I suspect that your preamp's volume pot would have malfunctioned on both the single-ended outs AND the XLR outs if it were to blame. I'm guessing at this point the fault lies inside the preamp's single-ended output stage. I've run my pair of SM-70 Pro's both single-ended and balanced (through installed Goldpoint attenuators) and there certainly was no noticeable difference in gain, of course. Hope this helps.
Replace volume pot
Hello,
My preamp has a Noble volume pot at 100K ohms.
I like the sound of the preamp in my system so I prefer to keep it. However, I'm having to run the preamp with volume control at almost max rotation to produce a moderate sound level. Also, I like my Monarchy amps and do not want to change these. A friend tracked down a Noble pot (same physical dimensions and pin configuration)at 50K ohms.
I'm hoping to replace the pot and not alter the sound characteristic/performance of the preamp.
Any concerns with performing this swap?
My preamp has a Noble volume pot at 100K ohms.
I like the sound of the preamp in my system so I prefer to keep it. However, I'm having to run the preamp with volume control at almost max rotation to produce a moderate sound level. Also, I like my Monarchy amps and do not want to change these. A friend tracked down a Noble pot (same physical dimensions and pin configuration)at 50K ohms.
I'm hoping to replace the pot and not alter the sound characteristic/performance of the preamp.
Any concerns with performing this swap?