Help measuring drivers!

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I Bought a pair of Drivers and a SUB almost a year ago (Dainty) but unfortunately still could'nt get them together because I cant find the propper T/s Parameters (the ones posted on this forum dont match the serial Nos of the ones I have), So I downloaded the Speaker Workshop Software to measure them But my knowledge on electronics suck :bawling: !!! is there anyone from Hyderabad India who could test them for me? Or someone walk me through the whole process? I really need some help here.


I have 5 CNC Wood Working machines capable of making any Conceiveable Enclosure and tons of MDF but not the faintest clue as what size should the boxes be!!
Joined 2000
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There are several books on speaker box construction that show basic test rigs for getting T/S parameters.

David B Weems and Vance Dickason wrote a couple of books.
Testing Loudspeakers by Joe D'Appolito is very...scientific. If you are good at math, go for it.

You have the means to make test boxes, that's to hardest part, I thinks. I mean test boxes for calculating VAS, one of the three params you need.

Or, there is this contraption:

Good Luck,

Do you have a multimeter, a PC with soundcard and a good quality power amplifier with flat frequency response? I have a PDF of full instructions that I would like to have run through by a beginner such as yourself for comments/feedback. If you are prepared to spend a little while reading the 5-6 pages and conducting some tests then I will send you the document and I'm sure it will be a success for you. If you don't feel that you want to do this yourself that's fair enough, no problem.
Just another Moderator
Joined 2003
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Pat, have you downloaded the unofficial speaker workshop manual? Workshop Manual

memofer said:
Sorry to steer abit off topic, but, how does one measure the frequency response of an amp.?

This is what I use in conjunction with a preamp between the amp and the PC (so as not to overload the soundcard (though if you are carefull and measure the output voltage before connecting to the soundcard, you could get away with not using the preamp.... The one I have was designed to be used with osciliscope software... As Richie00boy says, you need a good soundcard.... I have an Audigy II ZS, which IMO is excellent for this task.

Here is an example of a test I did of my amp, and the soundcard preamp a while back.... note that my amp is in the doghouse at the moment :(

The SC preamp curve is the sound card preamp. the preamp only curve is the preamp section of my amp, and the other is the whole amp, pre and power.

this one shows the freq response of the sound card, and the response of the soundcard preamp, before and after modification (basically increased the size of the coupling cap on the input of the preamp).

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