MPA82000 Power Amplifier
Cables and Connections
The MTI MPA82000 uses industry standard 3-pole XLR sockets for the signal inputs and 4-pole
Neutrik Speakon™ Connectors for the speaker outputs.
There are many manufacturers of XLR connectors in the world and whilst they will generally work with
each other the reliability of cheaper connectors from less well-known manufacturers is questionable.
Therefore MTI recommends that good quality XLR connectors should be used with this product. There
are some connectors that may mate with the Speakon™ sockets but MTI recommends the use of
genuine Neutrik Speakon™ connectors with this product.
When choosing signal cables and speaker cables for your system always select a professional grade
of cable with an overall round sheath that will be hardwearing and easy to handle. Cables should
always be coiled freely and not coiled over the hand and elbow which forces the conductors to twist
within the outer sheath making the cable difficult to handle.
Signal cables should consist of two inner conductors with a single overall shield. The use of balanced
signal wiring is recommended whenever possible for maximum noise immunity.
Speaker cables should be made with a minimum of 2.5mm² csa (12 gauge) cable. However for cable
runs over 50m a minimum of 4mm² (10 gauge) cable should used.
XLR-3 Pin Assignment (Inputs)
Pin 1
Signal ground (shield)
Pin 2
(hot)
Pin 3
Signal – (cold)
Speakon Pin Assignment (Speaker Outputs)
Speakon
1A 1B 2A 2B 3A 3B 4A 4B
1+
Ch 1+ Ch 2+ Ch 3+ Ch 4+ Ch 5+ Ch 6+ Ch 7+ Ch 8+
1-
Ch 1- Ch 2- Ch 3- Ch 4- Ch 5- Ch 6- Ch 7- Ch 8-
2+ Ch
2+ nc Ch
4+ nc Ch
6+ nc Ch
8+
nc
2- Ch
2- nc Ch
4- nc Ch
6- nc Ch
8-
nc
Standard configuration of MPA82000 is four 2-way active outputs. Modules 1,3, 5 and 7 are all low
frequency modules, 1000W/4Ohm bandwidth limited to 3kHz (-3dB). Channels 2,4,6 and 8 are full
range modules, 500W/4Ohm. Output Speakons are configured so that pins 1+ and 1- are connected
to the amplifier module for that channel and pins 2+ and 2- are connected to the amplifier module to
the next channel on the right. This allows quick and simple wiring to two-way speaker cabinets using
4-core Speakon cables.
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