The EPAK2500 is a four-way, active control and amplification system specifically designed for the KV2 Audio ES Series™ modular loudspeaker systems. It houses all signal processing and amplification as well as providing control for six different subwoofer cabinet configurations, powered by the internal subwoofer amplifier, along with providing control signal to an external VHD3200 subwoofer amplifier to power further subwoofer cabinets if needed. Each amplifier in the EPAK2500 perfectly compliments the transducers it’s coupled to. They are therefore very different from each other with respect to construction and purpose. Mid / High Amplifiers. Both the mid and high frequency amplifiers inside the EPAK2500 are Class AB, Push-Pull amplifier circuits using (MOSFET) Transistors output stage devices. The entire performance strategy for this type of design is based on producing the lowest inter-modulation distortion possible and the highest audio quality in the critical mid and high operating bands. Both amplifiers are coupled to the mid/high drivers through transformer balanced speaker outputs.