The goal 140. My previous attempt netted me a 135 and change at 32Hz. You can see my previous build here: Original Build This time I'm upping the anty with a pair of 18s and double the power. A mind boggling 900 watts. That's 900 old school class A/B watts via US Acoustics USB line. Why you ask? Because, they're cheap. The 2150 average about $100 bucks on ebay and the 2080 were about $40, which includes shipping. Here is a run down of the setup: The car: 1994 Oldsmobile Cutlass Cierra A.K.A The Cream Puff Head Unit: JVC KD-HDW10 A basic CD player with a built in HD tuner and RCA outputs Amps: 2 US Acoustics USB-2085 both at 80 watts x 2 @ 4ohms (mids and highs) & 2 US Acoustics USB-2150 both at 450 watts x 1 @ 4 ohms (subs) Fronts: Powerbass 3.5" coax in stock location Rear: MTX Thunder Axe 5-1/4" components Subs: 2 Fi IB3 18" Electical: Stock I'll start off with a quick tear down. Amps coming out. My beloved US Acoustics USB-4085. They'll be back later on for a fully active system experiment. Bye, bye Ascendant Audio Atlas 15s. You were truely one of a kind. You will be missed. Here is my artistic shot from the trunk. The great wall coming down. This on is at a funny angle A side by side of what going in versus what came out. Here is a side shot. the 18 dwarfs the 15. Here is the backside. I've got my fingers crossed that these 18s will make some serious noise. More to come.