Good small/single outlet power conditioner for preamp.

@erik_squires nope. Dang it, I had some hope with that one… 

Anyone know which power conditioner is considered the competitor to the Puritan 156?? I guess I could always try that one… but I’d have to commit to this preamp first and then pray that it is compatible with the new conditioner. 

@erik_squires   Hey, what about Equitech 2Q. Ok it's more than he wants- but Furman is also sizeable  :)

@ptss Furman makes single strips like the PST-8d that include the filter/surge protection features which is much less expensive and much smaller than the Elite versions. 

The must-have features from Furman are SMP and LiFT (Series protection and linear filtering).  Keep an eye out because they make a lot of products that don't include those.

If you plug the new pre-amp into your power amp with no source devices attached (while connected to the PSM156) - any noise from just the pre-amp and power amp?

If so, try a different set of interconnects? Are you using RCA or XLR cables to connect the Pre to the Power? Does the Pre-amp have a three prong power cord or two prong? If all is silent, then add one device at a time and see if one device triggers the hum. I have never seen a Puritan cause noise.

@jriggy  I had the same issue when introducing one of my valve FM tuners to my system. A different tuner works perfectly.

I trialled the 156 and it didn't work in my system, altering piano sound too greatly. I have since enjoyed a UK built "AC-2K Balanced Mains Supply". This reduces noice floor and enhances clarity and impact in my system while not emasculating natural sound of piano or other instruments. Good luck.