want more bass? .... then open your sunroof!

[tcguy85 10+ year member]

i always knew it sounded like there was a slight difference in bass response with the roof open and closed. so here is a chart of the sub-bass response in my car with it open and with it closed. there is a 7db difference at 20hz, a 5db difference at 32hz, and a 2db difference at 40hz. at 20hz and 32hz those are pretty big jumps with it open, the 2db jump at 40hz is a small difference but it's still there.

i'm using the sub thats in my signature. it's placed on the left side of the hatch firing to the right side.

here is the chart

Click to read more...

 

[97gp 5,000+ posts]

I dont have a sunroof //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

 

[tcguy85 10+ year member]

I dont have a sunroof //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

i guess opening a window might do the same, but it would probably let in more wind and road noise. i remember reading quite a few times on here that opening a window will get you a higher number in a DB Drag.

but the way my sunroof is i can drive around up to about 50-55 mph and not even notice it being open. i don't hear any extra wind noise till i'm over 55 mph.

 

[revrider1 5,000+ posts]

Interesting

 

[Fender5 10+ year member]

that's awesome. i have the windows down but rarely open the sunroof. I'm going to do it more often.

I ran my DB drag with windows up. It sounded louder windows up and i have a sealed box if that matters. the bass hits cleaner with windows down. it sounds fuller with windows down

 

[tcguy85 10+ year member]

this of course maybe vehicle dependent. remember that.

 

[Rashaddd 5,000+ posts]

yep opening window/door does the same, thats why its called outlaw when ur getting metered, vs legal which is sealed up (harder to get as loud, especially in smaller vehicles and at lower frequencies)

 

[speedfreak28 10+ year member]

this of course maybe vehicle dependent. remember that.

was about to say that but still substantial changes none the less.

 

[22mountaineer 10+ year member]

Nice, I also thought that by sound of ear but thought it might be an illusion, when I went to a comp I cracked mine though... Did you open it all the way or what?

 

[azimuth 5,000+ posts]

 

[tcguy85 10+ year member]

Nice, I also thought that by sound of ear but thought it might be an illusion, when I went to a comp I cracked mine though... Did you open it all the way or what?

i could have opened it another inch if i wanted to, i opened it to the spot i usually open it to when i have it open.

i thought it was cool to see the results. i was messing around and figured i'd pop it open to see if my ears were tricking me or not.

it is also cool to know that my single little ten thats tuned to 30hz can still extend all the way down to 20hz flat.

 

[Notloud00 10+ year member]

no. two windows down>sunroof by far.

 

[tcguy85 10+ year member]

thanks, i just thought it was cool to SEE the results instead of thinking that i could HEAR a difference. just figured i'd share my proof.

 

[tcguy85 10+ year member]

no. two windows down>sunroof by far.

thats cool, but i can drive up to about 50 mph and not even notice the roof being open.

sunroof > windows when you care about wind and road noise.

 

[azimuth 5,000+ posts]

thanks, i just thought it was cool to SEE the results instead of thinking that i could HEAR a difference. just figured i'd share my proof.

i just thought it was a funny picture. no offense