VAC Preamp: Is my Phono stage failing?

One could guess a grounding issue but hard to imagine how this would work with a warm-up. It might be worth playing with different grounding options to see if that is the problem.

If the VAC phono fits your needs and you love it, then the repair costs will likely be a fraction of what it would take to get a closely performing outboard unit . I bet you the cost of repair would not even be what you would want to spend on a good power cord for an outboard phono stage. Call Kevin or Brent and they will tell you if there is something obvious to check or do and the range of how much you are looking at in terms of repair.

The advantage of an outboard phono is that most have a great deal of flexibility in terms of gain and other settings that allow you to use many different cartridges. VAC might box you in a little with the phono but I am guessing it is extremely good for the carts that can be used with it.

Alonski, FWIW, I have a dedicated line and a power conditioner and have found that the sound is improved (opened up) on my VAC integrated amp if I go straight into the wall with the amp. I have seen a number of threads that back up the assertion that amplification performance is better going straight to the wall. I know it is a bit of a risk but I take precaution to unplug during storms or if I am away for extended periods. Also, as a last resort, I guess my homeowners insurance will cover me if there is a sudden and accidental surge that wipes out my VAC.

Looks like I've got some research to do on then Purepower. That is interesting to know.

In talking to my agent about this potential issue, I ended up increasing the overall coverage but was told that, at least for my policy, there was not a limit on specific types of items (i have some other toys too). It is a good question for sure.