FAQ How can I troubleshoot humming or similar issues with the Peavey 118P speaker? You can try lifting the grounding on the symmetrical XLR cable at the end pointing to the QW-118P, using the Ground-Lift switch 10b.Can the Peavey 118P speaker be used as a full-range power speaker? Yes, it can be connected directly to most full-range power speaker systems.What frequency range does the Peavey 118P subwoofer cover? The subwoofer covers frequencies from about 40 Hz to 20 Hz.