An exceptional piece of acoustic design, the PSI Audio 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 PSI Audio A225-M Sub, all PSI Audio ‘A’ series speakers feature a frequency response roll-off function that, when combined with the PSI Audio 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
  • Designed for stereo and multichannel monitoring
  • Phase and amplitude response compatible with all PSI Audio monitors.
  • Built in anti-resonance system in a double box cabinet.
  • Protection circuits with overload indicator.
  • Magnetically shielded for use close to video monitors.
  • Flat frequency response
  • Real balanced input with outputs for satellite systems.
  • Class G low temperature amplifier stage.
  • Amplifier unit acoustically uncoupled from speaker cabinet
  • CPR, AOI, PSC*
Technical Details
Dimensions cabinet W x H x D mm 320 x 700 x 500
Gross / Net Weight 43.1 / 38.4
Response at -6dB 24 – 120 Hz
Continuous Max SPL, 1m 111 dB (single)
Program Max SPL, 1m 116dB / half space
Woofer’s dim. Ext. / Diaphragm 2x Ø 258 mm / Ø 210 mm