Adastra RMD Series 100V 4 Zone Mixer Amplifier with DAB+, BT, USB/SD

The Adastra RM Series 100V Mixer-Amplifier is a 5-channel, 19" rack-mountable unit built for commercial sound installations — available in 60W, 120W, 240W, 360W, and 480W output options to suit installations of any scale.

Designed to drive 100V line speaker systems or standard 4–16 Ohm speaker loads, this unit covers the full range of background music and public address requirements in retail, hospitality, education, and corporate environments.

Built-in sources include a DAB+/FM tuner, Bluetooth 5.0 receiver, and a front-mounted USB/SD media player, so there is no need for external playback equipment. A switchable voiceover (VOX) function automatically ducks the background music whenever a signal appears on microphone input 1, making it ideal for paging and announcement systems. Rear-panel 24V emergency mute contacts allow all inputs except mic 1 to be silenced instantly when triggered — a key requirement in many commercial and public venues.

Outputs are managed across four independently switchable 100V zones plus one unswitched output, keeping priority alert speakers always active. The XLR mic input carries switchable +20V phantom power for condenser microphones, and the rear panel offers individual mic/line switching for inputs 2 and 3.

• Scalable Power Output: Available in five power ratings from 60W to 480W, so you can match the amplifier to the size and demands of the installation.
• DAB+/FM, Bluetooth & USB/SD: Three built-in audio sources mean background music can be played without any additional equipment.
• 5-Channel Mixing: XLR mic input with phantom power, two mic/line jack inputs, and two RCA line inputs give flexible source management across a range of input types.
• 4-Zone Switched Outputs: Four independently switched 100V line outputs plus one unswitched output allow zone-by-zone control across the installation.
• VOX Voiceover: Background music automatically lowers when mic input 1 is active, enabling seamless live announcements without manual intervention.
• Emergency Mute: 24V rear-panel contacts mute all inputs except mic 1 when triggered, supporting life safety and emergency announcement requirements.
• Dual Power Supply: Can be powered from mains 230 Vac or 24 Vdc, providing flexibility for installations with backup power systems.
• 19" Rack Mountable: 2U rack-mount format with rack ears supplied as standard, ready for integration into a standard equipment rack.

• Brand: Adastra
• Model: RM Series (RM60D / RM120D / RM240D / RM360D / RM480D)
• Output Power (RMS): 60 W / 120 W / 240 W / 360 W / 480 W (variant dependent)
• Speaker Outputs: 4 switched + 1 non-switched 100V / 4–16 Ohms / COM
• Inputs: 1 × XLR mic (balanced), 2 × mic/line jack, 2 × RCA line
• Input Sensitivity (Mic 1): -53 dBV
• Input Impedance (Mic 1): 5k Ohms
• Input Sensitivity (Line): -15 dBV (-18.5 dBV line 5)
• Input Impedance (Inputs 2–5): 1k Ohms
• Line Output: RCA
• Phantom Power: +20V switchable (XLR mic input 1)
• Bluetooth Version: 5.0
• Audio Sources: DAB+/FM tuner, USB/SD player, Bluetooth receiver
• Equaliser: Bass 100 Hz ±10 dB / Treble 10 kHz ±10 dB
• THD: <1.0%
• Emergency Control: 24V contacts — mutes all except Mic 1 when triggered
• Mains Power Supply: 170–264 Vac, 50 Hz (IEC)
• DC Power: 24 Vdc (screw terminals)
• Fuse: T2A
• Rack Format: 2U 19" (rack ears supplied)
• Dimensions (W × H × D): 433.0 × 88.0 × 320.0 mm
• Weight: 4.98 kg

• 1 x Amplifier
• 1 x Power Lead
• 2 x Rack Mounting Ears