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Summary of Contents for Adastra A4
- Page 1 Rackmount Quad Amplifier with Media Player Item ref: 953.404UK User Manual 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 Adastra A4 rackmount quad amplifier to power your public address system. This amplifier is designed to offer high quality, dependable service for mobile and installed systems. Please read this manual fully and follow the instructions to achieve the best results with your new purchase and to avoid damage through misuse.
- Page 3 Front panel Power on/off switch Output Signal & Clip indicators SD card slot USB port Media player display Media player control panel 3.5mm stereo Aux input Mic 1 input 6.3mm jack Aux input volume control Mic 2 input 6.3mm jack Media player volume control Mic 1 volume control Line 1 input volume control...
- Page 4 The mix of mic/line inputs to Ch3+Ch4 can be fed onto further equipment via the RCA line output (30) For good reception of FM radio stations (if needed) in the media player, the A4 has an “F” connector on the rear panel (28) which can be connected to an external FM antenna (aerial) Connect the IEC power inlet (38) to the 230Vac mains supply, using the IEC lead provided.
- Page 5 Operation When all connections to the amplifier are made, turn all rotary controls down and switch on the power (1) and the media player display will illuminate. Turn Bass and Treble controls (10, 11, 23, 24) to the 12 o’clock position (pointing straight up) and turn the Ch1, Ch2, Ch3 and Ch4 rotary controls (12, 13, 25, 26) up part way for testing.
- Page 6 Media player The A4 amplifier is equipped with a multi-functional media player for playback of audio files from USB or SD media, FM radio stations or Bluetooth connection. Front panel controls are as described below. MODE Select between USB, SD, FM tuner & Bluetooth Repeat mode –...
- Page 7 If Bluetooth is disabled on the sending device or paired to a different receiver, it will be necessary to re- connect the sending device to the A4 from step 2 above to re-establish a Bluetooth link. Media player remote control In addition to front panel controls, the media player can be operated via the supplied I.R.
- Page 8 Specifications Power supply 230Vac, 50Hz (IEC) Power consumption max. 360W Fuse F5A, 250V Output power rms @ 4 Ohms 4 x 200W Output power rms @ 8 Ohms 4 x 100W Amplifier: construction Class D Frequency response 20Hz - 20kHz ±0.5dB Microphone inputs 2 x 6.3mm jack (mono) Line inputs...
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