The Adastra A22 stereo PA amplifier combines Class-D amplification with built-in media playback. It delivers up to 2 x 55 W at 4 Ω and up to 2 x 40 W at 8 Ω, while the microphone input with separate volume control is ideal for announcements and alerts.

Playback supports MP3 files from USB or microSD, FM radio and Bluetooth. Functions can be controlled from the front panel or with the included infrared remote control. Four rotating mounting brackets allow installation under a counter or on a wall, while two units can be mounted side by side in 1U of rack space.

• Type: Integrated stereo PA amplifier
• Amplification technology: Class-D
• Channels: 2
• Output power at 8 Ω: 2 x 25 W RMS, 2 x 40 W maximum
• Output power at 4 Ω: 2 x 35 W RMS, 2 x 55 W maximum
• Output impedance: 4–8 Ω per channel
• Line inputs: 1 x 3.5 mm and 2 x stereo RCA
• Microphone input: 6.3 mm
• Audio sources: USB, microSD, FM and Bluetooth
• Sound adjustment: Microphone and music volume, treble and bass
• FM antenna: F-type connection
• Remote control: Infrared, included
• Mounting brackets: 4 rotating brackets, included
• Power supply: 230 V AC, 50 Hz
• Dimensions: 215 x 180 x 43 mm
• Weight: 820 g