New STAX owner -- help please?

Dec 26, 2007 at 5:34 AM Thread Starter Post #1 of 8

pdennis

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Hey there STAX folks,

I'm an excited new owner of an SRX MK 3 in great condition, and an SRD-7 adaptor. HOWEVER, I'm not sure how to hook up the adaptor. On the back it says, "Red R+, Black R-, White L+, Green L-". This would be more useful if there were actually any red, white or green wires! Instead, I have two sets (presumably L/R) of three wires: one set with two blacks twisted together, plus a gray, and one set with two grays twisted together, plus a yellow. Who can help me unravel this mystery?

Also, I'm concerned that the adaptor says 100v on the back. Is it not safe to use this from a standard US outlet? I've heard that's true of amplifiers, but I'm not sure about this adaptor.

Thanks for your help everyone -- I really want to listen to my STAX!
 
Dec 26, 2007 at 5:48 AM Post #2 of 8
My impression of the SRD-7, from the schematic, is that it shouldn't matter one bit whether you plug it into 100v or 120v - the bias voltage is still regulated by the zeners, and the capacitors used are still within tolerance.

As for the odd wiring - dunno. Someone monkeyed with your SRD-7. Perhaps if you take off the casing and post some pics of the internals, we can deduce what goes where.
 
Dec 26, 2007 at 6:37 AM Post #3 of 8
Thanks for the quick response!

Well it looks like the double gray wires go directly to part of a circuit board marked L, while the double blacks go to part of the board marked R. Mystery half solved... now I just need to know which are positive and which are negative. The single wires for each set attach to the speaker/headphone switch. In these pictures you'll see all 6 wires shrink-wrapped together just to the left of the circuit board. The double wires going to the board, and the single yellow and single gray going to the switch. Which do you think are neg?

 
Dec 26, 2007 at 9:47 PM Post #5 of 8
I am nowhere near any of my SRD-7's, or else I could have taken a look into how its wired up. Some higher resolution pictures might help though.
 
Dec 26, 2007 at 10:01 PM Post #6 of 8
My guess is that the + wires are the ones hooked to the rotary switch.

Phase here is arbitrary anyway, since neither side of the signal is coupled to ground.
 
Dec 27, 2007 at 5:05 AM Post #8 of 8
Hey Eric, stop solving everybody's weird problems so fast! I hardly ever get the chance to scoop you these days. You've got to be fast on the draw to beat the man from Orem.
 

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