Ming DA MC 84C07 had a right/left channel disconnect problem that may actually be the "Earphone/Speaker" switch on the side of it.
Feb 15, 2012 at 11:22 AM Thread Starter Post #1 of 1

Linyanti

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I use lots of gaming and other headphones with this amp. They usually have 3.5 mm plugs so I use adapters. I also got different adapters with different impedances to change the sound.
 
My issue is that sometimes the headphone 3.5 mm plug had to be put in just perfectly or I would hear only the left or only the right channel. I thought that it was the different adapters. I would trust a certain adapter since it would seem to always give me both channels.
 
But recently, I found that toggling and jostling the switch on the right side of the amp (the "Earphone/Speaker") switch would also correct this problem.
 
Has anyone else experienced this issue regarding the 3.5 mm jack position and the right and left channel in the headphones?
 
(Using Mullard EL-84 and Amperex Bugle Boy 12AX7 Short Plate and really like the sound.)
 

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