Check out the user interface for Beale Street Audio BAV2500 (1000W, 2 Channel) and BAV4250 (1000W 4 Channel) Amps. The BAV2500 and BAV4250 amplifiers can be configured for 4/8 ohm zones, it can also be configured 70/100V or can be configured for any combination of 4/8 ohm and 70/100V zones all at the same time. Have one zone delivering 8 ohm, while a separate zone delivering 70V, simultaneously.