I recently installed the VRM module in my TC15, as per the instructions, full power supply regulation. I am very happy with the results; makes the amp much more versatile for home use. I do have one observation, and want to check if this is normal.
I have noticed that the 12AX7 channel responds more dramatically to the power reduction than the EF86 channel, in terms of drop in volume and faster onset of distortion. I assume this is because the EF86 channel only has a single preamp gain stage being down-regulated compared to the four 12AX7 stages being down-regulated. Has anyone else observed this?
thanks Mark
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