IA125-4 -4-Channel Installation Amplifier

Superior power for your home cinema or multi-room installation

The IA125-4 is a deceptively powerful amplifier that delivers ultra-high-density amplification in a compact 1U half-rack design. It provides 4 channels of 125 W or 2 channels of 250 W, offering exceptional flexibility for custom installations.

With its power-sharing mode, the IA125-4 can drive Monitor Audio THX® Ultra-certified Cinergy 100 speakers in a home theater or medium-sized outdoor space. It’s also an ideal solution for two-zone stereo systems and height channels in home cinema applications.

Note: Rack and wall/desk mounting kits sold separately.

Channels

• 4

Output Power @ 4 Ω / 8 Ω

• 4 × 125 W (SE)

Output Power @ 70 V / 100 V

• 2 × 250 W (BTL)

PowerShare (up to)

• 2 × 250 W

Power Consumption

• 150 W

Thermal Output

• 512 BTU

Polarity (default)

• Non-inverting

Overall Dimensions (H × W × D)

• 44 × 220 × 325 mm

(1 3/4 × 8 11/16 × 12 5/8 in)

Output Voltage

• 70 Vp / 140 Vpp (SE, unloaded)
• 140 Vp / 280 Vpp (BTL, unloaded)

Signal-to-Noise Ratio

• >106 dB (A-weighted, 20 Hz – 20 kHz, 8 Ω load)

THD + N (typical)

• <0.05% (20 Hz – 20 kHz, 8 Ω load, 3 dB below rated power)

Frequency Response

• +0 / –0.25 dB, 20 Hz – 20 kHz

(8 Ω load, 3 dB below rated power)

Protection Circuits

• Short circuit
• DC
• Undervoltage
• Temperature
• 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, 50–60 Hz

Standby Consumption

• <0.5 W

Accessories

• Rack mount kit
• Wall / desktop mount kit (sold separately)

Power Ratings

• 1% THD @ 120 Vac and 230 Vac

Cabinet Finish

• Black anodised

Warranty

• 5 years

* SE = Single Ended

** BTL = Bridge Tied Load

*** BTU = British Thermal Unit

• Ultra-high-density amplification in a compact 1U half-rack design
• 4 × 125 W or 2 × 250 W output for flexible system configuration
• Power-sharing mode for higher-output applications
• Ideal for THX® Ultra–certified Cinergy 100 speakers
• Suitable for home theater, height channels, and two-zone stereo systems
• Reliable performance for residential and light commercial installations
• Optional rack and wall/desk mounting kits (sold separately)