Sub A125-M – Compact accurate subwoofer

All the precision of famous PSI Audio low end now in a compact Subwoofer

Product Description

PSI Audio now extend their range of products with a small-sized subwoofer, the A125-M, that is designed to extend the bandwidth of their monitors down to 28 Hz.
All of PSI Audio monitors have a roll-off that reduces low frequencies by up to 10 dB. Their subwoofers are designed to seamlessly extend the frequency of any PSI Audio monitor. This means that the monitors, with roll- off, and subwoofers are perfectly in phase and that the total frequency response is flat.

The SPL of the A125-M is adapted to work with PSI Audio’s smaller monitors such as A14-M, A17-M (see photo) or even the A21-M. Two of them will also work in stereo with the larger models such as A21-M and A25-M.
The dimensions are 32 x 38 x 48 cm and it weighs 21 kg. It is equipped with a single 25 cm driver in a double wooden cabinet driven by PSI Audio’s class-G amplifier and analogue technology.

Product Key Features

  • Built in anti-resonance system in a double box cabinet.
  • Class G low temperature amplifier stage.
  • Amplifier unit acoustically uncoupled from speaker cabinet.
  • Real balanced input with outputs for satellite systems.
  • Protection circuits with overload indicator.
  • Designed for stereo and multichannel monitoring.
  • Phase and amplitude response compatible with all PSI Audio monitors.
  • AOI Technology.
  • CPR Technology.
  • PSC Technology.

Product Documents

Sub A125-M Technical Data:   PSI_A125_M

User Manual:  UserManual_5_0

Brochure: PSI Audio Brochure 2015

Product Data


Power RMS: 150 W
Program Power: 225 W
Input Impedance: Sym, 10k Ohms
Sensitivity for 100 dB @ 1m: 0.775 V
Signal to Noise Ratio: 116 dBA
Continuous Max SPL@1m: 106 dB (single)
Input Overload: 24 Vpp
Program Max SPL@1m: 111dB / half space
Response at -6dB: 28 - 90 Hz
Tolerances: ±2 dB (31Hz - 65Hz)
Distortion THD: less than 1.5% (50Hz-200Hz)
System: 1 Way
Crossover frequency: 90Hz
Woofer's dim. Ext. / Diaphragm: 1x Ø 258 mm / Ø 210 mm
Connectors: 2 x XLR F / 2 x XLR M
Signal input: 1=GND, 2=(+), 3=(-)
Material: MDF / double box
Dimensions W x H x D mm: 320 x 480 x 385
Gross / Net Weight: 20.5 / 23.6
Voltage: 115/230V±10% (50-60Hz)
Consumption Standby-Quiescent-Max: 1.7 - 4 - 200 W
Mean / Max Humidity: less than 75% / less than 90%
External Temperature: 5 - 40°C

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