PSI Audio Sub A225-M


Active Subwoofer

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SKU: PSIA225MR Categories: , Brand:

An exceptional piece of acoustic design, the A225-M sub-woofer/bass extension is equally suited to use as a mono sub-woofer in a surround sound application or as a bass extension in a stereo system. Designed to work in harmony with the A225-M Sub, all PSI Audio ‘A’ series speakers feature a frequency response roll-off function that, when combined with the A225-M Sub, extends the frequency range down to an incredible 24 Hz, whilst maintaining a flat response.

The powerful class G outputs feature PSI Audio‘s unique “AOI” output stages, giving the A225-M an unprecedented impulse behavior. Each 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. To provide stability and avoid cabinet resonance A225-M is built with a double-box design, combining two cabinets into a single beautifully finished unit.

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.
  • Magnetically shielded for use close to video monitors.
  • Phase and amplitude response compatible with all PSI Audio monitors.
  • AOI Technology.
  • CPR Technology.
  • PSC Technology.

Technical Specifications

Power RMS: 200 W
Program Power: 300 W
Input Impedance: Sym, 10k Ohms
Sensitivity for 100 dB @ 1m: 0.775 V
Signal to Noise Ratio: 116 dBA
Continuous Max [email protected]: 111 dB (single)
Input Overload: 24 Vpp
Program Max [email protected]: 116dB / half space
Response at -6dB: 24 – 100 Hz
Tolerances: ±2 dB (28Hz – 65Hz)
Distortion THD: less than 1.5% (50Hz-200Hz)
System: 1 Way
Crossover frequency: 90Hz
Woofer’s dim. Ext. / Diaphragm: 2x 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 700 x 500
Gross / Net Weight: 43.1 / 38.4
Voltage: 115/230V (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

Additional information


Studio Red, Metal Black


2x 10"





Frequency Response

24Hz – 100Hz


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