The Adastra RM4460 installation amplifier distributes audio across four independent zones, with separate level control for each output. Its four Class-D amplifiers deliver up to 60 W per channel and support 100 V or low-impedance 4 or 8 Ω speakers. The built-in media player plays files from USB, receives FM radio stations and connects via Bluetooth 5.0.

Inputs include a paging microphone with Vox function, two balanced microphone or line inputs with switchable phantom power, and one line or media player input. Channels 1–3 have bass and treble controls, while 24 V contacts allow inputs 2–4 to be muted in the event of an alarm. Designed for installation in a 19-inch rack, it supports an optional CS4 call station for selecting the paging zone.

• Type: Integrated installation amplifier
• Input channels: 4
• Output zones: 4 independent
• Output power: 4 × 60 W RMS
• Amplifier technology: Class-D
• Speaker impedance: 4 or 8 Ω or 100 V
• Audio sources: USB, FM and Bluetooth 5.0
• Microphone inputs: One paging input and two microphone/line inputs
• Line input: RCA or screw terminal
• Input connections: 3 × XLR, 1 × RCA/screw terminal, RJ45 and 3.5 mm Aux
• Output connections: 4 × 100 V, 4 × 4 Ω and 4 × RCA line-level
• Tone control: Bass 100 Hz ±10 dB and treble 10 kHz ±10 dB on channels 1–3
• Phantom power: +20 V, switchable on inputs 1–3
• Alarm mute contacts: 24 V, for inputs 2–4
• Protection: Short-circuit, overload and overheat protection
• Dimensions: 482 × 283 × 43 mm
• Weight: 6.85 kg