Monitor Audio IA125-4 Four Channel 250W Installation Amplifier

The Monitor Audio IA125-4 is a high-performance, ultra-compact 4-channel amplifier designed for custom installation projects where space is limited, but power and flexibility are essential. Ideal for driving in-ceiling, in-wall, or bookshelf speakers in residential or light commercial setups, it’s the perfect solution for installers seeking a reliable and efficient amplification system.

With its half-rack width design and versatile mounting options, the IA125-4 fits neatly into tight spaces, AV racks, or hidden locations. Despite its compact size, it delivers powerful Class D amplification, DSP configuration, and even IP control for seamless integration into wider systems—making it an excellent fit for smart home environments.

FEATURES

• Compact Half-Rack Design: Saves valuable space in AV racks and cabinets, perfect for tight installations.
• Powerful Class D Amplification: Delivers 4 x 125W at 4 ohms, ensuring dynamic and clean audio performance across multiple zones.
• Versatile Configuration Options: Offers bridgeable outputs and DSP presets to match speaker requirements and room acoustics.
• Ethernet Control and Monitoring: Integrates easily into smart systems with IP control and web-based UI for remote configuration and diagnostics.
• Energy Efficient with Auto Standby: Reduces power consumption when not in use, meeting eco-conscious installation demands.
• Rack-Mountable with Optional Accessories: Can be paired with Monitor Audio’s rack mount kit for tidy professional installations.
• Ideal for Multi-Room Audio: Designed to drive multiple zones with independent channel control for tailored sound experiences throughout the home.
• Silent Fanless Operation: Ensures quiet performance, suitable for use in living spaces or noise-sensitive environments.
• Thermal and Overload Protection: Built-in safety features extend the life of both the amplifier and connected speakers.
• Compatible with Monitor Audio Systems: Optimised for use with Monitor Audio architectural speakers for consistent performance and tone.

What You Get

• 1 x Amplifier Unit
• 1 x Mains Power Lead
• 1 x Connectors Set
• 4 x Adhesive Feet

Specifications

• Channels: 4
• Output Power @ 4 Ohms/8 Ohms: 4 x 125W SE*
• Output Power @ 70/100V: 2 x 250W 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 / 280Vpp (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 separately)
• Power Ratings: 1% THD @ 120Vac and 230Vac
• Cabinet Finish: Black Anodised
• Warranty: 5 years