Adastra Amplifiers

Choose a mixer amplifier when the system needs its own microphone inputs and music player, and a slave amplifier when it needs more power from a source you already have. The UM Series 953.179UK mixes inputs and plays USB, FM and Bluetooth, while the RS Series 953.202UK slave takes a line feed from a mixer and adds 240W.

Yes. US Series slaves such as the 953.196UK and RS Series slaves such as the 953.203UK have a 100V input on removable screw terminals, so they can connect in parallel with existing 100V speakers or a long 100V feed and drive further speakers. RS slave outputs can also cascade onto more RS units for a larger system.

A stereo PA amplifier. The A2 953.402UK is rated 2 x 200W RMS and takes two 8 ohm speakers per channel on 4mm binding posts, with USB/SD, FM and Bluetooth sources. The compact A22 953.422UK, rated 2 x 55W max, has an IR remote control and brackets for fixing under a counter or on a wall.

It is a stereo amplifier in a compact housing that installs into a wall or ceiling, so no shelf or cabinet space is needed. IWA models such as the 953.081UK (2 x 15W) and 953.085UK (4 x 15W) fit cavity walls and ceilings and take Bluetooth, optical digital and 3.5mm Aux inputs. The WA-215 953.137UK set adds a pair of 15W ceiling speakers.

Yes. The S260-WIFI (2 x 60W) and S460-WIFI (4 x 60W) stream over WiFi or a wired LAN under the control of Android or iOS apps, and keep streaming after the phone disconnects. The S460-WIFI sets separate volumes for two areas, and Smart Pack Multiroom sets such as the 300.103UK add ceiling speakers.

It drives a cable loop laid around a room, and hearing aids switched to the T position pick up the sound directly. The LA-300 MK2 and LA-600 MK2 have per-input mic/line and phantom power switches, tamper-proof controls and adjustable metal loss correction, and the 952.867UK has 600m² area coverage.

Use a multi-zone model. The RMS-series 953.152UK has 5 independent 60W 100V channels with a line input per channel, and the 953.154UK has 2 x 120W. The A-series 953.408UK has a stereo source selector per zone and 2 microphone inputs, and the RM406 953.160UK has 6 x 40W zones with variable mic priority and a chime.

Smart Pack and background music packages combine an amplifier with matched speakers. The BC3 package 300.004UK pairs an A22 amplifier with 4 black 3in wall speakers and 10m of cable, the 300.106UK Smart Pack Small pairs a DM25 mixer amplifier with 4 flush-mounted ceiling speakers, and the 300.104UK Smart Pack Outdoor2 pairs a compact stereo amplifier with 2 IP44 wall speakers.

Yes, where it has a 24V mute terminal. The RS Series 953.201UK slave accepts a 24V signal from a security or alert panel to mute its output, and the RMS-series 953.152UK has a 24V terminal that an alarm panel can use for emergency evacuation override. Wire the terminal to the fire panel relay as the system design specifies.