Overview



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.




At-a-glance



  • Bluetooth receiver

  • FM radio tuner with external aerial connection

  • Independent stereo playback to 2 separate zones

  • Media player with USB/SD playback




Reasons to buy


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

Specification


Technical Description: Adastra A4 2.0 channels Black

Audio
Frequency range:The lowest and the hightest frequencies that can be inputted/produced.
20 - 20000 Hz
RMS rated power:RMS (Root mean square) is a measure of the continuous power required by a device, in particular audio amplfiers and loudspeakers.
800 W
Output impedance:
4 - 8 O
Input sensitivity:
775 mV
Total Harmonic Distortion (THD):Total harmonic distortion is a measure of non-linear harmonic\n\ndistortion and is given in %. Non-linear harmonic distortions are\n\nsignals which were not present in the original before the signal was\n\nconverted by the headphones. These unwanted signals are caused by the\n\ndiaphragm, whose movements do not precisely move in time with the\n\nelectric signals that cause it to move. Unfortunately, this is a\n\nfeature of all electroacoustic transducers. Although it cannot be\n\ncompletely eliminated, suitable steps can be taken to minimise it.\n\nHowever, the user is not interested in why this distortion takes place\n\nbut in how great the level of distortion must be for it to become\n\nperceptible. According to the findings of several research projects, a\n\ntotal harmonic distortion of 1% in the frequency range of 100 to 2000\n\nHz is imperceptible. Below 100 Hz, the perceptibility threshold lies\n\nat 10%.
0.1%
Amplifier class:An electronic amplifier, amplifier, or (informally) amp is an electronic device that increases the power of a signal. It does this by taking energy from a power supply and controlling the output to match the input signal shape but with a larger amplitude. Power amplifier circuits (output stages) are classified as A, B, A/B and C for analog designs, and class D and E for switching designs based on the proportion of each input cycle (conduction angle), during which an amplifying device is passing current.
D
Peak power per channel:The maximum power (usually measued in watts) that can be transmitted through a channel.
200 W
Audio output channels:An audio output channel is an electric circuit which acts as a path for a signal produced by a device. A device may have several audio output channels.
2.0 channels

Display
Built-in display:A display which is part of the product, so you do not need to attach another display.
Yes

Packaging content
Remote control included:
Yes

Packaging data
Package weight:Weight of the packaged product.
6.82 kg
Package height:The distance from the top to the bottom of the packaging.
140 mm
Package depth:The distance from the front to the back of the packaging.
325 mm
Package width:The distance from one side of the packaging to the other.
505 mm

Ports & interfaces
Microphone in:The socket where a microphone is connected to the device.
Yes
Headphone connectivity:How headphones connect to a device e.g. wirelessly or via a cable and connector.
3.5 mm
Headphone outputs:Number of sockets /ports where headphones are connected.
1
Audio (L/R) out:
4
Audio (L/R) in:
2
USB 2.0 ports quantity:Number of USB 2.0 ports (connecting interfaces) in the device. USB 2.0 was released in April 2000 (now called "Hi-Speed"), adding higher maximum signaling rate of 480 Mbit/s (effective throughput up to 35 MB/s or 280 Mbit/s), USB 2.0 ports are usually black.
1
Speakers connectivity type:The type of connection used for the speakers e.g. RCA connector.
Binding post

Power
Power protection features:Features that protect the device against power problems e.g. overload.
Over current, Over voltage, Overheating, Short circuit
AC input frequency:
50 Hz
AC input voltage:The voltage of the AC electricity that is inpitted into the product.
230 V

Technical details
Channels quantity:The number of channels the device has. There can be an individual input or output for each channel.
4 channels
Equalizer:Device that attempts to reverse the distortion incurred by a signal transmitted through a channel.
Yes
On/off switch:The button which is pressed to switch the device on or off.
Yes
Rack capacity:The spase that device fill in rack.
2U
Treble adjustment:
Yes
Bass adjustment:
Yes
Gain adjustment:
Rotary
Volume control:
Rotary
Multi-Zone capability:
Yes
Product colour:
Black
Connectivity technology:
Wired & Wireless

Weight & dimensions
Weight:Weight of the product without packaging (net weight). If possible, the net weight is given including standard accessories and supplies. Please note that sometimes the manufacturer leaves out the weight of accessories and/or supplies.
5.98 kg
Height:The measurement of the product from head to foot or from base to top.
88 mm
Depth:The distance from the front to the back of something.
240 mm
Width:The measurement or extent of something from side to side.
482 mm


Product details


953.404UK Adastra 5015972203132

Adastra A4 2.0 channels Black

£215.99 and In stock

SKU953.404UK

Adastra A4 2.0 channels Black

Quick Code: Q39172 MPN: 953.404UK
£215.99

In Stock

Key Features

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