Outline ISA4D32 4-Channel Amplifier 4 x 600 W @ 4 Ω
The Outline ISA4D32 is a high-performance installation amplifier that delivers formidable power, pristine audio quality and proven reliability in a single rack unit. Built around Outline’s patented Smart Rails Management (SRM) technology, it offers class-leading efficiency, global mains compatibility and intelligent DSP control—everything today’s integrators need for mission-critical audio systems.
Unmatched Power Density
With up to 800 W per channel into 2 Ω—or 4 × 600 W into 4 Ω—the ISA4D32 drives main loudspeakers, distributed systems or subwoofers with ease. Bridge two channels for 1.6 kW at 4 Ω when extra headroom is required, all while occupying just 44.5 mm of rack space and weighing only 7 kg.
Global-Ready & Energy-Efficient
A universal, power-factor-corrected supply accepts 90–264 VAC and tolerates peaks up to 400 VAC, ensuring stable performance anywhere in the world. SRM continuously adapts rail voltages to the programme material, reducing heat and power draw without sacrificing dynamic range—perfect for venues focused on sustainability and lower operating costs.
Comprehensive DSP & Remote Monitoring
On-board 24-bit Tandem™ converters and a 32-bit floating-point DSP engine provide linear-phase FIR crossovers, parametric EQ, delay and advanced TruePower™ limiters. Forty-nine amplifier snapshots plus unlimited speaker presets streamline system commissioning. A secondary low-power supply keeps the network interface live even in deep-sleep, allowing health checks and control at any time.
Versatile Output Architecture
The ISA4D32 effortlessly handles low-impedance loads down to 2 Ω as well as 70 V or 100 V distributed lines. Combine hi-Z and lo-Z outputs on the same frame to cover theatres, houses of worship, retail spaces, cruise ships and more with a single amplifier platform.
- 4 × 600 W @ 4 Ω or 800 W @ 2 Ω
- 1-RU, 7 kg installation-optimised chassis
- Universal PFC power supply 90–264 VAC
- Smart Rails Management for ultra-low consumption
- Lo-Z/70 V/100 V compatible outputs
- Advanced 24-bit DSP with FIR/IIR processing
- Network control & monitoring even in standby


