PSI Audio Sub A125-M


The PSI Audio Sub A125‑M is a Swiss-made, compact, powered studio subwoofer that brings precision and low-frequency extension to your PSI Audio monitoring system. Engineered with Class G/H analog amplification and designed for perfect synergy with PSI A-series speakers, it delivers tight, detailed bass with reference-grade accuracy down to 28 Hz.

PSI Audio Sub A125-M Active Subwoofer

  • Compact & precise low-end – Extends frequency response down to 28 Hz without the coloration of typical subwoofers
  • Class G/H amplification – 150 W RMS / 225 W program power ensures dynamic headroom and control
  • Peak SPL up to 111 dB (1 m) – Powerful enough for professional studio and small room use
  • 100% analog signal path – Features CPR phase compensation and AOI adaptive impedance tech for tight, phase-aligned bass
  • Built to integrate – Enables seamless matching with A14‑M, A17‑M, A21‑M; acts as a mono sub or two units for midfield setups
Potential peak power

340 W

Continuous max SPL@1 m

104 dB

Short term max. SPL@1m

107 dB

Peak max. SPL@1m

111 dB

Signal to noise ratio (S/N)

103 dBA

Bandwidth at -6dB

28-90 Hz

SPL tolerances

 ±2.0 dB

Phase tolerances

 ± 45 (300 Hz – 500 Hz) deg

Dispersion (H x V)

80 x 35 deg

System

1 ways

Crossover frequency

3600 Hz

Woofer ext. diam.

210 (1x) mm

Dimensions W x H x D

320 x 480 x 385 mm

Net Weight

20.5 Kg

Warranty

5 (+1) years

The perfect low end in your studio

The low frequencies are where sound becomes tactile, engulfing listeners in a full-body experience. And while sheer power can certainly create a memory, a truly lasting impact can only be achieved with precision. The A125-M offers this very precision.

PSI Audio has translated its general approach of unaltered, maximum fidelity reproduction to the bass spectrum, allowing for a riveting experience that will change the way you work. Taking the guesswork out of the bass management, the A125-M grants an accurate representation of what is really going on “down below”. Take control and create a sonic wonderland that reaches throughout the entire spectrum with no insecurities and no need to double-check your work on a different system. Get a subwoofer you can trust.

This is not a subwoofer

At least not in the way most people think about subwoofers. In many cases, the leading questions that govern the development of a subwoofer are “how low can it go?” and “how loud can it go?” At PSI Audio, we did consider these questions, but we added a third one: “how precise can it go?” With typical subwoofers, all you get from the low end is some vague rumble. This can be impressive, but it is not particularly musical.


With the A125-M, you get the power and the depth, but you also get the punch, the transients, the speed and accuracy that you can expect from a PSI Audio product – which is why we like to think of our subwoofers as “low-frequency precision monitors”.

Sub A125-M – Who is it for?

Our low-frequency speakers are designed to perfectly complement our entire speaker range, making the A125-M the perfect addition to our smaller speakers A14-M, A17-M or A21-M.

Even with the larger systems, the A125-M can extend the low end and relax the main speakers, increasing overall performance. Basically, the A125-M is meant to support our monitor speakers when the bass needs more power and precision.

Extend the low frequencies and add power

Ranging down to 56 Hz, the A14-M already impresses with a lot of transparent bass reproduction for its size. By adding one of our subwoofers, you can turn a pair of A14-M into a proper full-range system with all the clarity and precision you desire.

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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