The Adastra UA30 PA power amplifier combines a 100 V amplifier and built-in mixer in a half-width 1U enclosure. It features five input channels: three switchable microphone/line inputs, one RCA line input and one 3.5 mm auxiliary input. The mono output operates on a 100 V line or with an 8 Ω speaker load, while muting can be activated via 24 V fire alarm contacts.

The inputs are controlled using the front-panel volume controls and the master output control. The speaker output connects via a removable screw terminal on the rear panel, while channel CH1 provides switchable +20 V phantom power. Rack-mounting hardware is included, and can be configured to mount a single unit on a wall or under a worktop.

• Type: PA power amplifier with built-in mixer
• Input channels: 5
• RMS output power: 30 W
• Power at 8 Ω: 30 W per channel
• Power at 100 V: 30 W
• Output: Mono, 100 V or 8 Ω
• Inputs: 3 switchable mic/line, 1 RCA line and 1 auxiliary 3.5 mm
• Mic/line inputs: Combination and 2 × 6.3 mm jack sockets
• Phantom power: Switchable +20 V on CH1, via XLR or rear terminals
• Line output: 2 RCA, mono
• Speaker output: Euroblock terminals for 100 V, 8 Ω and common connection
• Muting: 24 V relay contacts for fire alarm
• Amplifier design: Class D with output transformer
• Input impedance: 1 kΩ on mic/line inputs
• Input sensitivity: -10 dB for line and -45 dB for microphone
• Signal-to-noise ratio: 80 dB for line and 75 dB for microphone
• Frequency response: 100 Hz–18 kHz
• THD: <0.4% at 1 kHz
• Cooling system: Built-in
• Power supply: 170–264 Vac, 50 Hz, IEC
• Dimensions: 249 × 210 × 44 mm
• Weight: 2.35 kg
• Package contents: Rack-mounting hardware