A2 Rackmount Stereo Amplifier with Media Player Item ref: 953.402UK User Manual Version 1.
Introduction Thank you for choosing the Adastra A2 rackmount stereo 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.
Front panel 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. Power on/off switch SD card slot Media player display 3.5mm stereo Aux input Aux input volume control Media player volume control Line 1 input volume control Line 2 input volume control Stereo input selector Bass EQ control Treble EQ control 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. Channel 1 output level control Channel 2 output level control USB port Media player control panel Mic 1 input 6.3mm jack Mic 2 input 6.
Speaker connections The A2 has 2 speaker output channels (Ch1 + Ch2) which can be used for Left and Right stereo output. For each output, connect “–” to the “–” speaker terminal(s) and “+” to the “+” speaker terminal(s) Connect speakers with a combined impedance of no lower than 4Ω to each output channel. • • • If the speakers being connected are 4Ω, then connect only 1 speaker to each channel. If the speakers are 8Ω, you can connect up to 2 speakers in parallel to each channel.
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) to the 12 o’clock position (pointing straight up) and turn the Ch1 and Ch2 rotary controls (12, 13) up part way for testing.
Media player The A2 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.
Bluetooth The Bluetooth function allows connection of a smart phone or tablet to the media player section for playback of stored files or streamed digital audio. To enable this function, it will be necessary to pair the sending device to the receiver as follows. 1. Press the media player MODE button until the display flashes “” 2. Open the Bluetooth settings menu on the smart phone or tablet (or other sending device) 3.
Specifications Power supply Power consumption max. Fuse Output power rms @ 4 Ohms Output power rms @ 8 Ohms Amplifier: construction Frequency response Microphone inputs Line inputs Input sensitivity: line Input sensitivity: aux Input impedance Audio source Input controls Line output Speaker outputs Antenna connection Output controls Dynamic range THD +N Protection Dimensions Weight 230Vac, 50Hz (IEC) 280W F5A, 250V 2 x 200W 2 x 100W Class D 20Hz - 20kHz ±0.5dB 2 x 6.3mm jack (mono) Line 1: L+R (6.
