thanks for the information

i just bought 2 x Mullard CV4010 waiting to arrived

Then tell us what you think.

At the Vanvouver Open House we A/B this:

http://www.space-tech-lab.com/SP-BUF-104.html

with the B-283. While it costs about 8 times more than the B-283, the sound was very, very nice although it is pretty ugly to look at and huge (we do consider WAF to be very high on the list). The B-283 still sounded nice in comparison, but it was hands down as to what was prefered.

The B-283 A is in the works, nice target to aim for in a better package and at a GF price.

ok no problem i also waiting my 6j1 to arrived buy 1 pair tube for spare

My Yaqin finally arrived after plug in i found those digital sound is gone other still not noticeable need time to burn in

but i found one of my tube is brighter its got problem

cuoreboy, normally I don't do any customer support for those that don't buy the Grant Fidelity versions, but since you are member of this great forum I will and I never get to do any customer service on the B-283, except for new use ideas.

Swap the tubes between channels and see if the extra brightness follows the swap. If it does, then the tube will likely have an issue, but that will be up to the tubes god's as to when. If the sound changes when you swap the tubes between channels then you should get replacement tubes.

If the brightness stays on the original channel then you have some circuit issues and you should send the unit back to whom you purchased it from for a replacement.

Hope that helps,

Ian

I concur with all Ian says - and just wanto say thank you for supporting our members here at ST - and, just want to add this :

Let them shine. I mean, let them "burn-in" for weak or two.

thanks for the help

-*test*-('")ed found the tube problem the brighter one found same even swap to another channel ..... but sound not noticeable, haiz now i still waiting the Mullard tube to arrived

let it burn in first .... now my tube is didnt off i just on it already on 2 days without off

this my setup :

Congrats. Great setup.

very nice setup you have, looks great!

Thanks for the 'let them cook for a bit' clint e, 100 hours is enough and congrats cuoreboy on leaving it on for the first 48 hours, you've read some of my posts somewhere . That is the recommended way to burn in any of our tube products, with some music playing (CD on loop play, etc), before turning it off for the first time.

cuoreboy, with your set up you are not going to enjoy the processor as much as you should. If possible get your system out of the corner at least a few feet and off the wall at least 1.5 feet. This will allow your system to soundstage and image properly. Also your bass from the left channel is currently being accented/diminished (wave additions and cancellations) that does not match the right channel which makes it next to impossible to get proper imaging.

Not sure how much room you have but your speakers seem really close together unless you are doing nearfield listening. Even then it is unlikely that you have your speakers toe'd in properly.

I have explained this in other threads:

1. With your speakers pointing straight out (un-toed), draw and imaginary line 60 degrees back from the inside fornt corner of your speakers so that these line intersect. Get you head about 1 foot inside the interesection point.

2. Listening to an acoustic bass toe-in your speakers bit by bit until you hear the bass merge into a single instrument.

3. Now listen the rest of the instrumentation, if there is still a 'hole' in the middle, toe the speakers in bit by bit until this 'hole' just disappears.

Your speakers should now have almost disappeared from the soundstage and you can now hear the magic of tubes as your soundstage expands and the tonal balance of instruments allows you to hear things you likely did not hear before.

I've gotten to the point now where I can do this in less than 2 minutes on other's systems and the results blow people away, many wondering why this isn't common knowledge. The above is also how many engineers position and set-up their recording mastering systems and isn't the whole point of great audio to try and reproduce the original recording, whether muilti-tracked or stereo mixes?.

Have fun.

Ian

actually i got playback the cd and let it run ... now already on for 3rd days is time to off it my cd player and amp getting hot
thanks for the information yeah my left speaker seem cant hear the right speaker feel louder bcoz my room size is limited infront of my system is bed i sit there have some coffee n enjoy the music hehehe

i try to move the speaker again now my speaker is off-axis position on axis the bass to hard n not focus until today i still found the best postion but cant get but normally how many degree

at first plan to get a tube amp but feel lack of bass the one i audit is single ended tube 12w x 2 from china for vocal really nice very thick and rich

no tube no life

thanks man

thanks man

Yesterday i was at a friend's house and he has Telefunken 6AK5's in his Yaqin buffer.
Sounds pretty good.