User Guide

EQ901 Elite Features

  • The EQ901 Elite Series features four specifically designed equalization curve sets unique to each Series I/II, III/IV or V/VI (select your series when ordering)

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

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

  • IR Remote selectable tone mode settings:

1.    Normal mode

2.    Enhanced mode

3.    Warm mode

4.    Low frequency reduction mode

  • Ultra low distortion 2 Vrms output driver stage

  • Selectable input sensitivity of 2 VRMS or 4 VRMS

What’s Included

  • EQ901 Elite equalizer for your BOSE 901 Series I/II, III/IV or V/VI (select your series when ordering)

  • Four precision engineered tone mode equalization curves

  • IR Remote Control for tone mode selection

  • External power supply

Configuration Examples

Tape/Processor Loop Set Up

Pre/Power Amplifier Set Up

Active Subwoofer set up Set Up

Dual Stereo Power Amplifier Set Up

Hardware Installation

When audio input and output connections are being made, be sure that all associated equipment is powered off.  When you power the EQ901 Elite on and off be sure that associated equipment is off first. Connect power to the EQ901 Elite before turning associated equipment on.

Remote Control Functions

Tone modes are  selected on the remote control:


1.    Normal mode

2.    Enhanced mode

3.    Warm mode

4.    Low frequency reduction

Selecting Tonal Characteristics 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 . 


  • 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 & Sample rate: 32 bit / up to 192 kHz

  • Audio Input/Output Connectivity:  Unbalanced output, RCA

  • Input / Output Max Levels: In 2Vrms / 4Vrms (jumper-selectable), Out 2Vrms

  • Input Impedance: 10 k Ω

  • Output Impedance: 560 Ω

  • Filtering Technology: FIR + I/IIR

  • Dimensions: 27 x 119 x 107 mm

  • Power: 12V DC single supply, 2.1 mm round plug, 2.5Watt

  • IR Remote: miniDSP Remote


Analog Input Level

The analog audio input levels are switchable between 2 and 4 Vrms to accommodate use with most equipment.  The EQ901 Eite is shipped with the analog input level set to 2 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.


  • 30 day 100% satisfaction guarantee

  • Installation guide and phone support

  • Deer Creek Audio is an authorized miniDSP dealer

  • One year full replacement warranty

 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 this manual.  The customer provides return shipping to Deer Creek Audio. Deer Creek Audio is an Authorized miniDSP dealer.

Please contact us with any questions you may have