Setting up a new audio system is a breeze when you have Hertz DIY car speaker installation supplies. Their useful hardware includes aluminum sound rings that seal the speaker against interior mounts, preventing the loss of sound in door cavities or the trunk. Hertz also makes extension cables, speaker wire, audio splitters and other accessories you might need. If you want to leave it to the professionals, call us to schedule Hertz speaker installation at a brick-and-mortar store.