• EQ901PS Equalizer - Powered Sub Crossover for BOSE 901 - Select your Series I/II or III/IV or V/VI


    EQ901PS Equalizer - Powered Sub Crossover for BOSE 901® Series I/II, III/IV or V/VI

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    The EQ901PS (Powered Subwoofer) is a direct replacement for existing BOSE 901® Series I/II, III/IV or V/VI equalizers for users with pre/power amplifiers or pre-in/pre-out ports who wish to add a powered subwoofer to their system. The EQ901PS enhances your 901’s performance, adding deep, tight bass with improved overall musical articulation.

    The EQ901PS I/II, III/IV or V/VI installs in between your pre/power amplifiers, pre-in/pre-out ports of your receiver or integrated amplifier while providing two additional subwoofer outputs. 


    • Precision Engineered BOSE 901 Series I/II, III/IV or V/VI Equalization

    • Active subwoofer crossover with single or dual monaural sub outputs

    • Calibrated to provide a natural sound with seamless subwoofer integration

    • Switchable input levels to accommodate use with most preamplifiers, amplifiers and integrated amplifiers

    • Ultra low noise and proven reliability

    • Based on the miniDSP 2x4 digital signal processor

    What’s Included

    • EQ901PS Equalizer

    • Precision frequency equalization optimized for BOSE 901 Series I/II, III/IV or V/VI

    • Precision active crossover for single or dual active subwoofers

    • Regulated U.S. power supply

    • User Guide

    System Bass and Tone Controls

    • Subwoofer level is fine-tuned with your active subwoofer level and filter controls

    • There are no external tone controls on the EQ901PS. Your audio/video preamplifier or amplifier tone controls are used to make fine tone adjustments.

    • The EQ901PS includes a 48dB/oct subsonic filter


    • 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


    • 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

    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

    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

    EQ901PS User Guide
    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