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2U 200 Watt Stereo, 2 Zone, Mixer-Amp with USB-FM-Blue Tooth : adastra A4

Item Code : A4

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Product Details

adastra™   Zoned Mixer Amplifier

adastra - 2U 200 Watt Stereo, 2 Zone, Mixer-Amp with USB-FM-Blue Tooth : adastra A4

Item Code: A4

Brand: adastra

Manufacturer: adastra


A4 Dual Stereo PA Amplifier 4 x 200W

Fully featured PA amplifier with 2 independent stereo zone outputs and mixer section for 2 microphones and a stereo audio source.

An inbuilt media player section offers playback of mp3 audio tracks from USB drive or SD card and also has a Bluetooth receiver and FM radio tuner.

A rotary switch for each output zone selects the stereo playback audio from a choice of 2 rear stereo inputs, a front 3.5mm stereo input or the built-in media player.

Mic inputs 1 and 2 are live to both output zones at all times.

2 pairs of speaker connections on the rear panel are via 4mm binding posts, which can drive up to 2 x 8 Ohm speakers on each of the 4 channels to deliver up to 4 x 200W. Designed to offer installers a comprehensive dual zone PA for bars, restaurants and function rooms.

Rack-mountable 2U mixer-amp with built-in media player and Bluetooth receiver.


  • 4 x 200Wrms into 4 Ohms
  • Built-in Bluetooth receiver
  • Switchable +20V phantom power
  • Independent stereo playback to 2 separate zones
  • Media player with USB/SD playback
  • FM radio tuner with external aerial connection
  • Bluetooth receiver

Images of A4

Front of A4
Rear Panel of A4


Power supply 230Vac,
50Hz (IEC)
Fuse F5A,
Output power 4 x 200 Watts at 4 Ohms
4 x 100 Watts at 8 Ohms
Power Amplifiers Class D
Frequency response 20Hz - 20kHz ±0.5dB
Microphone inputs 2 x 6.3mm jack (mono)
Line inputs Line 1: L+R (6.3mm jack/RCA),
Line 2: L+R (RCA)
Input sensitivity line 0.775Vrms
Auxiliary input 3.5mm stereo jack
Input sensitivity aux 0.480Vrms
Input impedance 20k Ohms (balanced),
10k Ohms (unbalanced)
Audio source USB/SD mp3 playback,
FM tuner,
BT receiver
Bluetooth version 2.3
Input controls Aux,
Line output 4 x RCA
Speaker outputs 4mm binding posts (4 channels)
Antenna connection F type (FM tuner)
Output controls 2 x source select,
2 xBass,
2 xTreble,
Dynamic range 92dB
THD +N <0.1%
Protection Thermal,
Dimensions 482 x 240 x 88mm
Weight 5.98kg
Server 2023 S2s