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Type: IA125-4

  • Monitor Audio 4 channel 125 Watt amp

This compact, ultra-high power density DSP amplifier delivers four channels of 125 W or two channels of 250 W. All from a convenient 1U half-size design.

The IA125-4 is a deceptively powerful amplifier that packs ultra-high-density amplification into its compact 1U half-rack form. It delivers 4-channels of 125 W or 2-channels of 250 W. Plus, it can be used in power sharing mode to support Monitor Audio’s THX Ultra certified, Cinergy 100 speakers within a home theatre system or medium sized garden. It’s the ideal amplifier for two zone stereo applications and height channels within home theatre systems.


  • Channels:  4
  • Output Power @ 4 Ohms/8 Ohms:  4 x 125W SE
  • Output Power @ 70/100V:  2 x 250 BTL
  • Poweshare (up to):  2 x 250W
  • Power Consumption:  150 W
  • Thermal Output:  512 BTU
  • Polarity (Default):  Non-inverting
  • Dimensions:  44 x 220 x 325 mm​ 
  • Output Voltage​:  70Vp / 140Vpp (SE unloaded), 140Vp / 280 Vpp (BTL unloaded)
  • Signal to Noise Ratio:  >106dB (A-weighted, 20 Hz – 20 kHz, 8 Ohm load)​
  • THD+N (typical)​ <0.05% (20 Hz – 20 kHz, 8 Ohm load, 3db below rated power)​
  • Frequency Response:  +0/-0.25dB 20Hz - 20kHz (8 Ohm load, 3dB below rated power)
  • Protection Circuits:​ Short circuit -, DC, Undervoltage -, Temperature – and Overload protection​
  • Power Supply:​ Switch mode power supply with Power Factor Correction (PFC) and standby converter
  • Operating​ Voltage/Frequency:  Universal Mains, 100 V – 240 V, 50 Hz – 60 Hz​
  • Standby Consumption​ :<0.5 W
  • Accessories:  Rack Mount Kit, Wall/desktop mount kit (sold seperatley)
  • Power Ratings:​ 1% THD @ 120Vac and 230Vac​
  • Cabinet Finish:  Black Anodised