Speaker Design Methodologies

[Gcollier]

Hello everyone!

I just wanted to take a little survey and see what the general consensus is on speaker design methodology. Also I would like to know what software people are using to make their measurements. My goal is to clarify a few areas, mostly some measurement specifics...but for know I'll start broad.

My system right now is as follows:

1. Choose a set of drivers and order them (I'm comfortable enough with this aspect, but if anyone would care to elaborate on woofer tweeter pairing feel free).

2. Measure the drivers, I use LSPLAB for both impedance and frequency response measurements. (Anyone care to elaborate on good methods for obtaining anechoic response results, voltages used for making the measurements, mic/speaker positioning etc....)

3. Calculate the TS parameters of the driver using the impedance response curves, I use the added mass method (any suggestions on choosing the right mass for a given driver)

4. Use your favourite simulation program/programs, and determine your box dimensions. (Lots of choices here, UNIBOX is nice)

5. Build the test box.

6. Put the drivers in the box and measure impedance and frequency response for each driver again....are they even close to the predicted response????

7. Use the results of the in box measurements to design a crossover...with a lot of help from various peices of software.

8. Build and test the crossover.

9. Measure it all again and see how it actually sounds.

If anyone would care to elaborate on any of these aspects please do so. I may eventually compile the information into a webpage.

Thanks.

G.

[johngalt47]

I think #1 in the list is crucial and I wish I knew how the experts determine which drivers work together the best without a lot of trial and error.

[Dumbass]

Steps 1 through 9 describe the well-trodden design process for a very specific genre of speaker, namely direct radiator two- or three-way vented or sealed cabinet.

I'd put a lot before step 1, for example evaluating your goals for the system, what sort of amplification you wish to use for it, your financial budget, whether you wish to use direct radiation or horns, in what sort of room do you wish to use them, etc etc.

And furthermore, the process of auditioning as many different types of systems as you possibly can is, I believe, crucial. You might find yourself going in a MUCH different direction than you initially considered, if you open your ears.