New KT150 tubes?

Call me a rebel CJ told me flat out NO, but I just replaced the kt120's in my CJ premiere 12's with kt150's,60 hours in no issues ,been monitoring the transformers to see if they get hot ,no issues.the sonic difference is astounding in my system.I have had these amps for18 years,and have run 3 brands of 6550's 3 brands of kt88's,for almost 3 years kt120's.I switched to kt120's beccause of better bass and better dynamics,but I always felt they brought a little touch of electronic edge,I didn't know if that was coming from somewhere else in the chain.Back to the 150's,the sound is so dramatically better,I will never go back unless my amps blow up or I do.Dynamics like nothing I have ever heard,no grain or edge,best bass ,best and deepest soundstage ever and most musical

Joeinid just want you to know that I'm having no issues at all.yesterday I had a lot of my audio friends and audio business contacts over to here the magic thats going on in my system.The amps were running for 5 hours,and pushed them to their limits a lot off that time,again no problems at all.everyone who was there had the same comments ,ie,best dynamics I ever heard ,totally grain free,the instruments,sound so full and rich,imaging and stage depth huge.I can honestly say going from kt120's to kt150's is the single biggest improvement i ever made in my system.ill try keep you up to speed thanks David

Wow! your art amps are impressive,that's a good way to go ,to try it on the smaller amp first.I usually see Bill and Lew at ces ,2 years ago they were raving about how much they were liking the kt120's,last year they were not officially at the show as vendors ,but I ran into Bill ,Lew ,and Jeff their engineer in the hallways at the show .I asked about the kt150 and Bill said he had just acquired some but hadn't had a chance to test them yet .Jeff was concerned because of the higher filament voltage and that my amps transformers were not optimized for that tube,Bill didn't seem to be worried that the amp couldn't handle it ,more that,some of their customers still like to use 6550's and thats what the amps were designed around.Anyways I have always been a huge fan of there products and enjoy my amps and my ct5 pre amp,maybe someday art's.thanksagain