I'm the kid wanting a 2001 SSEi as my first car, and I'm also a major basshead. What would be the best way to fit two 15's in the trunk??

Well obviously the trunk itself is quite large, so the enclosure you use is up to you. To connect subwoofers to the car's stock Bose system, you'll need a line output converter. You can tap into the wires of the 6X9s in the rear deck to get your signal, and then plug it into the amp of your choice.

Before I installed an aftermarket head unit, I was using one of these:
http://www.crutchfield.com/p_142SLC4/Sc ... 505&awdv=c

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-Car Guy Carl
"Penelope" - 2003 SLE - 247k Miles
"Sydney" - 2000 Honda S2000 - 98k miles

Thanks, I knew about the line out converter and how to get it hooked up. My main question is how do I attach the box to the trunk so it doesn't move around when I turn a corner or something?

I have yet to figure that out in an elegant fashion... I propped the subwoofer in the back right corner of the trunk, against my tool box... Using an ice scraper. LOL!

You can potentially use bungee chords or maybe even velcro on the bottom of the box.

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-Car Guy Carl
"Penelope" - 2003 SLE - 247k Miles
"Sydney" - 2000 Honda S2000 - 98k miles

Looking for something more permanent but the velcro idea is simple enough. I'll just do that then. Thanks!

Does the trunk mat have a backer board or is it a floppy piece of fabric like 92-99? My G8 has a backer board and a couple pieces of Velcro work well.

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WHITE WHINE - 1992 SSE Supercharged 236.26 ci (.040 Over) 15.090 at 90.2 MPH on old engine w/ slipping trans & melted O2 sensor - Gen 3 M62 and matching TB, Gen 2 Pully, Zillamotorsports Ported LIM, YT 1.72 Roller Rockers, SII FPR & Injectors, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers & a 10" Alpine Type R Sub, all the watts, 140 amp Alternator, Ricepipe CAI w/ heatshield, Pilot Angel Eye Foglights, Clear Corners, '02 17" Chrome Bent 5's, Magnaflow F-Body Muffler and Hi-flo Cat, Ceramic Coated Ported Exhaust Manifolds, Fan Override, Monroe Reflex struts, red calipers
2009 G8 GT - Sport Red Metallic, loaded, SOLO Axlebacks, Rotofab Intake, Tuned, autodim mirror, removed intake manifold cover, HSV GTS triple gauge pod, two tone red-hot shifter and HSV SuperSport steering wheel, GXP rear sway bar and diffuser, 3.45 diff and various Camaro suspension bits, LED Taillights

Sadly, it's just a floppy piece of fabric.

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-Car Guy Carl
"Penelope" - 2003 SLE - 247k Miles
"Sydney" - 2000 Honda S2000 - 98k miles

An idea I had that I never had a chance to implement was to remove the plastic cover and use some self tapping screws and fabric or flexible metal straps affixed to the metal bracing on the back of the seat

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2000 ssei gone but not forgotten

Current fleet:
2009 G8 v6, 2009 Avalanche LTZ, 2013 Volt

or go through the plastic cover into the metal. just make sure theres nothing behind it when you do. also make sure not do go too far in through the backseat into the foam or springs lol

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2003 pontiac bonneville Sle with kenwood sound system. Upgraded tweeters, door speakers, deck speakers, kenwood sub and amp. Rage r20 18inch rims. Front and rear KYB shocks and struts. GXP Strut tower brace.. She's a work in progress still

I used eye-hooks screwed into my sub cabinet, and then used bungee cords to hook onto frame openings in the trunk.
Alternatively you could do it the other-way-around and screw eye-hooks into the metal frame behind the seat cushion and strap them around your sub, *or* put eye-hooks on both and bungee between the eye-hooks. I used thin bungee cords, maybe 3/8" thick so they weren't too obtrusive.

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PontiacDad at WCBF `08: "By any chance, was his name. . .Radomir?"

R.I.P. 10/31/15: 1997 SE: "Silver Shadow"
`05 Mercedes S500

you sir are ingenious..... im definitely doing this idea

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2003 pontiac bonneville Sle with kenwood sound system. Upgraded tweeters, door speakers, deck speakers, kenwood sub and amp. Rage r20 18inch rims. Front and rear KYB shocks and struts. GXP Strut tower brace.. She's a work in progress still

If you are planning on a custom box, build it so that you can actually use stainless hardware to bolt it down. And use lots of sound deadener and a very heavily braced box.

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-Bailey Billman-

[size=85]1993 SE, silver, Rockford Fosgate everything.