Having guarantee issues with KR Audio?

Regarding 300b compatibility with Frankenstein - at least Mesh plate 300B from Sophia Electric does not work. I have purchased them after KR failure and listen to no more then one hour. Strong distortion so I was afraid of failure. Confirmed by Sophia Electric that tubes are not suitable in my amplifier. I sold tubes and they work very well in typical 300b amp.

I also purchased Emission Labs 320B-XLS - no problems and borrowed Full Music mesh for a few hour. Owner of Full Music noticed that anode shines too much and was affraid of failure.

Regarding the sound of Frenkeinstein - maybe I try another 300b - but at the moment I think this amp is for 300b enthusiast, not for me. Experienced 300b audiophiles told me, that limitations I hear are "generic" 300b feature and every 300b SET they heard more or less suffers of slow and "exaggerated" bas not managed to keep the rhythm - and some high frequencies roll-offs. Speaker compatibility is not an issue as I own Coincident Total Victory 3 (great speakers, I like them very much)

"generic" 300b feature and every 300b SET they heard more or less suffers of slow and "exaggerated" bas not managed to keep the rhythm - and some high frequencies roll-offs.

Sounds like any poorly designed tube amp to me, certainly not a characteristic of a properly executed 300B amp, nor the tube itself !

If you want to try what I believe to the best current production 300B tube currently available by a long mile (and I have tried most in my SOTA silver foil output transformers amp)...Check out the EAT 300B, a truly remarkable sounding and super reliable tube IMHE...

I purchased a quantity of matched pairs and have a NIB pair listed in the AudioAsylum classifieds at waaay below retail price.

I had very poor experiences with KR. I had an older KR Enterprise amp that kept burning through 842 VHD tubes (I think that was the name). The tubes died a number of times and I had to replace with no recourse from KR. The amps sound nice, but it's clear that KR wants nothing to do with customers who have issues with their tubes.

I believe their new amps are better designed than the older KR Enterprise stuff.

Sounds like a shady bunch . Thanks for the warning .

Shady bunch is being kind. Stay away and you will be the wiser for it.