BOSE 901 Speakers Active Equalizer.Works with Series I or II Speakers.Tested on Series I Speakers in Working Condition.Overall Very Good Clean Physical Condition with Light Scratches in the Top.Also both bottom rear corners of the faux wood case have damage.Please view all photos and use your best judgement towards overall condition.

Fully functional, one non-Bose slider knob (see pics)

Vintage BOSE 901 Active Equalizer Series II POWERS ON TESTED USED. As you can see in the pictures, there is some slight damage to the wooden case.

Bose 901 active equalizers 100% working condition

Vintage 901 Bose speakers with Equalizer speakers re-foamed and equalizer has been re-cappedReady to go for another 30 yrs Thanks for looking

Enhance your audio experience with the Rare Vintage Bose 901 Active Equalizer Series II Tape recorder/Amplifier. This high-quality unit boasts 2 channels and 4 inputs, along with 4 outputs for ultimate control over your sound. The wooden exterior adds a touch of retro style to your setup. This unit, manufactured in an unknown location, is perfect for audiophiles and music enthusiasts alike. It features digital technology and is a great addition to any home audio system. Get your hands on this unique Bose 901 Active Equalizer Series II and take your listening experience to the next level. Now for the human response: selling this for a buddy, I tested it on my home PA system and it is definitely functional. Add those classic Bose sparkling highs. ????

Used work fine.

SEHRGUT ERHALTENE BOSE 901. ACTIVE EQUALIZER SERIES II. BOSE. CORPORATION IST FUNKTIONTÜCHTIG PRIVAT VERKAUF DAHER KEINE GARANTIE UND RÜCKNAHME NACH DEM KAUF

Recently recapped and in very good working condition. Also an excellent cosmetic condition and sounds great.

Item is not tested. We dont have a way to test the unit. No accessories included. All the items included are what you see in the pictures. Item is sold AS IS for parts or repair. No returns accepted.

Up for auction is this BOSE 901 SERIES III Acive Equalizer High Low Frequency for Bose 901 series speakers. Cosmetically in fair condition. Shows some signs of age but works properly. Please check pictures for condition. Thanks for looking and good luck.

Selling a Bose 901 Series II equalizer. Was used about 6 months ago and works as it should. The little red light on the front doesnt work, but seems to be a simple replacement. Pretty good cosmetic condition except for one dented corner. Please refer to photos. Happy bidding!

Bose 901 Series IV B Equalize! I bought this as a back up and am downsizing. It was purchased unopened and I used it briefly before putting it away. I have series VI but prefer the (in my opinion) somewhat warmer sound of series III and IV, and it made my series VI sound sweet). The story behind IV B is they only made a very limited number of them as Series IV was being replaced by Series V. I was able to find on line from Bose that the series IV eq supply was used up and they had to utilize series V chassis, parts and cases to make this eq to have the correct series III and IV curve. The best part of it was Bose began to make the equalizers so much better at this time (1983 for this one, the beginning of the series V era) with much better quality everything. It would be a challenge to find a nicer one that this, if you could find one at all! This has some insignificant marks on the case, stains on the box and is really very nice. It sounds warm and wonderful as it should. Dont miss it! Best one you’ll likely ever see!

Vintage Bose 901 Series IV Active Equalizer for Series III and IV LoudspeakersBose 901 Series IV Active EqualizerFor use exclusively with Bose 901 Series III and IV LoudspeakersInput: 110-120V AC 60HzSerial: 268178Cabinet construction: Genuine walnut veneer laminated to particle boardItem is used and tested in excellent working condition. There are very few very small marks to the top and side veneers, and there are no major cracks or gouges. There are a few light scratches in the aluminum top and face. The cord is free of any kinks or cuts. Includes only items pictured. Please view photos for more detail.Thank you 101323NSEJ-F1

BOSE 901 Speakers Active Equalizer Series I or II Testing Working w/ cables Tested working with speaker cables. ready to use. Fast free shipping to the lower 48 states.

Direkt reflecting speaker system mit Equalizer und Bose . Der technische Zustand ist einwandfrei.Den äußeren Zustand entnehmen Sie bitte den beigefügten Fotos. Inkl. Tulpenfüße und Equalizer Bose 901 Serie II Aufgrund des Gewichtes müssen 2 Pakete gepackt werden.Das Versandrisiko liegt beim Verkäufer.Die Versandkosten beziehen sich auf Versand innerhalb Deutschlands. Viel Spass beim Bieten

This is a Bose Series lll Active Equalizer and it is in excellent condition. International buyers, please note:This item ships worldwide. Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer’s responsibility. Please check with your country’s customs office to determine what these additional costs will be prior to bidding/buying. These charges are normally collected by the delivering freight (shipping) company or when you pick up the item. Do not confuse them for additional shipping charges. US and international government regulations prohibit us from marking items under actual value or as “gifts”. Please be aware that if you return the item for a refund, the customs charges are not refunded to you. Thank you for your attention

BOSE 901 Active Equalizer Series II SUPER CLEAN POWERS ON TESTED USED VERY CLEAN, EXCELLENT CONDITION, minor signs of wear. Tested Power, Clear audio signal in and out of Amplifier Connections side I consider myself a pretty competent audiophile, I have a ton of Hi-Fi gear, and have repaired and restored receivers, turntables, cameras, computers, cars etc. I have NO CLUE how this thing works... I hooked up the Amplifier Connections side and it sounded awesome, I could hear some subtle differences in tone when running the dial around. I didnt understand the Tape recorder connections protocol, so I can neither confirm or deny that they are functioning properly. There was audio but it was very faint... PHOTOS ARE OF ACTUAL ITEM YOU WILL RECEIVE PLEASE DONT HESITATE TO MAKE AN OFFER OR ASK ANY QUESTIONS!!! ****************************************************************************************************************************** I normally ship 1-2 business days (or same day) from cleared payment! (Before 4PM EST) Please do not hesitate to reach out with any questions or concerns before bidding or purchasing! I am normally very responsive and will return messages within the hour or end of day at the latest. Thanks, and good luck!!! *** DISCLAIMER: I AM NOT AN EXPERT COLLECTOR OF THESE ITEMS*** All information provided is to the best of my untrained eye. Please carefully review images of ACTUAL items for more details ***Listing is for ONE item***

Bose 901 Series IV B Equalize! I bought this as a back up and am downsizing. It was purchased unopened and I used it briefly before putting it away. I have series VI but prefer the (in my opinion) somewhat warmer sound of series III and IV, and it made my series VI sound sweet). The story behind IV B is they only made a very limited number of them as Series IV was being replaced by Series V. I was able to find on line from Bose that the series IV eq supply was used up and they had to utilize series V chassis, parts and cases to make this eq to have the correct series III and IV curve. The best part of it was Bose began to make the equalizers so much better at this time (1983 for this one, the beginning of the series V era) with much better quality everything. It would be a challenge to find a nicer one that this, if you could find one at all! This has some insignificant marks on the case, stains on the box and is really very nice. It sounds warm and wonderful as it should. Dont miss it! Best one you’ll likely ever see!

Item: Vintage Bose Series II 901 Active Equalizer. SOLD AS-IS NO RETURNS. Condition: UNTESTED, was plugged in and light comes on, no ability to test otherwise, sold as is for parts or repair, some chipping on the edges and corners and general wear all over, knob comes off fairly easily, not sure if its original but the selector moves normally when knob is attached. SOLD AS-IS NO RETURNS. See all photos for exact condition and check out my other listings. Tax / Shipping / Payments: Sales tax will be charged in several states. Please check the shipping and payments for a list of the states where sales tax is collected. All items ship either standard USPS or Fed Ex unless otherwise noted or requested. I strive to ship items within 1 business day of received payment. You may upgrade to expedited shipping at an additional cost. Please contact before payment if this service is required. Customers needing international shipping are not eligible for free shipping and will be required to pay the full shipping rate of their choice as directed by the Global Shipping Program rates. This is a fixed cost calculated by eBay and cannot be reduced. They may also be responsible for duties and fees associated and are 100% responsible for any additional fees that could come along. Returns/Customer Service: No Returns on this item. Please DO NOT open a case through eBay without first contacting me to resolve any and all issues that could come up during a transaction. Customer satisfaction is very important to me and I am sure I can remedy anything that could come up. If there is anything that would lead you to give anything less than 5 star feedback please contact me prior to leaving feedback so I can work with you to make you transaction a pleasant one. Disclaimer: All items are sold in as-is condition and buyer/bidder should fully evaluate and understand what they are buying before purchasing. There are no warranties expressed or implied on any items both new and used. All items are eligible for the 30 day return policy unless otherwise noted. All items must be paid for within 3 business days or a nonpayment case will be opened and buyer will be reported. Feel free to contact me with any questions I will do my best to respond promptly. Thanks For Looking

I bought this as a back up and am downsizing. It was purchased unopened and I used it briefly before putting it away. I have series VI but prefer the (in my opinion) somewhat warmer sound of series III and IV, and it made my series VI sound sweet). The story behind IV B is they only made a very limited number of them as Series IV was being replaced by Series V. I was able to find on line from Bose that the series IV eq supply was used up and they had to utilize series V chassis, parts and cases to make this eq to have the correct series III and IV curve. The best part of it was Bose began to make the equalizers so much better at this time (1983 for this one, the beginning of the series V era) with much better quality everything. It would be a challenge to find a nicer one that this, if you could find one at all! This has some insignificant marks on the case, stains on the box and is really very nice. It sounds warm and wonderful as it should. Don't miss it! Best one you’ll likely ever see!

This vintage Bose 901 Series IV active equalizer is a rare find for any audiophile. With its sleek brown exterior, it adds a touch of sophistication to any home audio setup. Designed specifically for use with Bose 901 Series IV speakers, it delivers unmatched sound quality and clarity. The equalizer has been well-maintained by its previous owner, ensuring its excellent working condition. Its brand, Bose, is renowned for producing top-of-the-line audio equipment, and this equalizer is no exception. Add this piece to your collection and take your listening experience to the next level. Item is used and does show some ware but overall still displays great and works as you can see the power is lit up. If you have any questions please let ask me or refer to the pictures as everything is sold as is. Before you go check out my other listings. Thanks for stopping by.

I bought this as a back up and am downsizing. It was purchased unopened and I used it briefly before putting it away. I have series VI but prefer the (in my opinion) somewhat warmer sound of series III and IV, and it made my series VI sound sweet). The story behind IV B is they only made a very limited number of them as Series IV was being replaced by Series V. I was able to find on line from Bose that the series IV eq supply was used up and they had to utilize series V chassis, parts and cases to make this eq to have the correct series III and IV curve. The best part of it was Bose began to make the equalizers so much better at this time (1983 for this one, the beginning of the series V era) with much better quality everything. It would be a challenge to find a nicer one that this, if you could find one at all! This has some insignificant marks on the case and is really very nice. It sounds warm and wonderful as it should. Dont miss it!

This Bose 901 Equalizer is designed to work with the Bose Series 1 901 speakers. The speakers will not sound good without it.Simply connect the eq through the tape loop or pre-out / main-in on your amplifier or receiver. Or if you are using only a single source such as a turntable or CD player connect the eq between the receiver and the source component. Item light comes on but flickers. This is untested with components. Please see photos for details.