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TECHNOLOGY SHOWCASE: POWERED MIXERS
Sep 2, 2009 12:00 PM, By Bennett Liles
Flexible all-in-one mixers are ready to tour.
While the concept of mixers with built-in power amps is certainly not new, there have been some amazing strides made in this line of products because of the advances in power amp design and electronics integration. The models we will explore here are designed for live sound and primarily for mobile applications rather than for permanent installation, such as in paging systems. In venues with space restrictions, though, the solutions represented here can certainly be used in a permanent setup. Most of these units can be connected directly to loudspeaker systems or connected using only the mixer section with line-level outputs run to external power amplifiers. Their primary advantage is in taking live sound on the road with the mixer and power amps contained in one compact enclosure. The PA20-CP is a powered version of the Allen & Heath PA Series mixer using the company's Constant Power system to deliver 500W RMS power on each stereo side into either a 4- or 8-load. The output signal is selectable to carry left and right stereo, left plus right mono, foldback 1, or foldback Allen & Heath PA20-CP 2. Maximum flexibility is provided through inclusion of master trim control, level meters, slave outputs, 4-band semiparametric equalizers, and patch points for connection of external processing gear, if needed. The features of the PA20-CP allow the board to be used as a standalone sound system connected directly to main house loudspeakers or to be used in conjunction with an existing sound system where the mixer's power outputs can be used for equalized stage monitoring or powered feeds to other locations. The meters provide a peak threshold indication 5dB before clipping, and there is a 4-pin lamp connector on the rear of the console. With 16 microphone input channels and two line-level stereo inputs, the APM200 from Alto incorporates a 24-bit digital effects section with 16 factory presets and 16 variations for every preset for a total of 256 custom digital effects. Each mic input channel has 3-band EQ controls, and the stereo input channels with balanced TRS input jacks feature 4-band EQ. The mixer also features a 9-band graphic EQ, a peak LED indicator on each input channel, and a continuously variable input pad knob along with a 12-segment bar graph meter on the main outputs. The mic channels also have a 75Hz, 18dB-per-octave low-cut control. To provide maximum space for operator controls, the input connectors are located on the back of the console, where each channel includes a 1/4in. line input jack, an XLR mic input connector, and a TRS insert patch point. Slide switches control phantom power to the mic inputs in groups of four.

Alto APM200

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ALLEN&HEATH PA series
ALLEN&HEATH PA Series
Welcome to the PA Series, a new range of mixers designed to bring ALLEN&HEATHs legendary innovative design and excellent sound quality to entry-level mixing in any number of applications, for club performers and schools systems, conference rooms and travelling musicians. The CP models are equipped with the unique ALLEN&HEATH 1000W Constant Power amplifiers, delivering 500W per side into 4 OR 8 ohm speakers.

UNPOWERED

PA Series

Connections

Inputs Mono IN Stereo A1 Stereo B2 2-track return Inserts Channel Inserts LR insert Outputs LR, Mono, AB 2 Track out Headphones SPDIF out TRS jack RCA phono TRS jack RCA phono ground compensated, tip+ ground compensated, tip+ unbalanced Tip L, Ring R Transformer isolated digital >30 ohm 0dBu 0dBu TRS jack TRS jack tip send, ring return tip send, ring return 0dBu 0dBu XLR TRS Jack RCA phono TRS Jack RCA phono Balanced Balanced, tip+ Unbalanced Unbalanced Unbalanced >10k ohm 2k ohm >30k ohm -62 to +5dBu -26 to +10dBu -10dBu to off -10dBu to off 0dBu, +20dBu max
The range is designed to provide all the tools you need to run a regular stereo PA system in a straightforward walk up and go format. Youll quickly feel at home with these desks but youll also find that weve included a number of those innovative touches that you only get from designers who have many years of real world experience. This is the first time that such outstanding sound quality has been incorporated into an entry level desk so much so, that we think it sounds as good as HiFi. If you care about quality youll also appreciate the build standards that the PA Series conforms to, including the same type of individual vertical circuit boards, nutted pots and solid copper buss interconnection that we use in our acclaimed ML Series live consoles.
Aux, FX, FB1, FB2 TRS jack
PA Series Common Features
Mono channels with line and XLR inputs with new padless preamp Individual 48V phantom power 100Hz high pass filter Insert points and mutes throughout 4 band EQ shelving LF and HF, fixed LM at 250Hz and swept HM. Two dual stereo channels each with RCA and TRS inputs, 2 band shelving EQ 100mm faders on mono and stereo channels 4 auxiliary sends 2 prefade for foldback mixes, 1 postfade feeding internal FX and 1 postfade for external FX or special feeds Mix outputs: Main stereo mix with 100mm fader and mute, TRS jack outputs. Mono sum output to TRS jack + mode switch for subwoofer mode Record RCA output and SPDIF. 4 band semi parametric EQ on outputs for precise speaker management source selector allows use on Left/right, L&R sum + foldback1 or foldback1/2 Digital FX provides 16 editable FX including reverb, chorus, delays, etc. with 100mm fader control. Can be switched off if external FX used, or can be combined. Footswitch TRS jack provided for muting the FX channel. FX can be edited via MIDI using software available from allen-heath.com. Background music mode plays 2 track input into main mix post fader leaving music playing through speaker during breaks. 2 track RCA input feeds headphone monitor to check recording Monitoring main LR on 12 bar LED, Large LED indicates PFL/AFL active Solid and reliable internal 1600W PSU Strong steel chassis, practical trims and armrest/carry handle 4-pin XLR lamp socket

PA12-CP PA12-CP Rear connections on above PA systems
Mechanical Specifications

Dimensions

Width Height Depth
PA12-CP Desk mounted Rack mounted PA20-CP Desk mounted PA20 Desk mounted 732(28.8) 958(37.7) 145(5.7) 145(5.7) 538(21) 538(21) PA28 Desk mounted Wieght

Unpacked Packed

525(20.6) 483 (19) 732(28.8)

177(7) 444(17.5) 177(7)

538(21) 135(5.3) 538(21)
(inc side trims) (NB requires 11U rackspace)

POWERED

PA12-CP PA20-CP PA20 PA28
21kg (46lbs) 24kg (53lbs) 17kg (37lbs) 19kg (42lbs)
22kg (48lbs) 25kg (55lbs) 18kg (40lbs) 20kg (44lbs)

Power Specifications

Mains Power - Internal unit, linear regulated Internally wired to required country voltage PA20 + PA28 AC mains input Power consumption Mains fuse rating PA12-CP + PA20-CP AC mains input Power consumption Mains fuse rating 100V to 240V AC@50/60Hz 1600W max 100-120V AC use T10A 20mm 220-240V AC use T8A 20mm Power Amp - (PA12-CP + PA20-CP only) Output power Constant Power switchable = 2 x 500w RMS into 4 ohm = 2 x 500w RMS into 8 ohm Distortion THD+N <0.02%@1kHz 100V to 240V AC@50/60Hz 75W max 100-120V AC use T1A 20mm
PA Constant Power PA12-CP and PA20-CP
2 x 500W RMS peak power professional AB amplifiers. Unique design allows Constant Power output 500W - into 4 or 8 ohm speakers, switchable. Output via Speakon connectors Thermal management system with twin fan system. LED activity indicators. TRS break-jack allow independent use of amps if desired. Standby switch protects amp with speakers isolated PA12-CP can be rack mounted in either of 2 positions, with side trims and carry handle removed
Rear connections on above PA-CP systems

QX PA Poster Leaf

Allen & Heath reserve the right to improve or otherwise alter any information supplied in this document or any other documentation supplied thereafter.

ALLEN&HEATH

24/2/03
Allen & Heath Limited Kernick Industrial Estate Penryn Cornwall TR10 9LU UK T: +44 (0)F: +44 (0)W: www.allen-heath.com

1:19 pm

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Digital live mixers with onboard DSP

I-con series

DSP audio system for installed sound

iDR series

Professional DJ mixers

Xone series

Live sound consoles

GL series

Multipurpose rack mount consoles

MixWizard series

Live sound VCA consoles

ML series