Can I have a av cable and hdmi cable plugged into ps3 at the same time ?

Have purchased some Comm-Play Stereo Gaming Headset CP-PRO headphones, however I normally Connect PS3 via HDMI cable, but these headphones have a usb cable (to power the headphones) and a red and white cable for audio. So for a solution am I able to do the above ? Any ideas would be appreciated.