Ashly FA125.4 Four-Channel Install Amplifier

The FA125.4 puts four channels of 125 W Class D amplification into a half-rack chassis, which is the density that lets one box cover a whole small room without a rack to hide it in.

Channels share power in pairs, up to 250 W per pair, so an uneven load split across two zones is a design choice rather than a problem, and a single driven channel can take the full 250 W. Each output switches between Low-Z at 4 or 8 ohms and Hi-Z at 70 or 100 V, so paging lines and low-impedance speakers can live on the same amplifier. Cooling is active and quiet, and mounting hardware is included for rack or surface installation.