Originally Posted by Gannicus

So you have some great components. All your speakers and HU are golden. The RF amp is also good to go. The weak link is the BT 4180 amp. Doesn't do well with the Hertz speakers. Almost like it doesn't have enough power to push em. The specs are 180 watts on that amp but it's a weak 180 watts. I think my friend AAWAV bench tested that amp at 150w. Doesn't do rated. On top of that it's not a warm amp and the Hertz speakers need a warmer amp. Sell it and go with a JL 600/6 and it will be a night and day difference.