Amplifier Classes
There have been many developments in audio electronics, resulting in different amplifier circuit designs. Such designs can be divided into classes, of which 4 main types are relevant to audio – A, AB, H and D.
A4 Dual Stereo PA Amplifier
953.404UK
A4
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...
- Independent stereo playback to 2 separate zones
- Media player with USB/SD playback
- FM radio tuner with external aerial connection
| Description | |
|---|---|
|
953.404UK
A4 Dual Stereo Amplifier 4 x 200W |
A4 Dual Stereo PA Amplifier
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. Designed to offer installers a comprehensive dual zone PA for bars, restaurants and function rooms.
- Independent stereo playback to 2 separate zones
- Media player with USB/SD playback
- FM radio tuner with external aerial connection
- Bluetooth receiver
- Power supply 230Vac, 50Hz (IEC)
- Amplifier : construction 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, 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 260 x 88mm
Versions
| 953.404UK | |
|---|---|
| Fuse | T5A, 250V |
| Output power @ 4 Ohms | 4 x 200W |
| Output power @ 8 Ohms | 4 x 100W |
| Weight | 5.98kg |
Support : articles
Power Ratings: RMS vs Max vs Peak
A summary explaining the key differences between RMS, Max and Peak power ratings.
In the box
The box for this item contains :
- A4 dual stereo amplifier
- IEC power lead
Videos
A4 Dual Stereo PA Amplifier 4 x 200W - 953.404UK
Downloads
Instruction manual
For 953.404UK (531KB)
For 953.404UK (531KB)
UK Declaration of conformity
For 953.404UK (252KB)
For 953.404UK (252KB)
EU Declaration of conformity
For 953.404UK (239KB)
For 953.404UK (239KB)
