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Monitor Audio IA125-4 CI Amplifier

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Original price $3,199.00 - Original price $3,199.00
Original price
$3,199.00 - $3,199.00
Current price $3,199.00

Monitor Audio IA125-4 CI Amplifier

Limited stock available.

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.

Key Features

  • 4 x 125 W/2 x 250 W
  • Fully customisable DSP amplifier with web configurator
  • Half width 1U rack format allows unique installation opportunities or high power density depending on how the product is mounted
  • High performance Class D amplifiers ensure excellent power and sound delivery
  • Power Sharing technology
  • Supports 70/100V line level speakers

Optional Add on: 

Monitor Audio Installation Amplifier Mounting Kit

Designed for use with the IA125-4 and IA60-4 only

These rack mounting and desk/wall mounting components are not supplied with the half rack models, but are available to purchase separately.

Half rack Installation Amplifier models can be configured for rack installation using one standard rack ‘ear’ and one half-rack extension piece.  Multiple half rack Installation Amplifiers can also be secured side by side using accessory connecting plates.

If not installed in an equipment rack, Installation Amplifiers can be placed free- standing on a flat surface. Adhesive rubber feet are supplied for this purpose. Installation Amplifiers can also be attached to the underside of desks or wall mounted using connecting plate hardware. The adhesive rubber feet should also be used in these circumstances to minimise the possibility of vibration between the amplifier and mounting surface. Wall and desk mounting is also illustrated.

Providing sufficient airflow

The installation and equipment rack should be configured to provide appropriate ventilation airflow space around the sides and rear of the amplifier, please refer to the next section below. Ventilation airflow space of at least 25 mm (1”) should be maintained along at least one side of the amplifier at all times. Ventilation apertures are also located on the rear panel of the amplifier and must not be obstructed. It is important to retain at least 80 mm (3”) free space for airflow behind the amplifier rear panel. 



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 250 W
Power Consumption:  150 W​
Thermal Output:  512 BTU
Polarity (Default):  Non-inverting
Dimensions:  44 x 220 x 325 mm​ (13/4 x 811/16 x 115/8")
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 seperatly)
Power Ratings​:  1% THD @ 120Vac and 230Vac​
Cabinet Finish:  Black Anodised
* SE - Single Ended
** BTL - Bridge Tied Load
*** BTU - British Thermal Unit

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