The PA12-CP has 8 mono and 2 dual stereo channels. The PA20-CP has 16 mono and 2 dual stereo channels. Both are portable and include protective side trims and front carry handles. The PA12-CP can be mounted in a standard 19” rack or plinth by removing its trims and fitting optional rack ears provided.

The two amplifiers can be configured in several different ways according to your PA requirements. For example, you may run a stereo house system without monitors, or a mono system with additional musicians monitor speaker, or you may connect to externally powered house speakers and use the internal amplifiers for two independent monitor speakers. The additional mono line output can be used, for example, to feed a sub bass amplifier/speaker system or another listening zone.

The power amplifier is without doubt the most critical device in the audio signal path. It converts a reservoir of power derived from the mains supply into amplified sound. The PA-CP amplifier is a third generation design that has been rigorously field tested both for absolute reliability and sound quality. It uses a solid, no-nonsense 1.6kW linear power supply and bi-polar assisted MOSFET Class AB amplifier design. The unique Allen & Heath constant power system ensures that all the available power is converted into useable speaker power so achieving the full 500W per side into 4 ohms or 8 ohms. Full protection is provided including isolating relays, short circuit and over current protection, output sensing clip limiter, and twin fan thermal management.

We recognise the importance of accurate equalisation both for creative sound processing and for dealing with problems such as feedback and room resonance. The channel strip features a powerful 4 band EQ with two mids, one with swept frequency. We have chosen to include 4 band semiparametric rather than traditional graphic EQ on the amplifier channels.