Perception of Bass increases on opening the doors! Am i crazy?

[frankmehta 10+ year member]

I just installed a system in my new car, and believe it or not, but I feel the lack of bass at higher gains (Eclipse 7200 on a DPX11551 paired with a W12Gti!). But as soon as I open the door/window, i feel the bass to be hitting louder and harder. What EXACTLY is wrong with the install (or me?

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[SPLluminator 10+ year member]

nothing is wrong.

 

[KyleBechtold 5,000+ posts]

my car is louder with drivers down passenger up

 

[Trey803 5,000+ posts]

The acoustics dramatically change when the doors/windows are opened. For one it increases your car's volume to infinite and also changes how the waves are reflected

 

[frankmehta 10+ year member]

one more quick question.

My car is a sedan with a 400 litre boot, and the subwoofer (in the boot) is getting the better part of 1200 W of RMS power.

Is it recommended that I make an air vent for the sub (hole in the parcel shelf to let the air into the cabin)

Will this change things? I feel a lot of frequencies are missing. Is this due to air lock or incorrect Xover settings?

 

[cx-7heaven 10+ year member]

If you vent the trunk to the cabin, you will get better bass in the cabin. the last one I did was a simple 6 inch by 12 inch hole in the rear deck, then made a frame out of some scrap wood and stretched lycra(speaker screen) over it, dropped it into the hole and bam! vented trunk. Sounded much better