The Adastra AD-RM406 installation amplifier is a Class D mixer amplifier with 6 independent output zones, 6 x 40 W of power and operation at 100 V or 4/8 Ohms. Microphone and line inputs, an auxiliary input, and built-in USB/SD/FM playback with a Bluetooth receiver support use in multi-room systems with different audio sources.

Each input signal can be routed independently to any zone. Mic 1 features priority, while the microphone inputs support switchable +20 V phantom power. The chime signal can be used for paging calls and announcements, while each zone can be monitored through the front-panel headphone output with volume control.

• Type: Integrated installation mixer amplifier
• Amplifier class: D
• Output power: 6 x 40 W
• Output voltage: 100 V or 4/8 Ohms
• Zones: 6 independent
• Inputs: 3 microphone/line (XLR/jack), 1 auxiliary with 2 RCA connectors
• Audio playback: USB, SD, FM, Bluetooth
• Zone line outputs: 6 x RCA (mono)
• Speaker outputs: 6 terminals: 100 V/8 Ohms/4 Ohms/Com
• Headphone output: 6.3 mm jack with volume control
• Monitor outputs: 6.3 mm jack and 2 RCA line outputs
• Phantom power: +20 V, switchable for each XLR input
• Mute contacts: 24 V relay
• Frequency response: 100 Hz–24 kHz
• THD: <0.76% at 1 kHz
• Input impedance: 1 kOhm (microphone/line)
• Input sensitivity: -11 dB (line), -46 dB (microphone)
• Signal-to-noise ratio: 84 dB (line), 82 dB (microphone)
• Bluetooth version: 2.0
• Dimensions: 433 x 89 x 403 mm
• Weight: 11 kg
• Power supply: 170–264 Vac, 50 Hz (IEC)