Purpose-Built for System Clarity and Control

The ARC Audio Cu 4.4 is a 4-channel reference amplifier built for high-end system design where channel precision and sonic accuracy matter most. Housed in a brushed copper and satin silver chassis, it’s as beautiful on the outside as it is advanced within — with gold-plated terminals, microprocessor-managed internal cooling, and force-flow thermal architecture to keep performance consistent and reliable under pressure.

Inside, the Cu 4.4 features ARC’s ULF (Ultra-Low Feedback) circuit design to reduce distortion and maintain signal integrity from input to output. TTB (Thermal Tracking Bias) continuously adapts to the amplifier’s thermal conditions in real time, preserving tonal accuracy across demanding playback without the instability of fixed-bias circuits.

Whether used to power a full set of components, run in 3-channel mode (tweeter, mid, and bridged midbass), or even bridged for high-output stereo duty, the Cu 4.4 offers flexible configuration without compromising clarity. It's also favored by top-tier system designers using multiple Cu 4.4s to achieve complete left/right isolation and unmatched imaging.

With a built-in crossover bypass switch, the Cu 4.4 is a perfect match for ARC Audio’s Pro-Series DSPs or other high-resolution signal sources. Clean, compact, and surgically precise — the Cu 4.4 gives you total control without coloring the music.