I've installed just a handful of "systems", but this was definitely a first for me. Installed a Soundgate 2 channel 85watt model LOC, behind the stock HU in a 2006 Nissan Pathfinder. Used the low budget (+/- 70 bucks)Clarion APX 2121 amp- 60 x 2 @4ohms I believe. Speakers were the shallow Polk db650s in the front doors. I was surprised, it really sounds good; if you want to keep your stock HU, I can highly recommend the Soundgate product. Ordered them both off of of
amazon. Hope the amp hangs in there.