My CP-AS1080 Active Subwoofer is Distorting When I Turn the Level up Higher than Zero

If you are connected to the high level input of the CP-AS1080, you must set the level to zero and control the volume from the source/head unit. Over-driving the unit will damage the sub-woofer and/or the internal amplifier.

If you are connected via RCA cables (low level), you may have a sub level control on the source/head unit that could be set incorrectly, or try level matching the CP-AS1080 to gain better control over the sub-woofer.