The Monitor Audio IA125-4 is a compact yet exceptionally powerful four-channel installation amplifier designed for high-performance residential and commercial audio systems. Delivering 4 x 125W in single-ended mode, 2 x 250W bridged, or up to 2 x 250W in Power Sharing mode, the IA125-4 offers outstanding flexibility for multi-room audio, home cinema and outdoor entertainment installations.
Housed in a space-saving 1U half-rack chassis, the IA125-4 provides ultra-high-density amplification without compromising audio quality. It is particularly well suited to driving Monitor Audio's architectural loudspeakers, height channels in Dolby Atmos systems, medium-sized garden audio zones and even demanding applications such as Monitor Audio Cinergy THX Ultra-certified speaker systems.
Despite its compact footprint, the IA125-4 delivers substantial power output across four independent amplifier channels.
The IA125-4 offers advanced Power Sharing capabilities, allowing available amplifier power to be allocated where it is needed most.
This flexibility makes the IA125-4 particularly suitable for driving larger architectural speakers and demanding home cinema installations.
The amplifier is designed to support a wide variety of installation scenarios, from distributed audio systems through to immersive home cinema environments.
Built for critical listening applications, the IA125-4 delivers low noise, low distortion and highly accurate sound reproduction.
Multiple integrated protection circuits ensure safe and reliable operation in professional installations.
A high-efficiency switch mode power supply with Power Factor Correction delivers reliable performance while minimising power consumption and heat generation.
Designed specifically for custom installation environments, the IA125-4 maximises rack efficiency while providing flexible mounting options.
| Amplifier Channels | 4 |
|---|---|
| Output Power (SE) | 4 x 125W |
| Output Power (BTL) | 2 x 250W |
| Power Sharing | Up to 2 x 250W |
| 70V / 100V Output | 2 x 250W BTL |
| Power Consumption | 150W |
| Thermal Output | 512 BTU |
| Polarity | Non-Inverting |
| Output Voltage | 70Vp / 140Vpp (SE), 140Vp / 280Vpp (BTL) |
| Signal-to-Noise Ratio | >106dB (A-weighted) |
| THD+N | <0.05% |
| Frequency Response | 20Hz - 20kHz (+0/-0.25dB) |
| Protection Circuits | Short Circuit, DC, Undervoltage, Temperature & Overload |
| Power Supply | SMPS with Power Factor Correction |
| Operating Voltage | 100-240V AC, 50/60Hz |
| Standby Consumption | <0.5W |
| Dimensions (H x W x D) | 44 x 220 x 325mm |
| Finish | Black Anodised |
Ideal for multi-room audio systems, premium residential installations, Dolby Atmos home cinema systems, outdoor entertainment zones, architectural speaker installations and Monitor Audio Cinergy home cinema projects requiring compact yet powerful amplification.
Combining powerful four-channel amplification, advanced Power Sharing technology, compact rack-friendly dimensions and exceptional audio performance, the IA125-4 provides a flexible installation solution for modern home cinema and distributed audio systems where space, efficiency and sound quality are equally important.
The amplifier delivers 4 x 125W in standard operation, 2 x 250W in bridged mode and supports Power Sharing up to 250W per channel.
Yes. Its compact size and four-channel architecture make it ideal for powering height channels in Dolby Atmos and immersive home cinema systems.
Absolutely. The IA125-4 is commonly used to power medium-sized garden audio systems and outdoor entertainment areas.
Power Sharing allows amplifier power to be dynamically allocated to channels that require greater output, providing additional flexibility for demanding loudspeaker applications.
Yes. Optional rack mount and wall/desktop mounting kits are available separately, allowing flexible installation options.
