DAS Audio Integral A404 4-Channel Install Amplifier

The Integral A404 is a four-channel, 1U Class D amplifier for permanent installation work. Its universal switching supply and auto-standby circuit cut power draw whenever the system is idle. Each channel delivers 100 W into 4 ohms, and channel pairs can be bridged for 2 x 200 W feeding 70V or 100V distributed lines.

Connections are euro-block terminal blocks for signal in and speaker out, with an IEC AC inlet. A rear switch sets stereo or bridge operation per pair and can engage an 80 Hz, 12 dB/octave high-pass filter. Front LEDs show power, protect/standby state and signal/clip per channel for at-a-glance rack diagnostics.