[amirmankovski]

Might be a silly question but is there an inherent difference between the two versions of MU524?

Just curious as to why there is a mono or stereo left version and a stereo right version and what is the difference between them.

[JPK]

The left and right compressors are identical except for the tube heater supply where we use voltage regulators working at 2 far away frequencies in order to avoid the risk of noise caused by low frequency beat between these frequencies.