Hello All. I am looking for input from those who understand such things....
I have a pair of Audeze LCD3's that have both single-ended and balanced cables. I understand that the single-ended cables take the positive signals (+) from each channel and return the signals to a common ground. I understand that the balanced cables take the positive (+) from each channel and return each channel to the amps negatives (-) for each channel. At one point I was thinking of using a pair of 300b monoblocks to power my LCD3's, and Audeze told me that I could simply do this by hooking their 4-pin balanced connector to the R+, R-, L+ and L- terminals of my amplifiers (with proper pin matching).
At this point in time, I having a Korneff 45 SET amplifier built for my LCD3's. The planar magnetic headphones can handle the 2-3 watts put out by the 45 SET amplifier. The amp builder is planning on providing both speaker terminals and a single-ended headphone jack. I'm wondering if I should ask for both single-ended and balanced jacks, or perhaps just a balanced jack. Or, if he only provides a single-ended jack for headphones, if I can attach the LCD3's to the speaker terminals as discussed above.
I understand that the amp design does not make a true balance signal, using either: a) two amplifier circuits for each channel to process the normal and inverted signal, or b) a balancing transformer to invert the signal and create a normal and inverted output per channel. Asking for either of those options would go beyond the basic amplifier design. So, if neither of those options are used, my questions are:
1) is there any value to including a 4-pin jack for the LCD3 balanced cable as described above?
2) Is it possible to have a 4-pin XLR jack and a 1/4" single-ended jack on the same amp? Are there issues with the fact that the single ended jack has a common ground?
Thanks in advance for your advice. Peter
PS - wiring diagram for LCD3 balance cable below: