The Adastra A2 stereo amplifier combines a Class D power amplifier with a mixer section for two microphones and stereo audio sources. The built-in player supports MP3 files from USB or an SD card, and it also features an FM tuner and a Bluetooth receiver. The source is selected using a rotary switch.

The rear inputs include two stereo line inputs, while a front 3.5 mm auxiliary input is also provided. The speaker outputs are on the rear panel and use 4 mm binding posts. The amplifier is designed for use in PA installations and music playback.

• Type: PA power amplifier
• Channels: 2
• Amplifier technology: Class D
• Output power at 4 Ω: 2 x 200 W RMS
• Output power at 8 Ω: 2 x 100 W RMS
• Frequency response: 20 Hz–20 kHz ±0.5 dB
• Microphone inputs: 2 x 6.3 mm mono jacks
• Line inputs: Line 1 L + R via 6.3 mm jacks or RCA, Line 2 L + R via RCA
• Auxiliary input: 3.5 mm stereo jack
• Line input sensitivity: 0.775 Vrms
• Auxiliary input sensitivity: 0.480 Vrms
• Input impedance: 20 kΩ balanced, 10 kΩ unbalanced
• Audio sources: MP3 playback from USB or SD, FM tuner and Bluetooth receiver
• Bluetooth version: 2.3
• Input controls: Aux, Media, Line1, Line2, Mic1, Mic2, Talkover
• Line output: 2 x RCA
• Speaker outputs: 2 channels via 4 mm binding posts
• Antenna connection: F-type for the FM tuner
• Output controls: Source selection, bass, treble, Ch1, Ch2
• Dynamic range: 92 dB
• Power supply: 230 Vac, 50 Hz via IEC
• Fuse: F5A, 250 V
• Width: 482 mm
• Height: 88 mm
• Depth: 240 mm
• Weight: 5.21 kg