BASS: Small Enclosure better than Door Sealing & Dampening?

[perfecxionX 10+ year member]

- you need to maximize the ideal Vb of the enclosure

what does this mean?

 

[modskwod 10+ year member]

Ideal box volume. This is assuming Vb=Volume of box.

 

[90MaximaSE]

what does this mean?

To expand on modskwod's answer, and also give you a better insight into FoxPro5's post:

They are referring to designing a speaker enclosure using one of the popular speaker box design programs. WinISD Pro is a free one that lots of people using; mostly for Subwoofer box design. These programs show you sound frequency curves (Bass response) for the speaker and enclosure used.

This is were I'm headed with my work and is my next intermediate stage in the Build design for my Maxima. First step, what I'm doing now, is "Maximizing Vb" ==> figuring out what practical enclosure volume I can fit into my car door based on a 6.5" mid-bass driver. Then I'll run WinISD Pro and see what the Bass response looks like for that preliminary enclosure.

Here's a link to 'WinISD Pro Tutorial and Download':

http://www.hometheatershack.com/forums/diy-subwoofers/6330-winisd-pro-tutorial-download-detailed-guide-how-use-winisd-pro.html

Another useful link - Thiele-Small Parameters glossary. Usually referred to as 'T/S parameters', they describe the characteristics of a particular speaker, and you have to have them to input those into WinISD Pro for box design.

http://www.the12volt.com/caraudio/thiele.asp

The problem I'm running into is obtaining the T/S parameters for the mid-base driver (speaker) used in the component sets I'm looking at - like Polk's MM6501 and Pioneer's TS-C720PRS. Kenwood gives them in the manual that you can download from their site. Pioneer, Polk, and Boston Acoustics don't publish these parameters.

However, T/S parameters are given for individual speakers (drivers) of other brands on sites like Parts-Express.com and Madisound.com. Using these individual speakers seems to indicate, at this point, coming up with our own crossovers, going bi-amp to drive the tweeter and mid-bass separately, or both.

I've e-mailed Polk Audio for T/S info on their MM6501 6.5" driver- no response yet. I'll probably wind up calling Polk Audio, Pioneer, and Boston Acoustics to see if I have better luck that way.