Not sure for power conditioner my amp or not.

Smorenc,

What a beautiful amplifier! I have the same VTA ST-120 with KT120 tubes, but it is nowhere near as beautiful as yours.

My experience (and with the same amplifier as yours) is that it will definitely sound better plugged directly into the receptacle and bypass the power conditioner. I would also recommend (if you have not done so already), that you upgrade the power receptacles themselves.....that is worth another bump in sound quality. I can highly recommend 3 receptacles: Furutech GTX-D(G) gold plated, Furutech GTX-D(R) rhodium plated, or the Oyaide R1. All are around $200 give or take, and well worth the upgrade....or at least were in my system.

Thanks for nice comments. I had fun building it and the preamp. Yes, I have an upgraded outlet too. Thanks!

Hi All, 1 more advice question. I ordered the Zero Surge 2 outlet. Mainly because that one would fit behind the cabinet. I don't know which device to plug in the other outlet. I have one outlet for ST-120 tube amp. The next one I have 2 devices and I am not sure which one to use it for. I have a 13 channel Onkyo HT receiver and a VTA SP14 tube preamp. Any advice between those two on which one to use in the other outlet? Thanks again, Scott

Years ago, this was the big question for myself, as well.  When I asked the experts what to do, some said plug my amp directly into the wall socket, and some said plug it into a power conditioner.  So, I experimented.  I spent a considerable amount of time comparing the sound quality of my amps (some SS, and some tube) plugged directly into the wall socket, and then plugged into a power conditioner.  In the end, I found that my amps always sounded better plugged into a power conditioner.  But, ultimately, it all depended upon what conditioner I used.  This was critical when all was said and done.  Not all power conditioners are created equal.  Long story short, I found that the Audioquest Niagara line of conditioners (I opted for the Niagara 3000 ) were superb for amps (any amp).  My amp's sound quality plugged into the Audioquest Niagara 3000 was much improved, providing much cleaner, non-power restricted, power.  I'll always plug any amp I'll ever own now, and in the future into some type of power conditioning.                   

I feel my amp sounds better with the power conditioner as well as the picture on my television..