I was going to have a kicker under seat sub installed, and I was advised against it (by a couple people here) and the guy at the shop who was going to install it.
He suggested getting an Audison SR5 (5 channel) , using stock speakers and adding a sealed sub box in the trunk.
There are essentially no reviews on the amp online! The specs look good ... 50wx4 + 185wx1 with a built in processor that will supposedly clean up and enhance the existing HU output.
He seems confident that I will be very happy. But he's also hoping to sell me a 600$ amp and 150$ sub box, which is going to put me 500$ above where I was going to be with the kicker under seat +install.