Turn the "Master" volume dial down to zero. Hook-up errors, such as cables in the wrong jacks, can lead to unwanted buzzing and feedback. Prevent this from being amplified and sent to the speakers by muting the output.
Connect a 16-volt power adapter to the jack on the rear of the Peavey PV6.
Turn the Peavey PV6 on using the "On/Off" switch on the rear.
Connect a balanced 1/4-inch TZR cable to each of the "Control Room" output jacks. Connect each to a speaker to send a feed from the mixer. To control the volume of this send, use the "Headphone" volume dial on the rear of the Peavey PV6.
Connect a balanced 1/4-inch TZR cable to each of the "Main Out" jacks. Connect the other ends of these cables to a recording device, such as your computer or hard-disk recorder.
Plug the male end of an XLR cable into the XLR jack on Channel 1. The Peavey PV6 has four XLR jacks, on channels 1 through 4. Channels 3 and 4 have jacks for balanced 1/4-inch instrument cables. The Peavey PV6 can't receive more than one input source per channel, so if you have two mics and two instruments to record at the same time, make sure that channels 3 and 4 are left available for 1/4-inch cables and not used for XLR.
Turn the "Master" level fader up to about 2.
Gradually increase the "Gain" level of the first channel and audition the input source -- by singing into the microphone, for example. If the volume units meter begins to flash, this is a warning that the gain level is too high. Repeat this process for each channel so you have a suitable balance of levels between channels.
Use the "Low, "Mid" and "Hi" dials to tweak the frequency range of each input source. For example, if vocals sound too tinny, reduce the "Mid" and "Hi" levels. If a guitar is too muddy or "boomy," reduce the "Low."