Technivally you could but you will lose the ability to fade or balance your music. It's better for you mids to have thee own signal. Cuz if you have an issue later with your sub amp you don't want to have to be rewiring RCA's.
You would see a big difference. Although the hu says 18-23 it's more like probably 10-15. Most hu and amPs do not put out what they say. Unless they are 100% efficient. Its more like 75-80% of stated power. So for what you are looking for getting a 100x2 gives you more useable power and room for upgrading later.
Whats real funny is when lames think the higher the temp the brighter the light. That's why you have losers driving around with purple headlights. With so much info on the net, how can people still be so ignorant.
http://www.stevemeadedesigns.com/board/topic/77708-2002-millenia-system-re-build/page__fromsearch__1
Also with the photobucket pics you need to copy and paste the 4th link if using mobile to post pics.
This is how my first build came out
Well here is the latest update. Took a few days off, now 'm back at it. I wrapped the box and made some trim panels in a nice two tone scheme.
take it real slow with the jig saw. I you still have issues, cut a bit smaller on purpose then sand the rest to get it straight. Or just get some clamps and clamp some scrap wood to make a straight line jig for your saw.