PSI Audio Sub A125-M

The PSI Audio 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.


About this item



Compact accurate Subwoofer – PSI Audio Sub A125-M

“The combination of A14-M ​​and A125-M represents an extremely compact full-range interception system with outstanding imaging properties that make listening in the studio a pleasure and promises significantly less exhausting workdays.’ – Fritz Fey, Studiomagazin

Main Features

Power: 225W
Frequency Range: 28Hz – 100Hz
SPL Max: 106dB

100% Analog – No DSP
Flat frequency response
Phase compensated for a better stereo image
Class G Amplifiers
Built-in anti-resonance system in a double box cabinet
individually calibrated
Typical listening distance: from 1m
5 years warranty
Handmade in Switzerland

Sub A125-M – The most compact subwoofer of our range

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 an 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.


Power RMS150 W
Program Power225 W
Continuous Max SPL @ 1m106 dB (single)
Program Max SPL @ 1m111 dB (pair)
Response at -6dB28-90 Hz
Tolerances± 2.0 dB(31 Hz – 65 Hz)
Crossover frequency90 Hz
Woofer dim. Ext. /ø 258 mm /
Diaphragm mmø 210 mm
 Woofer dim. Ext. /ø 10.2 in /
Diaphragm inchø 8.3 in
Dimensions W x H x D mm320 x 480 x 380
Dimensions W x H x D inch12.6 x 18.9 x 14.9
Net Weight kg20.5 kg
Net Weight lbs45.1 lbs
Warranty5 years


There are no reviews yet.

Be the first to review “PSI Audio Sub A125-M”

Your email address will not be published. Required fields are marked *

This product was featured in our Installation projects


The Huntington Theatre Company is a famous non-profit performing arts organization located in Boston, Massachusetts. It was established in 1982 and has since developed into

Our mission at Parsons Audio is to provide solutions that help engineers, educators, musicians, studio, and venue owners realize their goals. When the owners of

2022 has been a busy year for us here at Parson’s Audio. We’ve been busy doing sound system installations all over New England. The Groton

Different Solutions For You


Professional Installation Services

Flawless audio systems for studios and venues


Audio Solutions for Education

Elevate learning experiences with tailored audio solutions


Outstanding Video Solutions

Visual experiences with state-of-the-art video technology