The Headcase Stax thread

[spritzer]

Since I just got these, might be time to talk about possibly the rarest stuff Stax ever made.    Let me introduce the SRM-Monitor Mk2 and the SR-Lambda Pro New:

I've only seen a couple of these for sale over the years so very rare indeed.  The headphones are basically the modern version of the Lambda Pro's but not the Spirit/Pro Classic, made later than that.  

The SRM-Monitor has been called the Mk2 but the changes are mostly to the chassis.  Inside there is still a SRM-1 Mk2 and the ED-1 but with different parts.  They are all Pro bias only and notice the extra output on the back.  The volume knob is also similar to the SRM-T1S/W knob and not the SRM-1 Mk2 unit found of the original Monitors.  

I have no idea when these were made but I've heard late 90's and for special customers which wanted to replace their older Lambda Pro sets and SRM-Monitors.  With these here the Lambda collection is almost complete...  

[naiy8oaY]

Quote

With these here the Lambda collection is almost complete...  

So what is still missing?

[spritzer]

I'd rather not say but I'm missing 3-4 units at this point unless something super, super rare pops up.  

[Omega_ELS]

Does anyone have any ideas what kind of damping Stax used in the Sigma?
It looks like some kind of material like cotton wool
but I'm not sure..

I'm thinking of replacing it, but what... it seems like it's not that simple... it looks like mineral wool... and it looks like they manually adjusted the frequency response of each Sigma using this wool... and i can't just take it out and put something else in...