TOA M-9000M2 CU is a modular pre-amplifier designed for use in sound reinforcement systems. It can be configured with up to 8 inputs and 8 outputs, and can be used with a variety of optional modules to customise it for specific applications. The M-9000M2 CU features a range of signal processing and control functions, including tone control, parametric equalisation, speaker equalisation, high-pass and low-pass filters, and a compressor. It also has a built-in delay function, and can store and recall up to 32 scenes or events.