• EQ901Elite Equalizer for BOSE 901 - Select Your Series I/II or III/IV or V/VI


    EQ901 Elite Equalizer for BOSE 901® Select Your Series I/II or III/IV or V/VI

    In Stock

    Same Business Day Shipping

    FedEx Express 2-day Free for Domestic U.S. Shipments

    International Customers - Rates Below

    EQ901 Features Comparison Guide

    The EQ901 Elite is an ultra high performance replacement for existing BOSE 901® Series I/II, III/IV or V/VI equalizers (select your series when ordering*).


    The unit provides the BOSE 901 specific equalizer curves with four tone modes that accommodate a wide range of room conditions and recording variations. Designed for use with high-quality pre/power amplifiers or integrated amplifiers and receivers, the unit builds on our EQ901B series with lower distortion, greater dynamic range and higher fidelity, providing audiophile-grade digital signal processors, DACs and analog signal stages.


    • The EQ901 Elite Series features four specifically designed equalization curve sets unique to each Series I/II, III/IV or V/VI

    • Precise 901 equalization is performed digitally in an Analog Devices 400MHz SHARC DSP processor with 24 bit resolution

    • Two identical stereo pair outputs are available, allowing for dual active stereo systems (two stereo power amps) or the addition of an active subwoofer(s) 

    • IR Remote with selectable tone mode settings: 

      • Normal mode 

      • Enhanced mode 

      • Warm mode 

      • Low frequency reduction mode 

    • Ultra low distortion 2.0 Vrms output driver stage 

    • Selectable input sensitivity of 2.0 Vrms or 4.0 Vrms 

    What’s Included

    • EQ901 Elite equalizer for BOSE 901 Series I/II, III/IV or V/VI

    • Four precision engineered tone mode equalization curves 

    • IR Remote Control for tone mode selection 

    • External power supply

    Tape/Processor Loop Set Up

    Pre / Power Amplifier Setup

    IR Remote Control

    Setting Tone Modes

    Selection of the tone mode is generally a subjective choice based on what sounds best to you. Specifically, Normal mode is the most neutral, Enhanced mode provides a richer sound with more treble and bass, Warm mode adds midrange with slight treble reduction, and Low Frequency Reduction mode is intended to control bass in smaller rooms or on “boomy” recordings.

    Analog Input Level

    The analog audio input levels are switchable between 2.0 Vrms and 4.0 Vrms to accommodate use with most equipment. The EQ901 Eite is shipped with the analog input level set to 2.0 Vrms. The only user-accessible jumpers are used to set the analog input sensitivity. The jumpers are located on the internal PC board near the RCA input jacks. 


    • EQ901 Elite platform base:  miniDSP 2x4 HD 

    • Digital Signal Processor Engine:  Analog Devices Fixed Point DSP SHARC ADSP-21489

    • Digital to Analog Converter (DAC):  AK4626A 

    • Internal Processing Resolution and Sample Rate:  32 bit / up to 192kHz

    • Audio Input / Output Connectivity:  Unbalanced Output, RCA 

    • Input / Output Max Levels:  In 2.0 Vrms / 4.0 Vrms (jumper-selectable), Out 2.0 Vrms

    • Input Impedance: 10Ω 

    • Output Impedance:  560Ω 

    • Filtering Technology:  FIR + I/IIR 

    • Dimensions:  27h x 119w x 107d mm 

    • Power:  12V DC Single Supply, 2.1mm round plug, 2.5Watt 

    • IR Remote:  miniDSP Remote


    • 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.


    Orders received by 2 PM MT are shipped the same business day. U.S. domestic orders ship FedEx 2-Day Express for free. Canadian orders ship FedEx for $24.95, other international orders ship FedEx for $39.95 (global carrier may vary).

    User Links
    EQ901 Elite User Guide
    Connecting your EQ901 to an Audio Video Receiver (AVR)
    EQ901USB Subwoofer Option Supplement
    Deer Creek Audio EQ901: The Hook Up

    EQ901 Features Comparison Guide

    Podcasts, in collaboration with WNY Media Works

    Deer Creek Audio EQ901: How It All Began

    Deer Creek Audio EQ901: All Models 

    Deer Creek Audio EQ901: The Hook Up