I've seen setups that left the pass-though, but the speakers were pointed into the trunk instead of forward (focused on the latch). Not much room to point 12" subs into the car with that configuration.
I was going to use the pass-through to house the EQL and the amps, but I got in a hurry (Christmas time, no bass for 6 years, impatience, a few days left of being out from surgury).
I'll fiddle with it when I have some of that time stuff...
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2003 GP GTP
Victory Red
Mods: Pulley Boys 3.4" pulley, JimmyC downpipe /w cat, MSD 8.5mm plug wires, Taylor plug boots(Red), NGK TR-55 IX plugs, Thasher CAI, MAP Throttle Body Spacer, MAP Exhaust heat shield, GMPP handling upgrade kit, Energy Suspension Poly bushings, 97-02 Lotek A-pillar(3 gauge), Autometer Sport-Comp guages (boost, oil pressure, transmission temp), SilverStars Halogen bulbs, Blazertech 2200 foglights, Hawk HPS pads, F-body brakes, and rebuilt tranny....