PSI Audio A125-M Sub

PSI Audio’s world famous low end – now in a compact subwoofer.

Using the same exceptional acoustic design as its older brother, the A225-M, the brand new PSI Audio A125-M subwoofer is able to deliver PSI’s no compromise low end in a smaller cabinet. All PSI Audio ‘A’ series speakers feature a 10dB frequency response roll-off function that, when combined with the PSI Audio A125-M Sub, extends the frequency range down to an incredible 28 Hz whilst maintaining a flat response.

100% Analogue Technology

It achieves this by implementing the same analog technology that PSI Audio is revered for, including class G amplification featuring PSI Audio’s unique ‘AOI’, Adaptive Output Impedance technology at the output stages ensuring unprecedented impulse behaviour. Not to mention their ‘CPR’, Compensated Phase Response analogue technology. Thanks to the CPR system, the placement of sound in the actual sound space is perfectly accurate. This technology allows designing a sound system with different types of PSI Audio speakers seamless whilst maintaining a perfectly accurate phase response.

Equipped with a single 25cm driver in a double wooden cabinet, the driver and amplifier unit is secured by a protection circuit, which is monitored by a red LED on the front panel. The electronics are housed in a unit mechanically isolated from the speaker cabinet to avoid resonance at high sound pressure levels.

Extend the low frequencies of your A14-M, A17-M or A21-M

Whether you require a sub for your surround sound setup or simply want to extend the low end in your stereo setup the PSI Audio A125-M is the perfect addition. With an SPL of 111dB of the A125-M is adapted to work with PSI Audio’s smaller monitors such as the A14-M, A17-M or even the A21-M. However two of them will also work in stereo with the larger models such as A21-M and A25-M monitors providing the ultimate monitoring setup.


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 multi-channel monitoring
  • Phase and amplitude response compatible with all PSI Audio monitors.
  • AOI Technology
  • CPR Technology
  • PSC Technology
Technical Specifications
  • Power RMS: 150W
  • Program Power: 225W
  • Input Impedance: Sym, 10k Ohms
  • Sensitivity for 100dB @ 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: 111bD / half space.
  • Response at -6dB: 28 – 90Hz
  • 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 Standy-Quiescent-Max: 1.7 – 4 – 200W
  • Mean / Max Humidity: less than 75% / less than 90%
  • External Temperature: 5 – 40°C
Check out the rest of the PSI Audio family.

PSI A14-M Studio




PSI A225-M Sub