The C 68:4 Delivers 4 × 1700 W at 4 OHMS, Making This Amplifier Powerful Enough for the Vast Majority of Demanding Installed Sound Applications. The C 68:4 delivers 4 × 1700 W at 4 ohms, making this amplifier powerful enough for the vast majority of demanding installed sound applications. Packaged in a compact 2U chassis, the C 68:4 sets a new standard for high power in an installation-dedicated amplifier.