David,
The speakers are wired internally with 12 gauge to the woofers and 20 gauge to the uniwave driver. I ran 12 gauge directly to the woofers from the amps, bypassing the terminals, and 16 gauge from the amps to the uniwave terminals. I have bananas on the amp end and bare wire on the speaker end. I'd use bare wire on the amp end but the terminals make it a little difficult.