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Stax Sigma Low Bais and Stax Sigma Pros

Jul 27, 2008 at 12:31 AM Post #331 of 482
Quote:

Originally Posted by John Buchanan /img/forum/go_quote.gif
I presume "wired out of phase" means that they were both wired with the same inverted absolute phase, which considering that they are firing from the opposite side of the transducer (compared with the Lambda), the two inversions should cancel. I'm kinda hoping that they didn't wire them out of phase with each other!!


That's exactly what I meant.
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Stax did play with this a bit as some of the SR-# line was wired with inverted phase, presumably to bounce sounds off the baffle.
 
Jul 27, 2008 at 12:43 AM Post #332 of 482
Quote:

Originally Posted by spritzer /img/forum/go_quote.gif
That's exactly what I meant.
redface.gif
Stax did play with this a bit as some of the SR-# line was wired with inverted phase, presumably to bounce sounds off the baffle.


I need to remember this. Very interesting information. I never thought about phase at all.
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Jul 27, 2008 at 7:58 AM Post #335 of 482
Keep the posts coming!
I am really interested in reading about your Sigma (Pro, 404, ..) impressions. Especially since I have never heard one myself...
 
Jul 28, 2008 at 2:22 AM Post #337 of 482
So we have two phase inversions - the driver back to front (compared with a lambda) and the phase inversion as the sound is reflected off the damping material. Why did they feel the need to invert the wiring phase as well?
 
Jul 28, 2008 at 2:48 PM Post #338 of 482
Quote:

Originally Posted by John Buchanan /img/forum/go_quote.gif
So we have two phase inversions - the driver back to front (compared with a lambda) and the phase inversion as the sound is reflected off the damping material. Why did they feel the need to invert the wiring phase as well?


The drivers are indeed front to back compared to a Lambda but that doesn't matter as they are dipoles and the sides are identical. That's why Stax wired them just like a Lambda which in this case inverts the phase.
 
Jul 29, 2008 at 1:33 PM Post #340 of 482
To further expand on the SR-Sigma drivers, they are indeed very simple beasts. I should know as I've had the unfortunate pleasure of restoring one which split open. The diaphragm is mounted to two brass rings and the stators (perforated copper) are encased in a plastic mold which it then glued to the brass rings on either side. Add spacers for the dust covers and the metal protection grill and the drivers are complete.
 
Jul 31, 2008 at 3:31 PM Post #343 of 482
Hi everyone. It's been a while. Does anyone know anything about the stax SRM X Pro Portable amp/driver? How does it compare to the SRD X Pro Amp/Driver? Any information will be greatly appreciated?
Scottsmrnyc
 
Jul 31, 2008 at 9:07 PM Post #344 of 482
Quote:

Originally Posted by Scottsmrnyc /img/forum/go_quote.gif
Hi everyone. It's been a while. Does anyone know anything about the stax SRM X Pro Portable amp/driver? How does it compare to the SRD X Pro Amp/Driver? Any information will be greatly appreciated?
Scottsmrnyc


The SRM-X was the precursor to the SRM-Xh which I had. Not a very good amp and will never push the Sigma's.
 
Aug 5, 2008 at 2:18 AM Post #345 of 482
Thanks for responding. Scottsmrnyc
 
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