Finally got my Lucids with the Polk DX4 4" 2-ways installed. I have to praise Lucid for very quickly fixing a problem with the first harness. Send out a new one by priority mail the same day, and the new one was flawless. FWIW, the 4" Polks behind me sound clearer (mid range/vocals) than the 6 1/2" Infinitis in the door. I wish I could steer the door speakers.