I was wondering if anyone has tried to switch out the rear 6x9 speakers in the g35 to subwoofers like http://www.parts-express.com//pe/sho...number=264-837 or if the first link doesn't work.
I mean, of course with a separate amp. I have the pioneer avic head unit with bose speakers. But I want to put a subwoofer in, but due to the lack of trunk space, I was wondering if there are any alternatives.

been thinking about this also ever since i got the g.

i have rear somewhere that it could cause rattling issues.

can anyone chime in?

To get rid of rattles, dynamat the heck outta everything. You will get some low frequencies from those speakers and an amp, but not as much as you might think/hope. Have you looked into getting one of the enclosures where it goes on the side of the trunk? It really does not take up that much space vs a big box in the center of the trunk. If you end up going with a box, pull out the rear speakers to help the sound get into the cabin area.

And I'm pretty sure JL Audio makes a stealthbox that fits in around the spare tire under the trunk floor mat, which will not take up any trunk space at all, look on their website for it.

I have my stock bose 6x9 amped up right now with a low pass filter, while the the other four 6-1/2 are amped up also but in full range. I can get a decent amount of bass from the 6x9 but not much. Although the bass from stock 6x9 is pretty clean and low when amped-up, I can only imagine having a 6x9 with a higher power handling can do. I'm sure, however, it's nothing that you can hear from blocks away, not like the good ol' 10s and 12s subs.

I'm curious to try some full range infinity kappa, or even bostons, and then installing some crossovers or filters to block the higher frequencies.

damn! the stealth box is 550 dollars!
http://www.shopatron.com/products/pr...r=94159/1451.0

Didn't say it was cheap lol. But I wouldn't buy directly from JL Audio, I would search for it on eBay or Amazon for a lower price. Gotta pay to play.

the 6x9 sub is a good option

its not the best sounding but it works

I dont know about depth of the factory speakers, I own a sedan

I know this thread is ancient but just wanted to provide info for anybody looking to do the Tang Band 6x9 subs.

The install is for an 05 coupe without the Bose system so there were no factory amps or subs but the holes are still there.

I went with the Tang Band's and the small JL amp to keep the weight down vs a normal amp and subs in a box. These cars are heavy enough as-is.

I powered it with a JL Audio MX280/4 and It's running the front channel Kenwood XR-1703HR components, then the two Tang Band 6x9's bridged for 4ohm final on the rear channel. I left the factory rear side speakers powered by the deck.

Installation was pretty difficult. It requires tearing the whole rear of the car apart, seats, seat belts, side panels, everything. The hardest part was probably lining up and drilling the new holes for the speakers. Self tapping screws probably would have been easier but I didn't have any. I had to drill from the underside and there's not much room to lay down back there. I foamed the underside of the woofer and the 6x9 holes on the rear deck because there was a little gap that really can't be changed. I used nuts and bolts to mount the subs. They sealed nicely.

Then I wired everything up and checked for rattles. The rattles were pretty mean. I put some of my speaker foam on the tabs and around the edges of the rear deck but it wasn't enough so I found an old shirt and shoved it back near the 3rd brake light and that seems to have solved it. Then I put everything back together.

As for the outcome, it was sort of disappointing. I wasn't expecting them to be loud by any means, I just wanted to hit some deeper notes. They barely dig any deeper than the front 6.5's. Probably about 60hz at best. Altogether with the other speakers it's not terrible, better than it was before, but I'm not sure it's worth the time, money, and effort. Probably would have gotten better results with JL's 8" ported box and W3 sub and it wouldn't have weighed much more.

I don't blame the subs at all, they're relying entirely on the acoustics of the car. I'm sure the subs perform well in a proper enclosure, but free-air in the rear deck leaves a lot to be desired.

Yep, you would really struggle to build a box for them where they sit too. Thanks for sharing though!

Yep they sit pretty much right on the trunk wall. It would have to be a fiberglass enclosure but even that would be a hard task as close as they are to the trunk wall.

Oh well, still better than it was. Leaves me curious how the factory subs sound.

Minimal at best. Your Granny would comment on the bass being perfect.