I have about 30 hours in this box, I could have done it quicker but sanding the inside to have no screw holes or imperfections ending up being a little time consuming than I had hoped, it doesn't help trying to be a perfectionist:)
Just got it up and playing today on a single T1500 @ 2ohms...waiting on the second one to really give it the power it needs. Got down with authority all the way to 28hz as is.
Got the opportunity to go a little overboard and build this unique enclosure for a long time friend of mine
DC Audio XL M2 15 with carbon fiber dust cap and direct leads
SMD heavy duty speaker terminal with custom painted logo
Kerfed-port enclosure with fully painted interior and acrylic viewing window
Multicolor RGB LED lights
3D raised DC logo with black acrylic overlay
Soon to be powered by 2 Rockford Fosgate T1500's in a Jeep Cherokee
Hell ya voltage drop, two batteries and one alternator isn't nearly enough for two T40001's but I'm saving my pennies up. Here's a link to the build of this console.
http://www.stevemeadedesigns.com/board/topic/151152-custom-console-build-3sixty3vu-metersdouble-din-1989-jimmy/