Hey Brownsfan...yes, I encountered the same issue with the mute switch, but only if I was running balanced (I think...been awhile since I talked to IB). I elected to do nothing and not use the mute at the time. I should talk to him and find out if he has any ideas.
With the Audion's gain turned down so that I'm using much of the gain of CSL (i.e. vol knobs 1 - 3 clicks from max), the hum/buzz is completely inaudible from the listening seat. With the higher, non-adjustable gain of the Valvets, I have no option to reduce the noise/hum.
When I ran all balanced systems, I rarely was aware of any noise/hum in my system. The frustrating thing is right now, even running all balanced from Luxman DAC to CSL to Valvets, I get this hum/buzz. If I run balanced or SE from Luxman to Valvets directly (bypassing the CSL), no noise at all, yet the Jensen trouble-shooting guide suggests it is due "inductively coupled noise".
With the Audion's gain turned down so that I'm using much of the gain of CSL (i.e. vol knobs 1 - 3 clicks from max), the hum/buzz is completely inaudible from the listening seat. With the higher, non-adjustable gain of the Valvets, I have no option to reduce the noise/hum.
When I ran all balanced systems, I rarely was aware of any noise/hum in my system. The frustrating thing is right now, even running all balanced from Luxman DAC to CSL to Valvets, I get this hum/buzz. If I run balanced or SE from Luxman to Valvets directly (bypassing the CSL), no noise at all, yet the Jensen trouble-shooting guide suggests it is due "inductively coupled noise".