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-   -   6x9 Speaker Boxes (http://www.diyaudio.com/forums/car-audio/18229-6x9-speaker-boxes.html)

Drivetime 26th July 2003 09:10 PM

6x9 Speaker Boxes
 
Hey, I'm getting ready to install some 6x9 speakers. I need some boxes built and I was wondering if there was a specific amount of volume I need for each speaker.

Bill Fitzpatrick 27th July 2003 03:11 AM

yes

Drivetime 27th July 2003 03:22 AM

Duh
 
Really Bill? I couldn't have figured that out. Now either you're really cocky or you don't know anything. So if you do know what volume I need then you could be helpful and tell me. If not, try to find someone eles who uses this board for something other than what it was meant for. Thank You.

planet10 27th July 2003 04:00 AM

Every speaker will want to see a different volume....

dave

pinkmouse 27th July 2003 09:41 AM

If your driver manufacturer doesn't give you an ideal volume, you will need to measure the response curve. Do a search in the Loudspeakers thread for loudspeaker testing, there's loads of relevent stuff. ;)

planet10 27th July 2003 04:21 PM

Re: Duh
 
Quote:

Originally posted by Drivetime
Really Bill?
Don't mind Bill... sometimes he comes off as a cranky old guy, but he is quite knowledgable and we love him.

What kind of speakers are they? Brand, model? Any specs at all?

Car speakers usually don't come with specs, and if you can't measure them there are some approaches to cabinet building, which thou they may not be optimum, will give you a good shot under limited circumstances.

dave

Drivetime 27th July 2003 04:45 PM

They're Pioneer TS-A6963 6x9 3way speakers. I checked the box and it dosen't give an optimum volume. I was gonna do some searching on the net and with some audio stores around here but if you know what volume i need, that'd be great.

Bill Fitzpatrick 27th July 2003 07:04 PM

Re: Duh
 
Quote:

Originally posted by Drivetime
Really Bill? I couldn't have figured that out. Now either you're really cocky or you don't know anything. So if you do know what volume I need then you could be helpful and tell me. If not, try to find someone eles who uses this board for something other than what it was meant for. Thank You.
Well excuse me!

If you already knew the answer to your own question why did you ask it in the first place?

planet10 27th July 2003 07:41 PM

Quote:

Originally posted by Drivetime
They're Pioneer TS-A6963 6x9 3way speakers.
Generally these are designed to sit in the back deck & have the trunk as a box so they like a big box. Bigger than you are likely to be able to build & live with.

So my recipe would be: 1/ build as large a box as you can get away with. 2/ drill a number of small closely spaced hole (with a total area of say a third the Sd of the speaker. Damp these "ports" with some compressed fiberglass insulation. The fancy way to do it is to rebate the area where the holes are (say 3/8" if you are using 3/4" material). Then take some fiberglass (as per the example 2" thick), compress it into the rebate, and hold it down with some of the plastic eaves-trough mesh. (This works best if the holes are in a long narrow configuration). Tuning is by increasing or decreasing the damping or the total area of the holes.

What is happening is that by putting the speaker into too small a box, you get a high Q response... the damped port then tries to lower the Q.

dave

planet10 27th July 2003 07:43 PM

Re: Re: Duh
 
Quote:

Originally posted by Bill Fitzpatrick
If you already knew the answer to your own question why did you ask it in the first place?
Bill... you have to take the question a little less literally... what he is really asking is "how do i figure the ideal box volume for a specific speaker"

dave


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