Allen & Heath PA20CP Powered Console

ALLEN PA20CP Details ^top

PA20-CP 20 input 1kW powered console

PA series mixers are designed to provide all the tools you need to run a regular stereo PA system in a straightforward ‘walk up and go' format. You'll quickly feel at home with these desks, but you'll also find that we've included a number of those innovative touches that you only get from designers who have many years of ‘real world' experience. If you care about quality you'll also appreciate the build standards that the PA series conforms to, including the same individual vertical circuit boards, nutted pots and solid copper buss interconnection as our acclaimed ML series consoles. As for audio performance, PA series mixers have the wonderfully full, open, natural quality that you'd expect from a professional ALLEN&HEATH desk.

Mono Inputs
16 mono channels with Mic [XLR] & Line [TRS] inputs. Line input overrides the XLR input. Individual +48V phantom power switches are provided. New padless two-stage preamp with smooth gain law. Line input goes to second stage for better matching and performance. Switched 100Hz high pass filter. Insert point. 4 band EQ. 4 aux mixes. Mute with LED. PFL button with LED [functions as peak indicator]. 100mm fader.

Dual Stereo Channels
Two stereo channels with two unbalanced stereo inputs on each. One is RCA one is TRS jack. Independent gain controls provide source mixing in the channel strip. The top inputs [RCA] can be switched direct to L&R instead of the channel strip providing extra returns. Two band shelving EQ. 4 aux mixes. Stereo balance, mute with LED, PFL with LED, and 100mm fader as mono channels.

4 Auxiliary Sends
From all channels: 2 pre-fade for foldback mixes - these have 100mm fader masters, mute switch with LED, AFL with LED, and TRS outputs [can be routed internally to output section]. 1 post-fade aux mix for FX - this feeds the internal FX and has a TRS jack output for external FX. 1 post-fade aux mix to TRS jack output is provided for external FX or special feeds.

Mix Outputs
Main stereo mix output has 100mm fader control & mute with LED. TRS jack outputs. Mono sum output with level control with switch for subwoofer mode to TRS jack. Record output [RCA] analogue + SPDIF switchable pre/post fader. Twin 12 segment LED bar meter shows program [or PFL /AFL]. Insert points on TRS jack for external processing. Output EQ and routing to internal amplifiers / external systems is provided.

Output EQ
4 band semi-parametric EQ is provided in the output section, this affects the TRS slave outputs, and the internal constant power amplifiers. This offers more control than graphic equalisers for precise management of speakers, especially foldback / monitors. Source selector allows output EQ section to be used on Left / right, L&R sum / foldback1, or foldback1 / foldback2.

Constant Power Amplifiers
1kW i.e. 2 x 500W RMS peak power professional class AB power amplifiers built in. Unique ALLEN&HEATH design gives full output into 4 OR 8 ohms [rear switch selector]. Output is to locking Speakon™ connectors. Thermal management twin fan system. Full protection - input limiter to prevent clipping, short circuit protection, current limit and DC fault sensing. LED indication of: signal presence, peak warning, speaker protect and temperature. AB amp input TRS break-jacks [normalised to output section / slave out jacks] allow independent use of the power amplifiers if desired. Standby mode switch puts amplifier into protect with speakers isolated.

Digital FX
16 program digital FX processor provides reverbs, delays, chorus and others, inc combined. This FX module takes its feed from the post-fade FX aux on the mono & stereo channels. The output of the FX module is controlled by a 100mm fader with mute & PFL and is routed to the stereo mix and FB1&2 with post fade level controls. At this point, 2 TRS inputs with level control provide a way of combining external FX with the internal unit. Internal FX unit can be switched off to use external only if preferred. A footswitch TRS jack is provided to mute the FX channel. Editing of FX can be done via MIDI using ALLEN&HEATH software editor available free from resource CD or Click here

Master Section
Background music BGM mode - plays 2 track input into the main mix post fader, allows user to pull down fader (whilst patching, taking a break, or during walk-in) and leave music playing through the amplifiers / speakers. 2 track input [RCA] with level control to L&R - feeds headphone monitor selector [checking recording]. Twin, 3 colour 12 segment LED meter displays active monitor source. Large LED indicates PFL / AFL active - signal overrides L&R / 2TRK monitor source selection. Standby switch uses relays to disconnect the speakers. 2 track output [RCA] analogue + SPDIF allows direct to digital recording. Switchable pre / post master L&R fader. Mono sum out with level [TRS] - mode switch to provide sub feed with 100Hz low pass filter. Phones out [TRS] with level.

PSU
Solid & reliable internal PSU. 1600W design.

Lamp
4-pin XLR socket

Mechanical specs
Width Height Depth Weight
PA20-CP 733 mm (28.9”) 178 mm (7.0”) 539 mm (21.2”) 24 kg (53 lbs)

ALLEN PA20CP Specs ^top

Technical Specs
0dBu = 0.775 Volts rms 0dBV = 1 Volt rms

Maximum outputlevel
TRS +21dBu into 2k ohm load

Nominal outputlevel
L-R +0dBu into 600ohm max load
Other o/p's +0dBu into 2k ohmmax load

Internal headroom
Mix to o/p +21dB
Channels+21dB

Peak LEDs
5dB before clipping

Noise -measured rms 22Hz to 22kHz
Mic EIN ref 150 ohm source -128dB
L-Rresidual <-89dBu (nothing routed)
L-R mix <-85dBu (channels routed)

Frequency response
20Hz to 30kHz +/- 0.5dB

THD +10dbu, 1kHz
Channel to mix o/p <0.006%

Crosstalk - 1kHz
Ch to ch <-90dB
Chl mute shutoff<-95dB
Ch fader shutoff <-95dB

Power Amp
Outputpower Constant Power switchable
= 2 x 500w RMS into 4 ohm
= 2 x 500wRMS into 8 ohm
Frequency response THD+N <0.02%@1kHz

MainsPower - Internal unit, linear regulated Internally wired to requiredcountry voltage
AC mains input 100V to 240V AC@50/60Hz
Powerconsumption 1600W max

Mains fuse rating
100-120V AC use T10A 20mm
220-240V AC use T8A 20mm

ALLEN PA20CP Documentation ^top

PA12-CP: Associated Downloads:

Brochure ...120KB.pdf
Includes details of features plus technical specs, dimensions and connections info for both PA12-CP and PA20-CP

User Guide ...3.3MB.pdf
Comprehensive 36 page guide to PA12-CP and PA20-CP, with practical advice on getting the best from these consoles.

Block diagram ...114KB.pdf
System block diagram for PA12-CP and PA20-CP

Cue sheet ...453KB.pdf
For recording PA12-CP and PA20-CP console settings

PA FX Editor ...909kb.zip
The PA FX Editor is a 32 bit PC application for editing the built-in effects on the Allen & Heath PA Series mixing consoles.

PA EQ Visualiser ...1.3mb.exe
4 Band semi-parametric equaliser as found on the output of the PA series mixers.