Is there a service to measure driver parameters?

[Bamalama]

Does anybody offer driver parameter measurement as a service?

It could be anyone from a manufacturer to a diyAudio hobbyist, if he's reliable.

The drivers in question are from an old Infinity RS325, if anyone incidentally happens to have the parameters available.

Thanks

B

 

[OllBoll]

Unless it's xmax and such you want then shouldn't it be more simple to just use acoustic measurements + impedance?

A calibrated UMIK-1/UMM-6 and some adapter cables for your sound card might even cost less than sending the driver for parameter measurement, and then you will have a microphone to use when designing the actual speaker too =)

 

[Bamalama]

Oh, I have all that stuff -- a calibrated mic, a preamp, an ac vtvm, a sine wave generator, a pink noise generator with a sweepable bandpass filter.

But I didn't know that you could extract the mysterious cabinet-tuning numbers from all that. Please do tell me more....

B

 

[OllBoll]

Oh, I have all that stuff -- a calibrated mic, a preamp, an ac vtvm, a sine wave generator, a pink noise generator with a sweepable bandpass filter.

But I didn't know that you could extract the mysterious cabinet-tuning numbers from all that. Please do tell me more....

B

Hmm, now that I think about it you might be right as VAS, mms and such isn't trivial to extract from just those measurements unless you have calibrated everything with specific volumes and such.

If I were you I would just use some digital DSP before the DAC, build whatever box is convenient and then make the response into what you want =) DSP is too cheap nowadays not to use 😀

 

[ScottG]

But I didn't know that you could extract the mysterious cabinet-tuning numbers from all that. Please do tell me more....

B

http://www.artalabs.hr/download/LIMP-user-manual.pdf

ARTA Download

or perhaps:

Thiele Small Parameters

REW - Room EQ Wizard Room Acoustics Software



Other full design packages like Soundeasy and LSPcad also have this..



Additionally there are stand-alone products (with export features):

Dayton Audio DATS Dayton Audio Test System | 390-806

http://www.youtube.com/watch?feature=player_embedded&v=dARRX-tZpg4

woofertester.com

 

[Bamalama]

I might not follow those paths because they're too complicated and I'm too old and too tired, but maybe later. Thanks a bunch.

 

[ScottG]

LoudSpeaker Design, Testing and Engineering Consultants

Though not listed, I'm sure redrock will perform this service.. for a hefty fee.

 

[Lojzek]

But I didn't know that you could extract the mysterious cabinet-
tuning numbers from all that. Please do tell me more....

B

Audio sine wave generator, frequency counter, resistor 1000 ohm
(1W or more), 10 ohm precision resistor(1%) for calibration and
AC voltmeter. If you have all of this, we can continue.

 

[giralfino]

The simplest way: AudioBlog: A simple loudspeaker measurement jig for ARTA
You need an audio card with line levels, I use a low cost Behringer USB external device.
Ralf