[Nemeske88]

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

 

[kouga001]

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

 

[kouga001]

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

 

[Nemeske88]

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

 

[Nemeske88]

 

 

[Nemeske88]

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 

 

[Nemeske88]

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

 

[spritzer]

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., 

 

[Nemeske88]

Thank you for your attention.

 

[Nemeske88]

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!

 

[spritzer]

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

 

[Nemeske88]

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
 

 

[Nemeske88]

 
 

 

[briskly]

  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?

 

[spritzer]

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