Monitor Audio IA125-4 4-Channel Installation Amplifier

The Monitor Audio IA125-4 is a compact four-channel installation amplifier built for custom residential and commercial audio projects. Whether you're powering a pair of ceiling speakers in a kitchen, feeding Dolby Atmos height channels, or driving a whole-home multi-zone system, this half-rack unit packs serious flexibility into a small footprint, making it a great match for our ceiling speaker ranges.

Why we like it

• Four channels rated at 125W each, with 2 x 250W bridged operation for demanding zones
• Power Sharing mode lets you direct up to 250W per channel where it's needed most
• Ultra-compact 1U half-rack chassis saves space in AV cabinets and comms cupboards
• Signal-to-noise ratio above 106dB and THD+N below 0.05% for clean, accurate sound
• Full protection suite (short-circuit, DC, undervoltage, over-temperature, overload) for worry-free installation

Installation notes

Housed in a space-saving 1U half-rack format, the IA125-4 suits rack-mounted AV cupboards as well as wall or desktop positioning, with a rack mount kit available separately. It pairs well with Monitor Audio in-ceiling and in-wall speakers for multi-zone or home cinema height channel applications, and supports 70V/100V operation when bridged for larger distributed audio runs. A high-efficiency switch mode power supply with Power Factor Correction keeps running costs and heat output low, with standby consumption under 0.5W.

Specifications