EQ901B-I/II - Replacement Upgrade for BOSE 901 I II Equalizers
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The EQ901B-I/II is a direct replacement for existing BOSE 901 ® Series I/II equalizers providing improved clarity, imaging and range. The EQ901B-I/II features dual equalization curves, normal and enhanced, which will accommodate your Series I/II depending on personal preference.
The EQ901B-I/II installs in your tape monitor loop, pre-out/pre-in loop, or between your preamp and power amp. Switchable input levels between 0.9 Vrms and 2 Vrms accommodates use with most preamplifiers, amplifiers, or receivers.

Features Summary:
Precision Engineered BOSE 901 ® Series I/II Equalization
Dual equalization curves, normal and enhanced
Ultra Low Noise & Proven Reliability
The EQ901B-I/II is based on the miniDSP 2x4 digital signal processor
What’s Included:
EQ901B-I/II Equalizer
Precision frequency equalization curves optimized for BOSE 901 ® Series I/II
Regulated US power supply (international optional)
User Guide
Tone Controls:
The EQ901B-I/II has been calibrated to provide a neutral and natural sound without tone control adjustments
There are no external tone controls on the EQ901B-I/II, your audio/video receiver or amplifier tone controls are used to make fine adjustments
The EQ901B-I/II includes a 48dB/Octave subsonic (rumble) filter
Specifications:
Distortion <1% THD at maximum input
Dynamic range: un-weighted >98dB
Analog Devices ADAU1701 digital signal processor (DSP) Engine
Dimensions: 26h x 107w x 94d mm
Support:
One year full replacement warranty
30 day 100% satisfaction guarantee
Installation guide and phone support
Deer Creek Audio is an authorized miniDSP dealer
Recommended accessories:
Global precision regulated AC/DC power supply for :Europe, U.K., Australia and others, plug types: B, C, G, I
RCA Cables - Two (2) Pairs, Excellent quality, flexibility, Shielded, High Fidelity
Shipping:
* Orders received by 11 AM MT are shipped same business day. US Domestic orders ship free, Canadian FedEx is $24.95, Global FedEx is $39.95
EQ901B-I/II User Guide
Features Summary:
Precision Engineered BOSE 901 ® Series I/II Equalization
Dual equalization curves, normal and enhanced
Ultra Low Noise & Proven Reliability
The EQ901B-I/II is based on the miniDSP 2x4 digital signal processor
What’s Included:
EQ901B-I/II Equalizer
Precision frequency equalization curves optimized for BOSE 901 ® Series I/II
Regulated US power supply (international optional)
User Guide
Tone Controls:
The EQ901B-I/II has been calibrated to provide a neutral and natural sound without tone control adjustments
There are no external tone controls on the EQ901B-I/II, your audio/video receiver or amplifier tone controls are used to make fine adjustments
The EQ901B-I/II includes a 48dB/Octave subsonic (rumble) filter
Specifications:
Distortion <1% THD at maximum input
Dynamic range: un-weighted >98dB
Analog Devices ADAU1701 digital signal processor (DSP) Engine
Dimensions: 26h x 107w x 94d mm
Support:
One year full replacement warranty
30 day 100% satisfaction guarantee
Installation guide and phone support
Deer Creek Audio is an authorized miniDSP dealer
Recommended accessories:
Global precision regulated AC/DC power supply for :Europe, U.K., Australia and others, plug types: B, C, G, I
RCA Cables - Two (2) Pairs, Excellent quality, flexibility, Shielded, High Fidelity
Shipping:
* Orders received by 11 AM MT are shipped same business day. US Domestic orders ship free, Canadian FedEx is $24.95, Global FedEx is $39.95