PSI Audio A21-M Red

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Huge bandwidth top to bottom, the A21 is where it's at if you can get there, delivering resolution and detail unmatched by any other!

This is the red finish listing, be sure to visit out other A21-M finish listings.

Perfectly accurate mid field monitor

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.

Your success story with the A21-M

Only you know where your story begins, and who knows where it will take you?
With the A21-M, you certainly know what you hear: a precise replica of what the sound was intended to be.

Make sure that little details cannot sneak past you during mixing, the A21-M lays them all bare before you. This quality has earned PSI Audio the respect of sound professionals all around the world. As a large nearfield monitor, the A21-M puts the entire soundstage right before your ears with peculiar precision, as lifelike and natural as a reproduction can possibly be. Stop listening for little mistakes – with the A21-M you just hear them. We must warn you though: once you have experienced the real thing, you will not be able to accept anything less.

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.

Expand the bottom end

While the A21-M already reaches down to 38 Hz, its low end can be extended further by adding one or two subwoofers to the system. An A225-M or a pair of A125-M subwoofers will unleash the full potential of the A21-M at any listening level, translating its accurate reproduction qualities into the lowest registers.


  • Power: 280 + 45W
  • Frequency Range: 38Hz – 23kHz
  • Peak max. SPL@1m: 121dB
  • 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

A21-M – Who is it for?

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.

Each speaker is individually calibrated in our anechoic chamber and is delivered with its frequency response sheet. A proof of quality.

Our ONE WITH EVERYTHING ZEN WARRANTY extends the standard manufacturer warranty by one year, see our ZEN WARRANTY page for details.

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