Sub A225-M

Full range accurate Subwoofer

“The real trick is to simultaneously provide a pure neutral processed signal and bypass all the obstacles on the road to obtain it.” 

“PSI Audio staff challenged laws of physics and mechanical constraints. Engineers from the company PSI Audio mastered this art.”
Estrada iStudio!, Poland

Main Features

Power: 300W
Frequency Range: 24Hz – 100Hz
SPL Max: 111dB
100% Analog – No DSP
Flat frequency response
Phase compensated for a better stereo image
Class G Amplifiers

individually calibrated
Typical listening distance: from 1m
5 years warranty
Handmade in Switzerland

Add control on your surround setup or on low frequencies

If you use a surround system or are working with several different speakers, our R&B – Router & Bass management System – could save you a lot of time.

R&B is an 8 in / 8 out transparent matrix that will fit into A225-M and help you selecting the speakers you are working with.

Please note that R&B is an option for the Sub A225-M and is not included as standard.

More information

Sub A225-M – Powerful and accurate subwoofer

Don’t think of a subwoofer, think of adding an extra low frequency way to your monitor.

Our SUBs are designed and calibrated to seamlessly extend the low-end of any of our loudspeakers and with and overall flat frequency and phase response. The result is remarkable when reproducing low frequency acoustic instruments. The tight, accurate, perfectly controlled bass allows hearing all details down to 28 Hz and even down to 24 Hz with our larger model.

PSI Audio program includes 2 subwoofers / Low Frequency Extensions that excel in accuracy and fit the whole range of PSI Audio monitors:
Sub A125-M is a compact subwoofer and perfectly fits the A14-M or A17-M. Two units perfectly fit the A21-M. It extends the frequency down to 28 Hz.
Sub A225-M is a powerful subwoofer and perfectly fits the A21-M and two units perfectly fit A25-M. It extends the frequency down to 24 Hz.

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

Technical Data & Documents

Product A225-M
Power RMS200 W
Program Power300 W
Continuous Max SPL @ 1m111 dB (single)
Program Max SPL @ 1m116 dB (pair)
Response at -6dB24-100Hz
Tolerances± 2.0 dB(28 Hz – 65 Hz)
Phase tolerances
(P.N. 4-16 kHz) at -6 dB
Crossover frequency90 Hz
Woofer dim. Ext. /2x ø 258 mm /
Diaphragm mmø 210 mm
 Woofer dim. Ext. /2x ø 10.2 in /
Diaphragm inchø 8.3 in
Medium dim. Ext. /
Diaphragm mm
Medium dim. Ext. /
Diaphragm inch
Tweeter dim. Ext. /
Diaphragm mm
Tweeter dim. Ext. /
Diaphragm inch
Dimensions W x H x D mm320 x 700 x 500
Dimensions W x H x D inch12.6 x 27.7 x 19.9
Net Weight kg35.6 kg
Net Weight lbs78.3 lbs
Warranty5 years


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

On special request, we can customize your speaker with any RAL color.
Please ask us directly.

What our users say

The Sub A225 brings a relief, a natural depth to the A21, thus making the decomposition of the plans that make up an incredibly intuitive mix.
Jean-Jacques Blondeau, Schizoid Sound Studio (