Showing posts with label wallin jig preamp speaker testing ARTA LspCAD. Show all posts
Showing posts with label wallin jig preamp speaker testing ARTA LspCAD. Show all posts

Thursday, June 25, 2009

Speaker Measurement Test Equipment

Now that I have downloaded a couple of demo packages, I need to sort out the hardware.

Part of my choice for LspCAD and ARTA is that I can create some semi-inexpensive jigs, and actually use the 2 programs to measure speakers.

If it doesn't work, I don't loose a huge amount of cash. If it works, then I keep using the same equipment and software.

I would like to run the tests outdoors, in an empty field, so I don't have to worry about echo and room response, etc... Based on that hope, I plan on the following rig:

Dell Vostro 1510 Laptop, Vista 32bit, 4gb RAM, Dual-Core CPU (already own it)
Soundblaster X-Fi Expresscard (gotta buy)
JBL GTO Amp - I have a car stereo amp in my truck, powering 2 coaxials and a 10" woofer. I have easy access to the amp, so I can use it for testing.

There are a few items I will have to solder together also...

ARTA Jig - http://www.fesb.hr/~mateljan/arta/AppNotes/AP1_MeasuringBox-Rev4Eng.pdf - looks like $20 in parts to make a jig for measurements.

LspCAD Jig - http://www.ijdata.com/justMLS%20manual.pdf - another $20 to create a box with resistors to measure loudspeakers with LspCAD.

Wallin Preamp2 & Panasonic WM-61a Microphone - http://mysite.verizon.net/tammie_eric/audio/preamp2/preamp2.html
http://orca.st.usm.edu/~jmneal/preamp1.htm
I have 80% of the parts already for a Wallin Preamp, and I bought 3 of the circuit boards in 99/00 when they were being made (a buddy wanted a portable powered Mic for less than $50, this was it) back in the day. If this works out, I will get the mic calibrated - if not, not a huge loss.

Looks like the total outlay for the SB card will be $100, and the 2 jigs / PreAmp / Mic will be $85, so that is $185 just to test a hobby out... wonder if I should do it or not?