This auction is for Bose 901 Series IV Active Equalizer. It was recently professionally serviced. The copy of the receipt will be included with the purchase.Also, Its fully tested and demo included. Full demo is included here: DEMO: Full Demo CONDITION REPORT: Good used condition - shows some cosmetic wear associated with age including marks, light scratches, button cover is missing (button is functional). This Bose 901 Series IV Active Equalizer is recently serviced and is fully functional. Please see images / full video demo for more details. The following basic functionality tests were performed: 1.Playback via Bose 901 speakers (bypass and active), 2.Low Filter Control, 3.High-frequency Control, 4.Low Frequency Control, 5.TAPE Monitor Switch. Product Information: 901 Series IV active equalizer Input Impedance: 60 k ohms (60 k?) Usable dynamic range: 106 dB @ 35 Hz Noise (A-weighted): 85 dB below 1 volt Distortion: Less than 1% THD at 1 kHz, 1 V input Min Impedance: 5 k ohms (5 k?) Maximum output voltage: 2.5 volts Maximum gain: 21dB at 16kHz (center setting) Compensation controls: Low Filter Control: Two-position, 5 dB decrease at 40 Hz. High-frequency Control: Continuously adjustable slider, shelving control with range of ±8 dB @ 10 kHz Low Frequency Control: Continuously adjustable slider, ±8 dB adjustment over band from 100Hz to 400Hz. TAPE Monitor Switch: Replaces tape monitor switch on receiver or amplifier when equalizer is connected in tape monitor circuit: Cabinet: walnut wood veneer Dimensions: 11.25W x 2H x 5D Weight: 2 lbs

This auction is for Bose 901 Series III Active Equalizer. It was recently professionally serviced. The copy of the receipt will be included with the purchase.Also, Its fully tested and demo included. Full demo is included here: DEMO: Full Demo CONDITION REPORT: Good used condition - shows some cosmetic wear associated with age including marks, light scratches. This Bose 901 Series III Active Equalizer is fully functional. Please see images / full video demo for more details. The following basic functionality tests were performed: 1.Playback via Bose 901 speakers (bypass and active), 2.Below 40 Contour Control, 3.High-frequency Contour, 4.Mid-Bass Contour, 5.TAPE Monitor Switch. Product Information: 901 Series III active equalizer Input Impedance: 60 k ohms (60 k?) Usable dynamic range: 106 dB @ 35 Hz Noise (A-weighted): 85 dB below 1 volt Distortion: Less than 1% THD at 1 kHz, 1 V input Min Impedance: 5 k ohms (5 k?) Maximum output voltage: 40 volts Maximum gain: 20dB at 16kHz normal dotted ceiling Compensation controls Below 40 Contour Control: Two position, eight-dB decrease at 40 Hz. High-frequency Contour: Continuously adjustable slider with center detent; shelving control with range of ±2.5 dB @ 4 kHz Mid-Bass Contour: Continuously adjustable slider with center detent; +3 dB, -5 dB adjustment over band from 80Hz to 260Hz. TAPE Monitor Switch: Replaces tape monitor switch on receiver or amplifier when equalizeer is connected in tape monitor circuit: Cabinet: walnut wood veneer Dimensions: 11.25W x 2H x 5D Weight: 2 lbs

BOSE 901 Speakers Active Equalizer Series II Professionally Restored by an expert Bose technician Overall excellent cosmetic condition. See pictures.All capacitors have been replaced and item fully tested. New power cord All buyers must have minimum of ten reviews with 98% or better satisfaction rating or buy/bid will be cancelledFrom a smoke free home Please contact me if you have any questions or would like additional picturesWe combine shipping just askPayment is due three days after purchasePlease visit our store The Celestial Emporium, new items are being added every day Policy: ALL BUYERS PLEASE CONTACT US BEFORE ANY RETURN REQUEST WE WILL WORK WITH YOUWe ask that all our buyers please email us with any problem before leaving a negative or neutral feedback, we will do our best to solve it for you.We care about our buyers and we only want to see them happy. We value your business and we want to see all of our buyers satisfied.

BOSE 901 Speakers Active Equalizer Series II Professionally Restored by an expert Bose technician Overall excellent cosmetic condition. See pictures. All buyers must have minimum of ten reviews with 98% or better satisfaction rating or buy/bid will be cancelledFrom a smoke free home Please contact me if you have any questions or would like additional pictureWe combine shipping just askPayment is due three days after purchasePlease visit our store The Celestial Emporium, new items are being added every day Policy: ALL BUYERS PLEASE CONTACT US BEFORE ANY RETURN REQUEST WE WILL WORK WITH YOUWe ask that all our buyers please email us with any problem before leaving a negative or neutral feedback, We will do our best to solve it for youWe care about our buyers and we only want to see them happy. We value your business and we want to see all of our buyers satisfied.