I have found Pioneer recently released a small new amp which is rated at 15A too
there is the product link:
http://www.pioneerelectronics.com/PU...eries/GM-D1004
I think I will buy this and used the same wire method as OP, but at same time, I just worried if I only used 2ch and 90 RMS to feed the two door speakers, then the dash and rear speakers won't be power enough for the whole sound stage in car? anyone has any experience about this setup?
Or is it possible to bypass the dash and rear speaker input from HU, so I can wire in parallel then feed dash and rear speakers in 2CH 45w, and the other 2ch 45w goes door speakers.