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The Entry Level Stax Thread - Page 87

post #1291 of 1297
Quote:
Originally Posted by xaval View Post
 

Check the high end forum. Spritzer and a couple more did mod quite a few energizers - I have no idea if those users are still members or posting, though. Loads of knowledge have left theses boards last couple of years. 

 

Search and ye shell find... it's only a couple of 1000 post threads long :)

I know of the mod to make a pro plug.  I just do not recall seeing any mods to the sb units to up their quality.  I'll look through the high end forum.

post #1292 of 1297
Quote:
Originally Posted by Keithpgdrb View Post
 

I just do not recall seeing any mods to the sb units to up their quality.

In case you've missed my post, you can make a non-sb unit out of an sb but even if you don't want that, I think much of the mods (if there's any) would also apply to sb units as well, there's not much of a difference.

post #1293 of 1297
Ok, so I could not resist and ordered the SR-307 which arrived today. I had a very quick listen during the lunch break and my first impression was that it sounds brighter compared to the SR-207. I run both headphones from the SRM-252S amp (amp upgrade is already part of next month's budget).

Now I was wondering is the SR-307 in general brighter than the SR-207 or is it just underamped?
post #1294 of 1297

In all of stax history, and I just went thru every single amp...

 

There was only one actual stax amplifier that had transformers.

It was called the SRD-X and it used automotive power opamps

driving transformers. It was portable in the sense that it would

run of a 12V battery, like that in a car. It was just awful.

 

The rest of the stax transformer boxes are just that. transformers

and a bias circuit in a box. No actual amplifier.

post #1295 of 1297
Quote:
Originally Posted by kevin gilmore View Post
 

In all of stax history, and I just went thru every single amp...

 

There was only one actual stax amplifier that had transformers.

It was called the SRD-X and it used automotive power opamps

driving transformers. It was portable in the sense that it would

run of a 12V battery, like that in a car. It was just awful.

 

The rest of the stax transformer boxes are just that. transformers

and a bias circuit in a box. No actual amplifier.



Not just a 12V battery, but EIGHT C-batteries in serial (1.5V * 8 = 12V).... I had one and it was a fantastic way to blow through a car battery's worth of juice in about half a day.


Edited by Tus-Chan - 9/3/14 at 6:03pm
post #1296 of 1297
Quote:

Originally Posted by kevin gilmore View Post

 

It was portable in the sense that it would

run of a 12V battery, like that in a car. It was just awful.

The rest of the stax transformer boxes are just that. transformers

and a bias circuit in a box. No actual amplifier.

 

That't the sort of thing I did with the DDX320, running it from big batteries (2x12V) and with the SRD7SB, optical from a laptop. It's a nice setup that runs for hours although it's not that portable (I can put it in my backpack though).

post #1297 of 1297
Does anyone know how to unscrew the volume knob on the SRM-252S? I'm curious to see what the internals look like. I didn't know this amp is a class A amp as well; it doesn't get nearly as hot as I thought a typical class A amp does.

Oh never mind, I found my answer:
http://www.head-fi.org/t/223263/the-stax-thread-new/13695#post_6766438
Edited by miceblue - 9/10/14 at 12:36am
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