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RARE STAX SRM-X Pro? Anyone,any impressions?

post #1 of 16
Thread Starter 

Dear Forum! Has anyone got any experience with this "portable" amp of STAX? 

post #2 of 16

also curious, just seen one be sold out by eBay today: http://www.ebay.com/itm/STAX-SRD-X-Pro-Kopfhorerverstarker-/121017967761

post #3 of 16

oh my careless! didn't note the difference between SRD-X and SRM-X, forget it :-(

post #4 of 16
Thread Starter 

Yeah, almost the same type name but different technology (the SRM-X is transformerless)

post #5 of 16
Thread Starter 

1000

 

1000

post #6 of 16
Thread Starter 

Here are 2 photos, one showing it's internals that is (to my knowledge) identical to the latter model, the SRM-Xh, but with Normal bias + battery pack connection availability 

post #7 of 16
Thread Starter 

700  Here, we can see the SRM-X Pro with the Bps-600 battery-add-on (right corner)

post #8 of 16

It's identical to the SRM-´Xs and some of the earliest SRM-Xs amps but most of them use the far superior circuit found in the modern day amps.  Mosfets as the output are just a very, very bad idea., 

post #9 of 16
Thread Starter 

Thank you for your attention.

post #10 of 16
Thread Starter 

HELP!

 

Does anyone know what is the exact type of the potentiometer used on this model,(SRM-X Pro) or its specifications to be able to exchange it to a brand new?

 

 Many thanks!

post #11 of 16

The cheap Alps RK16 50K pot is probably what they used.  It certainly was in that style. 

post #12 of 16
Thread Starter 

Thanks! I have the amp but I cannot open it since Ive just atteched some new stick-on bumpers on the screws at the bottom:-)
 

post #13 of 16
Thread Starter 

 

 

post #14 of 16
Quote:
Originally Posted by spritzer View Post
 

It's identical to the SRM-´Xs and some of the earliest SRM-Xs amps but most of them use the far superior circuit found in the modern day amps.  Mosfets as the output are just a very, very bad idea., 

I don't quite understand this. You mean that early versions of the X Pro (and srm-xh) have a circuit similar to the SRD-X?

post #15 of 16

No, the SRM-X Pro and SRD-X Pro were completely different circuits.  The naming could have used some work though... :o

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