Yamaha P-2500 Amplifier Logo
Posted on Apr 03, 2009
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No stereo signal out from yamaha p 2500 s

I recently bought yamaha p 2500 s PA and am not recieving stereo .
the 1 jack out from my computer is a stereo jack , but the two input jacks from the same lead are not stereo tips. those two jacks go into an A channel and a B channel. The PA has a stereo setting so i am assuming the two input jacks were left and right , right ??
Would the two input jacks have to be stereo tips ?
I modified the lead replacing the input jack that had no signal with a stereo tip but still have no signal.
Does the jack with the signal have to be a stereo jack for the other to receive a signal ?

Thanks
Spence...............Melbourne

1 Answer

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  • Master 8,546 Answers
  • Posted on Apr 03, 2009
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Joined: Apr 02, 2009
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It's unclear what type of connectors are on the end of the cables(s) coming from your computer.

This amp only works with mono 1/4" TRS and XLR connectors, not standard RCA connectors.

Did you try the Right one in the Left Channel to see if the Left Channel worked?

Refer to the following manual and read up on the connectors (page 7) and the use of the Stereo/Parallel/Bridge Switch (page 8). When it is NOT in Stereo Mode the unit only uses the Right Channel controls and input.

http://img3.musiciansfriend.com/dbase/pdf/man/m_480824.pdf

STEREO/PARALLEL/BRIDGE switch
Use this switch to select the operating mode.
• STEREO mode
Channels A and B operate independently (as with a conventional
stereo amplifier). The Channel A input goes to the Channel
A output jacks, and the Channel B input goes to the
Channel B output jacks.
• PARALLEL mode
The Channel A input signal is output through both the Channel
A and Channel B output jacks. The Channel B input jacks do
not function. Channel A and B volumes can be independently
adjusted.
• BRIDGE mode
The Channel A input signal is output from the BRIDGE output
jacks. To adjust the volume, you must use the Channel A volume
control knob.

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