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  • A21MSR

    PSI Audio A21-M Active 8" Reference Studio Monitor (SINGLE)

    The A21-M has unmatched impulse response and stereo image.

    It is an astonishing monitor used for the most demanding audio productions, allowing the user to be in full control of the sound image in all regards down to the finest details.

    The A21-M is exceptionally suited to all levels of music production, from the recording/producing stage to mixing and even mastering. Broadcast and post pro applications will also benefit from its outstanding transparency and fidelity.

    With its outstanding reach in the low end and its still compact size, the A21-M is both versatile and uncompromising in its approach, making it the perfect candidate for all sorts of studios. You can hardly go wrong with an A21-M.

    Main Features


    280 + 45W

    Frequency Range

    38Hz – 23kHz

    Peak max. SPL@1m


    Typical listening distance

    1.5 to 2m

    100% Analog – No DSP

    Flat frequency response

    Perfect stereo image

    Class G/H Amplifiers

    Individually calibrated

    5+1 years warranty

    Handmade in Switzerland

    Perfect Stereo Image

    Stereo is more than just volume differences between the left and right channels. Phase relations are paramount to determine the accurate position of a signal in the acoustic space – and hence equally important in the development of PSI Audio speakers. The accurate phase alignment provided by PSI Audio CPR technology recreates the vivid spatial listening experience as it was intended. Instrument placement, reverb envelopes, even compression artefacts are easy to identify with the phase-corrected reproduction of PSI Audio speakers.

    Flat Response

    Data A21-M [Unit]
    Potential peak power 280 + 45 W
    Continuous max SPL@1 m 106 dB
    Short term max. SPL@1m 110 dB
    Peak max. SPL@1m 121 dB
    Signal to noise ratio (S/N) 98 dBA
    Bandwidth at -6dB 38-23'000 Hz
    SPL tolerances  ±2.0 dB
    Phase tolerances  ± 45 (250 Hz – 20 kHz) deg
    Dispersion (H x V) 80 x 30 deg
    System 2 ways
    Crossover frequency 2400 Hz
    Woofer ext. diam. 240 mm
    Woofer ext. diam. 9.4 in
    W. diaphragm diam. 172 mm
    W. diaphragm diam. 6.8 in
    Tweeter ext. dim. 100 mm
    Tweeter ext. dim. 3.9 in
    T. diaphragm diam. 27 mm
    T. diaphragm diam. 1.06 in
    Dimensions W x H x D 250 x 400 x 300 mm
    Dimensions W x H x D 9.9 x 15.8 x 11.9 in
    Net Weight 12.8 Kg
    Net Weight 28.2 lbs
    Input connector 1 x XLR F / 3P
    Warranty 5 (+1) years