Cayin A-300b vs Muzishare x9

@slowestrider i am new to hifi i only experiment 18 months in this hobby. But what you said sounds correct. Kt88 push pull to my taste won against Cambridge audio azure 851a. So i sold azure. Now between kt88 push pull vs 300b set i kind of feel like  the same comparison as azure but not as much. So i feel lucky to have both x7 and  X9. 

@cb3489,
After only 18 months in High End audio you became aware of and then acquired a SET amplifier, I’m impressed. It took me much longer to reach that stage but glad I did.

I had a Symphonic Line which is a very good German made solid state amplifier. Moved on to a push pull 40 watt el34 tube amplifier (Which was more musically fulfilling). Next step was a custom 100 watt push pull KT 88/6550 tube mono blocks (Best I’d ever owned up to that point).

Decided to try an 8 watt 300b SET mono blocks  in 2009 and immediately knew this was what I’d been seeking . 12 years later I’m as happy and satisfied as I was on day 1.
Most musically and emotionally engaging amplifier I have ever owned. It brings the music alive. This journey far exceeded 18 months 😊.
Charles

@cb3489. Is your X9 came with Chinese or English manual? My came with Chinese manual. Do you read Chinese?

Are 300B and 274B fit not tightly compares to others? 6SL7 tubes very tight fitting and EL34 and 6550B snuggly fitted on the R8 but these large tub easily moved with slight  finger touching.

NFB 1 means -3db feedback and 2 means no negative feedback?

Thanks in advance.

@slowestrider congratulations. My came with Chinese as well :) nfb i liked up position. I don’t know the db difference. 300b and 274 are only 4 pin vs 8 pin kt88 or 6550 so I believe that is why we feel like they are not tight but actually they are and very good grip they have. I doubled checked when you messaged. 

Yes, tubes do have very tight grip and fully seated but it still wiggle slightly. I saw the youtube clip by China-hifi on the  Boyuurange A50 MKIII 300. Those tubes also wiggled as he demonstrate the correct way to install 300B tubes.

One of the 300B tube at V2 position has a ringing sound when I touch and release, not sure if it effects the sound. I still have not plug in and test it yet.

On the Pre-in/OFF toggle switch, is the up position/pre-in for use the X9 as amp and plug in a preamp? and the OFF position is for using the X9 as an intergraded amp? I made out some words in Chinese but not all. Thanks for you help cb3489.