The Stax thread (New)

[Beefy]

Quote:

There is one in every crowd. Where is your KGSSHV?
 
Nuff said.

 
Yeah, you have absolutely no right to get cocky. You got LUCKY.

 

[verwandlung]

Quote:

 
 
Your head opened up.

 
Then I am looking forward for it to open up again! Thanks.

 

[cjfrbw]

It seems I am getting a fairly severe channel imbalance in my 507 headphones.  The R channel is about 4-6 db down in the right, and can get grainy after a while.  It is not the SD 7 pro mod transformer, the transformer works fine with other Stax headphone,
 
Should I just order a replacement driver, or is it likely it is the power cord or solder connections?  No unusual trauma that I can recall to cord or headphone.  What order of diagnostics? Where do I get the star screw driver to remove the headband screws?

 

[jaycalgary]

Originally Posted by HDMan 
 
There is one in every crowd. Where is your KGSSHV?
 
Nuff said.
 
I am taking my time and getting everything together and a little at a time. Still liking the project though. Congrats on getting it done! Would have guessed you would have been done closer to the 4th of July though.

 

[HDMan]

Quote:

 
Yeah, you have absolutely no right to get cocky. You got LUCKY.

 
Let's see if it was luck next time round, you may be right, but then again you may be wrong. I still have 2 off board PCB's and 2 PSU boards, if your right then I guess I will waste my time, but I am confident next time round will work also.
 
I don't believe luck had anything to do with it, I do believe however that without Kevin's help I would not have been able to finish it off so soon.

 

[spritzer]

Quote:

It seems I am getting a fairly severe channel imbalance in my 507 headphones.  The R channel is about 4-6 db down in the right, and can get grainy after a while.  It is not the SD 7 pro mod transformer, the transformer works fine with other Stax headphone,
 
Should I just order a replacement driver, or is it likely it is the power cord or solder connections?  No unusual trauma that I can recall to cord or headphone.  What order of diagnostics? Where do I get the star screw driver to remove the headband screws?

 
Let them play for a while and see if it doesn't get better on its own. 

 

[Tilpo]

I wonder.

How hard it is to mod an SRD-7 with normal bias to have pro bias?
I mean as in: Are the parts required for the job rare and/or expensive?

It could save me some serious bucks and time, since it's hard to find a good deal on cheap amps with pro-bias, and the rare SRD-7's with pro bias I found are over priced.

 

[kevin gilmore]

The schematics are around somewhere, its easy to upgrade.
Or buy spritzers board if he has any left that does the same thing.

 

[milosz]

Has anyone here ever gotten an electric shock from a pair of Stax headphones?  I'm just wondering if it ever happens / is even possible.
 
How much current is typically available from the bias supply?

 

[justin w.]

there's supposed to be a 5 meg resistor in series with the bias supply before the headphones, which would limit current to 0.1mA

 

[ardilla]

.
Any thoughts of the differencies between SRM-006t and the SRM-007tII for the 007 mkII ?

 

[cjfrbw]

Quote:

 
Let them play for a while and see if it doesn't get better on its own. 

They do seem to be getting better over about a week or so.  I think I may have gotten moisture somehow on the right earpiece and it takes a long time to dry out.
 
I will wait and see over a couple of weeks, thank you.

 

[SteveA]

I was shocked by a pair of Stax SR-40 electrets years back.  They had to go back to Japan for repair.  It wasn't painful, just irritating!  I have never been shocked by my SR-407s.

 

[Tilpo]

The schematics are around somewhere, its easy to upgrade.
Or buy spritzers board if he has any left that does the same thing.

Would you be so kind as to point me to the schematics?

I found schematics of the of the SRD-7 MKII and pro, but not the older version.
Also, where would you be able to buy receptacles/jack for the pro plug?

 

[Michgelsen]

Quote:

Has anyone here ever gotten an electric shock from a pair of Stax headphones?  I'm just wondering if it ever happens / is even possible.
 
How much current is typically available from the bias supply?

 
I touched my ghetto Stax/HE60 adapter once while playing, which had bare contacts. It was a very, very slight tingling sensation. I held on for a while before I realized the tingling was because of me touching something electrified. No pain or other things you would normally associate with an electric shock. Music kept on playing fine as well by the way.