Just sayin' -
After I added the Alpine amp, I can hear more musical details than before so the volume doesn't have to be turned up as much to hear the music. My Alpine deck plays DVD-Audio (downmixed to 2 channel) and DTS discs (2.0), so I can really hear the nuances especially on Jazz recordings. The deck's FM tuner is just as impressive - I can pull in radio stations from far away using the stock Nissan antenna! And best of all, the sound quality is great. Can't believe how good it sounds.
Going to Home Depot to buy some wood to mount another amp and build a sub enclosure.
Also, I ran power to the red (+) terminal of my battery and grounded the amp to the sheet metal under the passenger's seat. I assume this is correct? Just need to buy a fuse. Car audio experts, please advise.