Eleven Dimensions Media, LLC
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    • BOME >
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A21-M

Perfectly Accurate
Midfield Monitor

Redefine the Way You Produce!

Powerful for its size, it delivers an uncompromised quality in term of stereo image, low end control and transparency all over the bandwidth. Are you ready to step ahead?
BUY NOW
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Main Features

  • Power: 280 + 45W
  • Frequency Range: 38Hz – 23kHz
  • Peak max. SPL@1m: 121dB
  • Typical listening distance: 1 to 3m
  • 100% Analog – No DSP
  • Flat frequency response
  • Perfect stereo image
  • Handmade tweeter
  • Class A/B Amplifiers
  • Individually calibrated
  • 5+1 years warranty
  • Handmade in Switzerland
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Power:
280 + 45W
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Frequency Range:
38Hz – 23kHz

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Peak Max. SPL@1m:
121dB
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Listening Distance:
1 to 3m

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
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"Working on a mix with these monitors was a joy, making compression and equalization decisions very intuitive and natural, simply because you can hear what you're doing so easily!"

 – Hugh Robjohns
Sound On Sound Magazine

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Read the Review

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 artifacts are easy to identify with the phase-corrected reproduction of PSI Audio speakers.
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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.
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Technical Data

Item
Potential Peak Power
280 + 45 W
Continuous Max SPL @1m
106 dB
Short Term Nax. 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 way
Crossover Frequency
2400 Hz
Woofer Ext. Diam.
9.4 inches / 240 mm
W. Diaphragm Diam
6.8 inches / 172 mm
Tweeter Ext. Dim.
3.9 inches / 100 mm
T. Diaphragm Diam.
1.06 inches / 27 mm
Dimensions W x H x D
9.9 x 15.8 x 11.9 inches / 250 x 400 x 300 mm
Net Weight
12.8lbs / 12.8 Kg
Input Connector
1 x XLR F / 3P
Warranty
5 (+1) years
Download Tech Datasheet
Download User Manual

Flat Response

Each speaker is individually calibrated in our anechoic chamber and is delivered with its frequency response sheet. A proof of quality.
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A21-M – The Perfect Compact 2-way Studio Monitor

Sitting comfortably in between typical midfield systems and traditional nearfield monitors, the A21-M packs the punch of the larger speakers while retaining a comfortably compact size. It performs well in both scenarios, making it the perfect solution for studios who require the power of a midfield system without having the space for one.
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A14-M Studio

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A14-M Broadcast

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A17-M

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A21-M

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A23-M

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A25-M

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A215-M

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A214-M

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A125-M

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A225-M

Click on a picture to choose a product from our coherent range of monitors.

A21-M Studio – 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.
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Handmade in Switzerland

All our products are handcrafted in Switzerland with passion and attention to detail.

Manufacturing by hand allows to match and adjust components so that tolerances cancel each other out instead of building up, as is often the case in industrial production.
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Choose Your Color

Choose between Studio Red, Metal Black, and Pure White. Cabinets are manufactured with great care and attention from the choice of the wood all the way through to the paintwork.
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Options

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Compact Sub A125-M

A pair of A125-M subwoofers perfectly matches a pair of A21-Ms
MORE INFO
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Subwoofer A225-M

More low end (24Hz), more power for your A21-M setup
MORE INFO
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Active Bass Traps

Effortlessly remove room modes from your studio
MORE INFO
BUY Now
Get a Demo
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 © 2025 Eleven Dimensions Media, LLC. All rights reserved.
  • ABOUT
  • PRODUCTS
    • Auro 3D Audio
    • BOME >
      • BOME Network Pro
      • MIDI Translator Pro
      • BOME Box
    • ESI Audiotechnik >
      • USB Audio Interfaces >
        • UGM192
        • MAYA22 USB
        • MAYA44 USB+
        • U24 XL
        • Gigaport eX
        • U22 XT
        • U22 XT cosMik Set
        • U86 XT
        • U108 PRE
        • U168 XT
        • Dr. DAC nano
      • Network Audio Interfaces >
        • planet22x
      • PCIe Audio Interfaces >
        • MAYA 44 eX
      • Mobile Accessories >
        • cosMik Lav
        • MIDI nTour CX
      • MIDI Interfaces >
        • MIDIMATE eX
        • M4U eX
        • M8U eX
      • Studio Accessories >
        • cosMik uCast
        • cosMik 10
        • eXtra 10
        • MoCo
      • Monitoring Speakers >
        • aktiv 05
        • unik 05+
        • unik 08+
        • aktiv 10s
    • LIVELOOP >
      • LIVELOOP
    • PEACH AUDIO >
      • CUBE 5
    • Ploytec >
      • PL2
      • AROMA
      • ONE.2
    • PSI Audio >
      • STUDIO MONITORS >
        • A14-M V3 Studio
        • A17-M
        • A21-M
        • A23-M
        • A25-M
        • A215-M
        • A214-M
        • A125-M
        • A225-M
      • ACTIVE BASS TRAPS >
        • AVAA C214
        • AVAA C20
        • AVAA TECHNOLOGY
      • Accessories >
        • R&B Router & Bass Management
        • Metal Grill & Brackets
        • Gig Bags
    • reProducer Audio Labs >
      • Epic 4 Nearfield Studio Monitor
      • Epic 5 Nearfield Studio Monitor
      • Epic 55 Midfield Studio Monitor
    • Teknosign >
      • BOX LINE >
        • PEQ – Parametric Equalizer
        • MVC – Vari-Mu Compressor
        • DSMP – Dual Solid State Mic Preamp
        • SSMP – Solid State Mic Preamp
        • RPS – BOX Line Power Supply
        • PPS – 48 Volt Power Supply
        • SAM – Sum Adjust Mini
        • DIA – Dual Active DI Box
        • DIP – Dual Passive DI Box
        • DPS – Dual Mic Splitter
        • HPA – Headphone Amp
        • HUB – High Power USB Hub
        • MNB – Mini AC Line Conditioner (USA)
        • MNB – Mini AC Line Conditioner (EU)
      • Summing Amplifiers >
        • Sum Adjust Classic
      • Automixer
      • Patchbays & Adapters
    • Ultramixer
    • Zynaptiq >
      • Zynaptiq Software Bundles >
        • CREATE Bundle
        • REPAIR Bundle
        • MASTER II Bundle
        • ZAP Bundle V
        • The Mac Audio Apps Bundle >
          • TRIUMPH
          • LOOP EDITOR
          • MYRIAD
          • SPECTRE
      • INTENSITY 2
      • BALANCE >
        • BALANCE - Mobile
      • PUNCH
      • PITCHSHIFT
      • PITCHMAP::Colors
      • ORANGE VOCODER nano
      • ORANGE VOCODER IV
      • ADAPTIVERB
      • WORMHOLE
      • MORPH 3
      • UNMIX::DRUMS
      • UNVEIL
      • UNFILTER
      • UNCHIRP
      • PITCHMAP
      • TIME FACTORY II
  • COMMUNITY
    • Product Reviews
  • BUY