
AMX-20-DSP4-ACD
The preamp mixer AMX-20-DSP4-ACD is a modern automatic digital mixer with signal processor DSP with highest sound quality.
The digital automatic preamplifier is equipped with 20 inputs and 4 outputs, phantom power, 10 input and 5 output PEQ, HPF filter (100Hz), MIC./LINE, digital automatic system DIGITAL SIGNAL DELAY FIELD with BARRIER -GATE, GATE-OPEN & GAIN-CONTROL, de-esser, MP3 player with BT receiver, audio matrix and more.
With compressor expander limiter function.
The AMX-20-DSP-4ACD preamplifier is specially designed for professional sound reinforcement applications in acoustically difficult buildings (building acoustics).
This professional pre amp is equipped with most modern technologies and is used where most other devices do not produce positive results or an entire rack of system components would have to be built to provide a reasonable acoustical result.
The 16 universal inputs can be switched by DIP switches between MIC and LINE sensitivity. Each of the 16 universal inputs has switchable phantom power and a HPF filter (100 Hz).
The universal inputs are equipped with a switchable automatic microphone system, DIGITAL SIGNAL DELAY FIELD system (DSDF). The activation only of the microphones being addressed is automatic and is controlled and monitored by the processor system (DSDF). Unnecessary open microphone channels are closed.
The input matrix (DIP switches) can be used to assign the input channels 1-16 to the outputs MAINSUM-2 and / or the output MAINSUM-3.
The built-in MP3 player module with BT receiver (including IR remote control) has inputs for USB sticks and a SD memory card and will optimally accompany you during the operation. The integrated BT receiver supports all popular Bluetooth-enabled devices and allows you to wirelessly transfer music or pre-made texts from your mobile phone, PC or MP3 player to the amplifier and play it.

Specials
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MP3 player with USB port, SD card reader and BT receiver
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16 inputs on XLR (MIC.-LINE), 4 LINE inputs (LINE 17-18) on RCA (LINE 19-20) on XLR
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16 x inputs with automatic microphone system DIGITAL SIGNAL DELAY FIELD system (DSDF)
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1 x de-esser with FULL/SPLIT and AIR function (master)
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Compressor expander limiter
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10 input parametric EQ
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4 x 5 output parametric EQ, 4 delays, 4 volume controls & automatic feedback limiter
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4 DSP MASTER outputs 1 to 4; configuration of output no. 4 as x-over SUB output possible
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2 presets
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Digital input NOISE-GATE & signal limiter (software)
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Two input groups IN-1 (inputs 1-20 with ROUTING to outputs 1-3) and IN-2 (inputs 17-20 with ROUTING on output 4, (SWITCHING MATRIX)
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Freely programmable calendar function
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INFO-OUT (PRESETS-2) potential-free relay. It may e.g. additional speaker lines can be connected to presets 2
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PRE-MASTER & EQ output (signal output before MASTER and audio DSP)
Product safety information
Manufacturer information:
PHOENIX Professional Audio GmbH
Hermann-Oberth-Str. 12
Bayern
Bruckmühl, Deutschland, 83052
info@phoenix-pa.com
https://www.phoenix-pa.com

Technical Details
10-point parametric EQ at DSP input |
± 12 dB, 0.05 3oct; 20Hz 21.2kHz |
5-point parametric EQ on 4 outputs |
± 12 dB, 0.05 3oct; 20Hz 21.2kHz |
Attachment |
19" mounting angles |
Audio input |
16 x MIC.-LINE + 2 x RCA + 2 x XLR |
Audio output |
6 x process audio out |
Automatic mixer |
DIGITAL SIGNAL DELAY FIELD |
Automatic MODES |
yes, automatic activation preset-2, day / week / month / year programs |
Automatic NOISE GATE |
Yes |
Colour |
graphite |
Compressor / limiter |
optional |
Conference configuration / priority |
Yes |
Control LEDs |
Yes |
DeEsser |
800Hz - 8kHz; 0dB - -20dB |
Delay on 4 outputs |
0 - 85 m |
Dimensions B / H / D [mm] |
483 x 270 x 340 |
Display |
Yes |
Display LEDs |
Yes |
EQ |
Yes |
Equalization Parametric EQ |
Yes |
Expander Compressor Limiter |
Yes |
Feedback limiter |
Adaptive or phase shift |
Frequency response |
40 Hz to 22,000 Hz @ -3dB |
Gain (entrance) |
Yes |
Gain (system) |
Yes |
Gain / filter |
Yes |
Gain control |
For all MIC.-LINE inputs, analogue on the back of the device, digital in the device configurator |
Gate Attack |
Yes |
Gate level |
Yes |
Gate release |
Yes |
Line inputs |
Yes |
Line outputs |
Yes |
Weight |
12.5 kg |
Mic. inputs |
Yes |
MP3 player |
with USB/SD-Ports + BT receiver, with remote control |
Output PRO-OUT |
Yes |
PEQ (system) |
Yes |
Phantom power |
switchable 24VDC (DIP-switch) |
Power supply |
230 VAC - 50/60 Hz |
Presets |
Preset-1, Preset-2 with plain text |
Priority input (LINE) |
yes (conference configuration) |
Programmed balanced microphone / line inputs |
Input XLR: 1-16 |
- Switch MIC / LINE |
Yes |
- Sensitivity MIC |
-40dB -15dB |
- Sensitivity LINE |
-15dB + 5dB |
- Impedance |
1.6 kΩ |
- phantom power |
48V DC |
- HPF filter |
100 Hz, 6dB / oct. |
- Regulation: bass, soprano |
± 12dB, 100 Hz, 10 kHz, shelving filter |
- Signaling LED |
green LED channel active, red LED overload |
Protection circuits |
Limiter, short circuit, overheating, overload, softstart, subsonic |
REC OUT |
Yes |
Signal to Noise Ratio |
Can be set in the device configurator @ NOISE GATE / ON |
Subwoofer output |
Assigned channel 16 as well as universal inputs 17-20 |
System software |
Yes |
THD |
<0.08%> |
Universal input (mono) |
Input RCA: 17 u. 18; XLR: 19,20 |
- input sensitivity |
-10dB + 12dB |
- Impedance |
10 kΩ |
- Regulation: bass, soprano |
± 12dB, 100 Hz, 10 kHz, shelving filter |
Working temperature |
from -5° C to + 40° C |
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