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Hi everyone. I have a JC2 pre that I am having a problem with and I am looking for some help.
The pre was sent to The Upgrade Co. before I got it and I am the second owner.
When using the unbalanced inputs from my Cd player, everything sounds great. But I decided to try the balanced inputs and the sound stage shifts very far to the left side. I have tried 3 sets of balanced cables and all are the same. You can use the balance control to offset the shift but that doesn't seem natural to have to move it that far to correct it.
I am wanting to sell it but I don't want to sell anything that isn't working as I think that it should be.
I guess that if you only use the unbalanced ins all would be ok, but I would like to know where to start to try to fix the problem.
Any and all help would be appreciated.
Follow Ups:
"The pre was sent to The Upgrade Co. before I got it and I am the second owner. "
So, this isn't a JC or Parasound problem. This is an "The Upgrade Co." problem. You need to talk with them.
:)
-one phase of the low channel is missing. That would cause it to be 6 db lower than the other channel.
Is there any way to check/rectify this? I am not very savvy with technical jargon.
There are few if any reputable people in this area that I can take it to.
If the low volume channel is putting out a single-ended signal instead of balanced, it will be 6db below (much less volume) the good, balanced channel.
An easy, non-technical way to check: connect the low volume balanced channel output to a balanced input, and the other channel from the single-ended output to a single-ended input. If they play at the same volume level, then you have found what the problem is: the "balanced" signal is playing single-ended. Detecting where the problem is will be a bit more difficult.
You will need to swap balanced/single-ended connections for both inputs and outputs and use logic to determine which unit is at fault. I bet it's the modded component, and I bet the fix is easy for any technician.
Peace,
Tom E
berate is 8 and benign is 9
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Will Do!!
Try switching cable connections at the JC2 CD input. If the low volume channel switches channels, the problem is not in the JC2 preamp. If this is the case, the problem is either in the cables or the CD player. Without changing the reversed connections at the JC2 CD input, reverse the cable connections at the CD player output. If the low-volume channel switches back, then the problem is in the CD player. If not, the problem is in the cables.
Good luck,
John Elison
Thanks, I will try that.
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