resonance with components...

[dazz 10+ year member]

i have a set of components that were in my car... i was running them in my doors without any type of enclosure/baffle... i added some foam speaker baffles... i lined them with sound deadening and filled them with polyfill (not very much since the speakers are just slightly smaller than the baffles)... now i get a resonance somewhere in the vocal/midrange area... at a certain frequency with voices (probably under 1khz) i get a harsh bite... any other frequency sounds fine... what can i do short of removing the baffles to fix this problem? there is a 10 or 11 band eq with a 1 band parametric eq... could i utilize that to help with the problem? the reason behind me using the baffles is that the doors in my car arent sealed... with most cars the outer and inner door skins are locked together (the outside sheet metal is folded on top of the inside sheetmetal), but with mine they are 2 separate pieces that let the elements in (about a 1/8-1/4 inch gap between the 2)... the doors dont leak when its wet (doesnt get dirty at all inside the door) but in the winter time the speakers sound off for the 1st 10 minutes or so (which im sure isnt good that im playing them while they are like this)... sounds to me like theres some moisture getting in and freezing...

is the only solution for me is removing the speaker baffles when its warm and just putting them back in for the winter? or will i be able to tune the resonance out with the eq

thanks

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[Cris 10+ year member]

I see the problem. I would recommend you do this: cut a hole (like a rectangle) at the bottom of your baffles. When I had baffles, this allowed the midrange to breathe (as it was designed to work. It wasn't ever designed for a baffle or box behind it) and since the hole was at the bottom, no water was able to leak into it at all. I would give that a try; it helped me out. Allowing it to breathe would, in my logic, remove the resonance.

 

[fo0manchu 10+ year member]

I see the problem. I would recommend you do this: cut a hole (like a rectangle) at the bottom of your baffles. When I had baffles, this allowed the midrange to breathe (as it was designed to work. It wasn't ever designed for a baffle or box behind it) and since the hole was at the bottom, no water was able to leak into it at all. I would give that a try; it helped me out. Allowing it to breathe would, in my logic, remove the resonance.

thats what i was gonna say.

 

[dazz 10+ year member]

ive already thought of that... thats the easy way out... //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

my problem is during the winter, the speakers sound off for about the first 10 minutes or so before they warm up... does it sound like i have a problem with moisture getting in the speaker and freezing or the surrounds getting hard in the cold and preventing proper movement (someone suggested this, not 100% sure)?

summer time they are perfect...