ. It's waste of time.Btw I think the 901's mid-century modern styling still looks cool, especially the black version and especially when the Bose pedestals are used with them (they were used this way in a cellphone commercial about four years ago, located in a swanky, light-colored modern apartment).OTOH, currently an old vintage speaker as the early series of 901 is much harder to beat than in those days, because the tendency of the sonic quality from today's commercial speakers have become significantly worse, even in the upper price class. Keep this always in mind. I am looking for a diy project with cheap but good quality full range transducers with the same design goals than by the 901, but higher quality.As I recall, they did sound amazing for their size.But for sure, it's not about the price, and for sure results are good By the way, I listen and a pair of 601s s-1, but they are fare from 901s, by my own Resources saved on this page: MySQL 15.79 vBulletin Optimisation provided by. Something went wrong.Learn more - opens in a new window or tab 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. For additional information, see the Global Shipping Program terms and conditions - opens in a new window or tab Delivery times may vary, especially during peak periods. Learn more - opens in a new window or tab Learn more - opens in a new window or tab Learn more - opens in a new window or tab Learn more - opens in a new window or tab Learn more - opens in a new window or tab Contact the seller - opens in a new window or tab and request a postage method to your location. Please enter a valid postcode. Please enter a number less than or equal to 34. If you don't follow our item condition policy for returns, you may not receive a full refund. Refunds by law: In Australia, consumers have a legal right to obtain a refund from a business if the goods purchased are faulty, not fit for purpose or don't match the seller's description. More information at returns. My listing includes insured, return shipping only Honest seller. Great communication. He has done great work replacing the capacitors on my Series IV EQ in the past, and is now performing upgrades on this unit's RCA jacks as well as amp and audio sections. If you haven't heard the difference between an aged EQ and one that has been upgraded, I can tell you that there is a substantial difference in the upgraded system's ability to produce rich and detailed sound. In addition to my Series IV 901's with upgraded EQ, I also have a set of new Series VI.2 901's, and, surprisingly, I honestly cannot tell that there is a great deal of difference between the two. I cannot recommend him any more highly. So make the investment; it's way, way worth it! The speakers are 3.75 inches in diameter without a crossover. If you don't use the eq, then you ain't got no highs and you ain't got no lows so it must be Bose. It is totally the fault of low information listeners (some who's confidence level is truly amazing). Bose 901's aren't audiophile speakers and they never intended to be. They are fun, loud, small, dynamic and retro-cool. Buy a set or two of Series I or Series II speakers and get the eq updated. Awesome! The EQ upgrade made a huge difference in sound quality. My son in college loves them and they will rock the house! I was amazed at how good my bose sounded after Dave finished his work. Great job and would highly recommend to anyone to use Dave. He also called and went over everything with me, and that made the process even more special and put me at ease from start to finish. Great job Dave and Thank you With his repairs and upgrades to my equalizer my 901s are alive again. I had bought the speakers and equalizer a few months before, re-foamed all 18 drivers and thought some of them had blown speaker coils, there was a distortion but could not narrow down which drivers. I sent my equalizer to David. The unit was originally setup for 220volts since it was purchase in Germany in 1980. Whom ever tried to change it over to 110volts mess up, the equalizer board was only getting part of the power needed. After David's repairs these old speakers sound band new!!! Through a series of clear, timely emails Dave helped me decide on several upgrades. He then completed the work in a timely manner and when it turned out my speakers needed more work (NOT related his work) he continued his excellent service by advising me how to proceed. All Rights Reserved. User Agreement, Privacy, Cookies and AdChoice Norton Secured - powered by Verisign. It can be found on wiring diagrams of a complete house, houses or the entire residence, and can tell you exactly what wires go where. The yellow and white wires are known as the Positive and Negative (or 120V), respectively. They run along the outer edge of the ring with the black ring being the electricity socket. Red and black are also referred to as the Neutral (or the origin ) wire. You may have also noticed there is a longer, thin metal cable in the middle of the power strip in which the yellow and white wires meet. This is the third cable, known as the Run Wire. It connects the s positive (or 120V) cable to the Run Wire from the power strip, and this is where most of the current flows. It is simple to take a look at as fridge wiring diagram if you need some help in learning how to read it. In this case, if you are not familiar with how a grounding cable works, you can stop here, but if you want to find out more about how to understand the diagrams and understand them, keep reading. To start with, remember that each refrigerator wiring diagram will look slightly different. He has written several books on rewires, and will be the very best resource for you. You could be thinking about how to read as fridge wiring diagram. At first, you may find the reference very intimidating, particularly if you are already not knowledgeable about wiring diagrams. The wiring diagram is quite straightforward and is there to help you keep tabs on where the power supply has to go in order to make it operate. You should be able to locate the powerstrip using the yellow wires at the base and the black wires at the top. Place the cable that runs through the powerstrip (along with the neutral) and note where the line satisfies the corresponding side of this powerstrip. The picture shows you what I believe. It's that simple. Next time you are having trouble with your electric wiring, or in any type of electrical endeavor, consider studying as refrigerator wiring diagram and discover how to read one. With just a little patience and effort, you will discover how to read as refrigerator wiring diagram so that you can troubleshoot electrical issues using a minimum of fuss. Please do not offer the downloaded file for sell only use it for personal usage. Looking for other manual? For this no need registration. May be help you to repair. You could suffer a fatal electrical shock. Instead, contact your nearest service center. Note! To open downloaded files you need acrobat reader or similar pdf reader program. In addition, Also some files are djvu so you need djvu viewer to open them. These free programs can be found on this page: needed progs If you use opera you have to disable opera turbo function to download file. If you cannot download this file, try it with CHROME or FIREFOX browser. Translate this page: Relevant AUDIO forum topics: Bose Sounddock 1 tapegyseg csati Sziasztok. Egy baratom megkert, hogy talaljak vagy gyartsak egy tapegyseget a Bose dokkolojahoz. Sajnos az eredetiket aranyarban adjak, igy gyartanom kell egyet. Talatam is egy elegans kis 4 pines csatit, de fennakadtam az eredeti csatlakozo labkiosztasan. Talaltam egy rajzot de nem tudom eldonteni, hogy a kabelen levot abrazolja, vagy a dokkoloban levot. Basszus vegfoka 2-3mp mulva megfut vagy pozitivba vagy negativba ha nincs a hangszoro rarakva, hangszoroval azonnal letilt, (amikor a kimeneten eljut DC 4V-ig a vedelem lekapcsolja relevel az erositot). Mikor a MUTE hibat kerestem, volt olyan eset is, hogy nem futott meg a kimenet es szolt a basszus rendesen, de ujboli bekapcsolaskor ha nem halkitottam le a potit akkor kikapcsolt a rele, ha lehalkitottam akkor jo lett, de nagyon susogott, arra hasonlitott mint amikor FM radio nincs az allomason, van egy kozos mute tranzisztor az kapcsolja az osszes tobbit, ha azt kiszedtem akkor is megmaradt a susogas, szerintem visszafele jott valamelyik oldalrol ezert szedtem ki mindegyik oldalrol a tranzisztorokat, nem akartam bajlodni vele, hogy honnet jon a susosgas vissza. Mi lehet a gond? BOSE bekotesi rajz Legyszi legyszi ha valaki tudnasegiteni egy BOSE AMP2440-as erosito bekoteseben,azt nagyon szepen megkoszonem. Ez AUDI A3-asbol van, a steker nincsmeg. Bose Lifestyle CD-20 FLC kijelzo halvany Sziasztok! A fenti keszuleknek halvany a kijelzese. Eleg erdekesen van megoldva a kijelzo tapfesze, sokban fugg a bejovo 12VAC feszultsegtol. Kerdesem az lenne, hogy a futest probaljam emelni, vagy a -24V-ot. A D8-on a 30V is kevesebb, de az AC 4.5V is. Melyik befolyasolja jobban a fenyerot. A futes, vagy a negativ tapfesz? Udv: Jacint Similar manuals: You can write in English language into the forum (not only in Hungarian).