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Summary of Contents for Adastra A22
- Page 1 Item ref: 953.422UK User Manual Class-D Compact Music Amplifier Version 1.0 Caution: Please read this manual carefully before operating Damage caused by misuse is not covered by the warranty...
- Page 2 Introduction Thank you for choosing the A22 to power your sound system. This compact digital amplifier has been designed to provide a flexible background music and public address solution in a discreet and easy-to-use format. Please read and keep this user manual to achieve the best results from your equipment and avoid damage through misuse.
- Page 3 1U rack space (the 4 self-adhesive feet will need to be removed to allow this) Speaker connections The A22 has 2 speaker outputs - CH1 and CH2 - on a single removable screw terminal block, which can be wired as Left and Right stereo outputs. (13, 14) Connect the negative “–”...
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Page 4: Input Connections
Bluetooth, which are all handled by the built-in media player. For good reception of FM radio stations (if needed) in the media player, the A22 has an “F” connector (12) on the rear panel which can be connected to an external FM antenna (aerial) This is recommended if the FM tuner is to be used. -
Page 5: Operation
Turn the output levels down if this happens until the distorted sound becomes cleaner and clearer. Before powering the A22 off, ensure that the volume controls are turned down to avoid loud noises or pops through the connected speakers. -
Page 6: Function Display
Media player The media player has several different audio source options, which are accessed using the “MODE” button. Five more buttons control the playback (and recording) of tracks, which is displayed in the LED display directly below the buttons. Below the LED display is a USB port for inserting a flash drive (USB pen drive) and below this is a slot for a micro SD card (or TF card) Functions of the media player are described in the table below. -
Page 7: Remote Control
Remote control The A22 is supplied with a handheld infra-red remote control, which shares many of the front panel functions along with some additional controls, as described below. Media player power on/standby button Repeat mode – select Random, One, Folder or All tracks... -
Page 8: Specifications
Specifications Power supply 230Vac, 50Hz (IEC) Output impedance 4 - 8 Ohms (each channel) Output power: 8 Ohms 2 x 25W rms / 2 x 40W max. (@ 1kHz 10% THD) Output power: 4 Ohms 2 x 35W rms / 2 x 55W max. (@ 1kHz 10% THD) Inputs: line Aux 1 (3.5mm), Aux 2 (L+R RCA), Aux 3 (L+R RCA) Input: mic...
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