EQ901B-III/IV – Replacement Upgrade for BOSE 901
®
Series III/IV Equalizers
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The EQ901B-III/IV is a direct replacement for existing BOSE 901
®
Series III/IV equalizers, providing improved clarity, imaging and range. The EQ901B-III/IV features dual equalization curves, normal and enhanced, that accommodate your Series III/IV depending on personal preference.
The EQ901B-III/IV installs in your tape monitor loop, pre-out / main-in loop, or between your preamp and power amp. Switchable input levels between 0.9 Vrms and 2.0 Vrms accommodates use with most preamplifiers, amplifiers or receivers.
Tape Monitor Loop Installation
Pre / Power Amplifier Installation
Features
Precision Engineered BOSE 901 Series III/IV Equalization
Dual equalization curves, normal and enhanced
Ultra low noise and proven reliability
Based on the miniDSP 2×4 digital signal processor
Tone Controls
The EQ901B-III/IV has been calibrated to provide a neutral and natural sound without tone control adjustments
There are no external tone controls on the EQ901B-III/IV; your audio/video receiver or amplifier tone controls are used to make fine adjustments
The EQ901B-III/IV 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
What’s Included
EQ901B-III/IV Equalizer
Precision frequency equalization curves optimized for BOSE 901 Series III/IV
Regulated U.S. power supply
User Guide
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, high quality, shielded, high fidelity
Support
30-day 100% satisfaction guarantee
U.S. technical support through Deer Creek Audio
Installation guide and phone support
Deer Creek Audio is an authorized miniDSP dealer
Warranty Terms
This product is warranted to be free from defects in materials and workmanship for a period of one year from invoice. Warranty does not cover failure of the product due to incorrect connection or installation, improper or undocumented use, unauthorized servicing, modification or alteration of the unit in any way, or any usage outside of that recommended in the product manual. The customer provides return shipping to Deer Creek Audio. Deer Creek Audio is an authorized miniDSP dealer.