tankhokie Posted November 14, 2002 Share Posted November 14, 2002 I can't find my trusty ole speaker building book, but I was wondering if anyone knew what the measurements that you need from a sub if you were going to build a box for it? Then, I wonder, how do you measure things like (I'm guessing here) coil diameter or spider diameter...etc without becoming a "cone surgeon" RF3-II RC3-II RS3-II Denon AVR 2802 Sub-DIY in progress Quote Link to comment Share on other sites More sharing options...
WMcD Posted November 14, 2002 Share Posted November 14, 2002 Generally you need the Thiele-Small parameters of Fs, Qts, and Cms. These are published in catalogs. They can be measured with the help of some equipment but is probably not worth the effort when they're available from the manufacturer. Some distributors will sell you a driver and a box and amp as a kit. Consider the Titanic series sold by Parts Express. It is probably as close as you can get to a Heathkit type of project. Overall, I think it is important to maximize the fun and minimize the headaches, or uncertainty, by something like that. The physical dimensions of the spider and the like may be something the pros use to select one driver over another. However, you don't need those to make a sub box. Gil Quote Link to comment Share on other sites More sharing options...
prodj101 Posted November 14, 2002 Share Posted November 14, 2002 yeah, there is no standard box size that works with all drivers. one 12 inch will sound good in a 4 cubic foot box, while another may sound aful. you need to find of the parameters, and build the box to that. Quote Link to comment Share on other sites More sharing options...
tankhokie Posted November 16, 2002 Author Share Posted November 16, 2002 Thanks guys, but one problem, the two drivers I have are around 1992 era and I can't dig up any info on the net about them. Thus no numbers for a box. Anyone know a good place to find older speaker parameters? Quote Link to comment Share on other sites More sharing options...
BerndH Posted November 16, 2002 Share Posted November 16, 2002 The attached and zipped Excel file contains the T/S-parameters for more than 1200 drivers. Found somewhere on the net. Bernd drivers.zip Quote Link to comment Share on other sites More sharing options...
tankhokie Posted November 16, 2002 Author Share Posted November 16, 2002 Bernd, Thanks a lot, unfortunately it did not have my subs on the list. Back to the search for T/S parameters... Anyone else got any suggestions? Quote Link to comment Share on other sites More sharing options...
Stig Posted November 16, 2002 Share Posted November 16, 2002 tankhokie, give us the brand name and model# of the drivers... then someone might be able to steer you in the right direction Quote Link to comment Share on other sites More sharing options...
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