Another "kinda-newbie" head scratcher

@ericrhodes1 

Thanks for asking the question. I have a similar problem with my phono preamp. However, my sound is no heard through my speakers. It’s a high pitched sound coming from the preamp (McIntosh MP100) itself. I’ve been able to isolate the sound to the preamp. It’s a relatively new purchase that I bought with a new McIntosh MT 10 Turntable…

I’ve read the string here and will try some of the solutions suggested to you. The high pitched sound is barely noticeable but I do hear it, others don’t hear it at all. However, I have always had a keen sense of hearing that hasn’t waned much in my 72 years...The sound stops only when the unit is turned off.

@gjfalls Sorry to here that. What a bummer! Too late for an exchange? 

@ericrhodes1 

Thanks! Since I bought it new and ordered from one of the reputable audio websites I will return it for a replacement after trying some of the remedies afforded you don’t work, albeit being a slightly different problem or give up on using a phono preamp and try running the turntable through my system’s primary preamp, which is a McIntosh C2600.

@gjfalls MP 100 is sensitive to placement. I borrowed it from my buddy and had to move it about 3 feet away from my amplifier as it was affected by EMI and hummed. Make sure it’s at lest 3ft away from any network components as well. But the high pitch noise could indicate issues with the unit’s power supply or other internal components. Good luck. 

@audphile1 I got the long fiber run. Digital side is up and running. Sounding better than ever. I'll reinstall the Sutherland tomorrow and post my results then.