Good small/single outlet power conditioner for preamp.

Anyone know what’s out there? 
I am demoing a very nice preamp but it, for currently an unknown reason, does not play well with my Puritan PSM156 conditioner. The pre exhibits noise/hum from the speakers with any source ICs plugged into it. 
But the preamp straight to the wall is hum free and all is fine. 
If I wanted to keep this pre, straight to the wall is not ideal. So I am preliminarily curious what nice small/single outlet power conditioners are out there for me to consider… 



@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.