# Adastra A4 4 x 200W Stereo Amplifier with FM Radio/Bluetooth & Media Player

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.

**FEATURES**

-   Independent stereo playback to 2 separate zones
-   Media player with USB/SD playback
-   FM radio tuner with external aerial connection
-   Bluetooth receiver

###### What You Get

-   A4 dual stereo amplifier
-   IEC power lead

###### Specifications

-   **Power supply:** 230Vac, 50Hz (IEC)
-   **Fuse:** F5A, 250V
-   **Output power:** rms @ 4 Ohms4 x 200W
-   **Output power:** rms @ 8 Ohms4 x 100W
-   **Amplifier:** construction Class D
-   **Frequency response:** 20Hz - 20kHz ±0.5dB
-   **Microphone inputs:** 2 x 6.3mm jack (mono)
-   **Line inputsLine 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:** aux0.480Vrms
-   **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, Media, Line1, Line2, Mic1, Mic2, Talkover
-   **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, Ch1, Ch2, Ch3, Ch4
-   **Dynamic range:** 92dB
-   **THD+N:** <0.1%
-   **Protection:** Thermal, over-current, over-voltage, short-circuit
-   **Dimensions:** 482 x 240 x 88mm
-   **Weight:** 5.98kg
-   **Warranty:** 1 Year

## Details

- **Price:** 249.99 GBP
- **Vendor:** Adastra
- **Type:** Amplifiers
- **Tags:** BLACK5

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 249.99 GBP | In stock |

## Images

- Adastra A4 4 x 200W Stereo Amplifier with FM Radio/Bluetooth & Media Player - K&B Audio
- Adastra A4 4 x 200W Stereo Amplifier with FM Radio/Bluetooth & Media Player - K&B Audio
- Adastra A4 4 x 200W Stereo Amplifier with FM Radio/Bluetooth & Media Player - K&B Audio
- Adastra A4 4 x 200W Stereo Amplifier with FM Radio/Bluetooth & Media Player - K&B Audio
- Adastra A4 4 x 200W Stereo Amplifier with FM Radio/Bluetooth & Media Player - K&B Audio
- Adastra A4 4 x 200W Stereo Amplifier with FM Radio/Bluetooth & Media Player - K&B Audio
- Adastra A4 4 x 200W Stereo Amplifier with FM Radio/Bluetooth & Media Player - K&B Audio
- Adastra A4 4 x 200W Stereo Amplifier with FM Radio/Bluetooth & Media Player - K&B Audio

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> Source: [K&B Audio](https://www.kbaudio.co.uk/products/adastra-a4-dual-zone-200w-stereo-amplifier-with-fm-radio-bluetooth-media-player)
> Updated: 2026-06-11