Hi Tang,
from 1980 till 1990 i had ARC SP 8 and SP 10 and Sp 11and D90 B and then D 250,Counterpoint,then i tried CJ and then i bought Jadis Ja 200 and JA 500 with pre and phono JAdis 200
with MAgneplanar timpani Iva and then Soundlab A1 with sub B1 and then i change with Mark Levinson ML 6B,network LNC2 mono and 4 pair of N 20 bridge for Soundlab,
so i already change tube with Transistor founded ML more neutral,natural and transparent that ARC,CJ and Jadis.
Then in 1990 i knew and became friend with Be Yamamura that show us the triode amp with 845,211,300B that i and my friends saw only in japan magazine,and we really discover a new world and new sound really much better of all we listen and was imported in Italy,AudioNote,Audiotekne,Shindo,Mactone,ecc,arrive in Italy some years later.
So Yamamura came to live in Italy and stayed some months also in my home,i was not married,and built for me a preamp and amp 8 stack with the weight of total 280 kg with super permalloy trans and amp with 845 and a turntable air bearing
All we were shocked for this quality.
Then Yamamura had health problems and go back first in USA and then in Japan and amp broken 3 times and in Italy adjust bad,ecc,ecc and i sold everything and i started to buy Audiotekne and Kondo
and in meantime i tried Mactone M8V otl mono,Shindo Petrus with Shinonia and 300B Limited,Dyssanayake,FAL,Sakuma,ecc,ecc
I had also a beautiful collection,and beautiful sound and i had Vintage MC 30,MC 75,Quad II,Leak TL 12 plus,Redford sta 15.
So i listen from 1990 till 2 years ago with tube
When i tried CH pre line L1 and mono amp A1 i found them very good,similar midrange than Kondo but better bass and high,the sound was more clean,listening Kondo was very good but seems more dirty than CH
Then i tried P1 vs Kondo GE 1 and i prefer P1
Also my friend that wanted to buy my GE1,he had Viva top preamp,italian tube company,tried in his system GE1 and P1 and also him with Viva pre and Viva Aurora mono amp prefer in his system P1
Then i bought P1 and M1 mono