Anyone experienced the Luxman MQ-300 or/and The Air Tight ATM-300R?

h_bomb,
I can understand your preference for the 300b compared to the KT 88 amp you currently have. The KT 88 is a very good sounding tube if well implemented. However IMO a well implemented 300b is quite formidable and alluring 😊. I was a happy owner of a KT 88/6550 push pull amplifier. Once I got my 300b SET thers was no going back. That was 10 years ago. I believe that you will enjoy your Luxman SET amplifier for many years.
Charles

There’s no replacement for displacement they say. The MQ-300 has transformers that weigh a ton in comparison. It’s a wonderfully beefy 8wpc. I know from experience. I had no doubt it would work in his situation. 
I’m so happy he is experiencing that awesome amp. 
Enjoy it in great health!

I actually think they are 2 superb superbs amplifiers and I might keep both. The 300 though has a built I had never seen before though. It is really a statement product. 

Thank you for your update and confirming my suspicions that the MQ-300 is one of the best out there.

Yes, the build quality is quite out of this world. Pictures do not do it any justice.

Hi Essrand,
what is your system right now? I saw the posts about your amp quest but I do not know what you ended up choosing.