• EQ901PS-III/IV Equalizer & Active Subwoofer Crossover Upgrade for BOSE 901 III/IV


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    The EQ901PS-III/IV is a direct replacement for existing BOSE 901 ® Series III/IV 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-III/IV enhances your 901’s performance adding deep tight bass with improved overall musical articulation.  The EQ901PS III/IV installs in between your pre/power amplifiers, pre-in/pre-out ports of your receiver, or integrated amplifier while providing two additional subwoofer outputs.Subwoofer level is fine tuned with your active subwoofer level and filter controls

    There are no external tone controls on the EQ901PS-III/IV, your audio/video pre-amplifier or amplifier tone controls are used to make fine tone adjustments.

    Features Summary:

    Precision Engineered BOSE 901 ® Series III/IV 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 & proven reliability
    The EQ901PS-III/IV is based on the miniDSP 2x4 digital signal processor

    What’s Included:

    EQ901PS-III/IV Equalizer
    Precision frequency equalization optimized for BOSE 901 ® Series III/IV
    Precision active crossover for single or dual active subwoofers
    US Regulated power supply- see option for global supply
    User Guide

    The EQ901PS-III/IV includes a 48 dB/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


    One year full replacement warranty
    30 day 100% satisfaction guarantee
    Installation guide and telephone 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

    EQ901PS-III/IV User Guide