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Old 27th October 2005, 05:44 PM   #1
diyAudio Member
 
Join Date: Oct 2005
Question Need hEEEEEEEElp!!!! wiring problem!!!!

Hello and thanks to all audio fanatics...

I need help connecting and wiring this gear:

Mesa Boogie Triaxis preamp 6'3 jack balanced output ---> Klark Teknik Dn-405 parametric equaliser XLR balanced input (pin 2 hot jumper ON) ; and

DN-405 XLR UNBALANCED output (pin 2 hot jumper ON) ---> TC Electronics G-Force UNBALANCED 6'3 jack input.

I think the correct wiring should be:

TRIAXIS BALANCED JACK OUTPUT: TIP (+), RING (-), SLEEVE (G)

DN-405 BALANCED XLR INPUT: PIN 1 (G), PIN2 (+), PIN 3 (-)

DN-405 UNBALANCED XLR OUTPUT: PIN1 (G), PIN 2 (+), PIN 3 (DISCONNECTED)

G-FORCE UNBALANCED JACK IN: TIP (+), RING (G)

But I get -6 dB and a high frequency loss at the output of the DN-405 in comparison to the Triaxis output!!! Also, it sounds perfect if I turn off the DN-405. (???)
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Old 30th October 2005, 03:43 PM   #2
kepa1 is offline kepa1  France
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Location: Paris
Hi guitaratiug,

I'm not sure I totally understood your setting but whenever you connect a balanced output with unbalanced adaptors, you lose 6db.

That would explain your loss, wouldn't it?
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Old 30th October 2005, 10:10 PM   #3
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Thank you for your reply, but

The signal path goes from an UNBALANCED XLR (where pin 1 and 3 are connected in the output) to an unbalanced input jack. There should be no signal loss at all in this case!

[My conclusion is that it may be occuring an impedance problem...]
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