Trunk rattle.

[accident]

Also running my sub without porting to the cabin. It's pointing outward toward the back of the car and it sounds and feels great. The cone also jumps a good inch from the box. :D

[Red88]

looking forward to my amp n sub arriving from cali when i can try this for myself. ive heard a lot about e30s being bass-proof, so its a bit surprising to hear a trunk box with no cabin venting working so well (other than the rattles). I will have skihole and both rear mids out, but will experiment progressively, then with sub orientation/placement within trunk itself...

it's pretty good, it shakes the seats and is VERY clear to me and my passengers. everyone is impressed. the guy I bought the car from was really impressed because he had the same idea you have. mine isn't too bassproof, I guess.

[robspeed325i]

looking forward to my amp n sub arriving from cali when i can try this for myself. ive heard a lot about e30s being bass-proof, so its a bit surprising to hear a trunk box with no cabin venting working so well (other than the rattles). I will have skihole and both rear mids out, but will experiment progressively, then with sub orientation/placement within trunk itself...

[StereoInstaller1]

interesting... i wonder how much it would improve by removing stock mids...

Maybe 5% at best.

In terms of pressure waves, it just won't matter much. Might gain 1 or 2db, basically a change not audible to 99% of the population.

The biggest improvement would be the drop in SPL of the mids/highs, which the car would lose about 6db of midrange, but the audible difference would be bigger than that, since it would (logically enough) bring the stage forward radically...so it would seem like a huge improvement, but in reality, a tiny change.

[robspeed325i]

interesting... i wonder how much it would improve by removing stock mids...

[Red88]

how are you venting to the cabin?

not at all. you can hear, and feel it fine.

[robspeed325i]

I have the other two carpet-holder-uppers, I was eager. I built the box, and wired it all. It's just two twelves that move every piece of metal in my trunk.

Next step: Dynamat.

how are you venting to the cabin?

[StereoInstaller1]

Not gonna happen. The only time I wished my e30 didn't have a sunroof :P

I have never wished for a solid roof, that is fo sho.

I am gonna chop the roof off of a spare E30 at Joe Funks shop...if he ever finds one without a crushed roof.

Then, I am gonna make a new headliner out of E36 or E34 parts, and reupholster it.

THEN, I am gonna take the entire sunroof cartridge out of my car and re-enforce the roof, and reinstall all the crap I built for it.

Estimated completion: 2/2012...just before R3Vpocalipse

[808BMW]

Trunk rattles are easy.

My roof moves a good 1.5"...try fixing that rattle!

Not gonna happen. The only time I wished my e30 didn't have a sunroof :P

[NOMAD]

wow.

Don't set anything on the rear shelf, it'll get swallowed by the tubes.

Try this for a rattle: My wife's car was rattling and i found a handfull of change that had rolled into the underseat OEM Subwoofer!

[StereoInstaller1]

One more showing the top of the port tubes:


Keep in mind that this will make better (and more) bass on 1/10th the power.

Luke

[StereoInstaller1]

1 12" Exile sub on 600 watts in an ultra high tech box.

The port tubes are almost 30" long, to achieve the tuning frequency that gives me bass below 20Hz, yet achieves about 115db with 1 watt, in my car.

[Mr Watsonsilver]

WOW what do you have for a system?

[StereoInstaller1]

Trunk rattles are easy.

My roof moves a good 1.5"...try fixing that rattle!

[Mr Watsonsilver]

That sounds pretty extensive for me to do.