I have a honda accord 99 with a trunk vent (8"x3" slot) behind the paneling on the driver side. I notice the other day that there was a lot of air leaking through there when the bass note hits. Would sealing this up help with spl and is this bad for the car? My box is in the trunk sub and port facing back.

Just wanted to know if anyone had this problem and what did you do to it?

How else is the trunk vented to the interior?

I should have mention this vent is going to the outside of the car on the rear driver side panel. Venting in the car is done by having the center armrest down or the whole back seat folded down.

I had that problem with the Prelude, got one on each side in the trunk! Just cover it with some sound deadening material.

As mentioned above seal it up the best you can.

Hey Ludeman, did you seal the two vents on your prelude? If you did, what kinds of difference did you see?

Those vents are there to equalize pressure inside and outside when you open and close your doors.

Does that mean it's bad to seal them up? Will I gain any dbs by doing so?

most likely wont make a difference unless the port is firing directly into it. ive sealed mine in my cavalier and it didnt gain, didnt lose either. so i just unsealed them.

I sealed the ones in my Acura CL and gained like a .3 or so, make the trunk hard to close.lol

Hey Ludeman, did you seal the two vents on your prelude? If you did, what kinds of difference did you see?

Never got metered with the vents opened.

I sealed the ones in my Acura CL and gained like a .3 or so, make the trunk hard to close.lol

That's because you're pressurizing the air inside when you close it if the vents aren't open.

Well, I've been on the idea that I'm going to close my vents as well... but then brainstormed ant thought it has few effects.

1. Harder to close doors/trunk via to pressurized air cancellation. ( something i wouldnt care about)

2. Recirculation of a/c and heat. Theres usually two options when using your air in the car. One where it circulates air inside the cabin only. and the other where it accepts air from the front vents without having to use a fan. But when you close the trunk vents. Your eliminating the "air in = air out" physics. And you will not have proper ventilation in that regard. (something i use often)

3. air bags deployment. Again, with no where for the air to move to as the air bags deploy...physics say that the speed and size of the air bag will not be as engineered with the rear vents covered. (pretty damn important)

With a daily driver..and as mentioned above at a .3 DB gain. I'd leave them uncovered. When I do choose to go to a show and meter my system. I will temporarily cover them and see what difference i get, but imo, the negatives outway the positives if the vehicle is your main source of transportatoin.

any mods that make the car less safe, just for the sake of improving bass output, are fucking stupid for a daily driver.  there's probably a ton of better, safer options to improve output and scores