‘amazing… better than reissue WE300B’

– from Robin Waytt, owner of Robyatt Audio (www.robyattaudio.com)

“The new Shuguang Treasure Series 300B-Z tubes arrived yesterday. These Black bottle carbon coated tubes are kind of unique in appearance, and construction, so I thought I would try them!

‘I discover a great (maybe the greatest) 300B tube’

– from  customer Lucian R. in California:

“I just wanted to let you know that yesterday I exchanged all the tubes in my amplifier for ones I received from you.

I am impressed with the sound and if the tubes sound like this immediately from the box I can imagine how they will sound after a couple hundred of hours….

TJ Full Music 300B mesh plate vs. Treasure 300B-Z

from customer Doron O by email:

“Hello, Tubes arrived and are playing along. I do not think they are going back to you anytime soon…:-) Very good from the get go. Compared to the existing TJ 300B/n Mesh Plates the SG 300B-z have massive bass, they sound smoother, more relaxed, mid range is fuller (more lush) yet clean – more meat on the bones so to speak. Very seductive and un-fatiguing tubes, exactly like the experience Ian presented in the forum.”