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In Reply to: RE: Tubes tested & burned in for 48 hours at audio research posted by Chip647 on February 13, 2017 at 17:06:22
If you buy a new piece of ARC equipment the tubes will have closer to 100 hrs on them.
48 hrs burn-in on the tubes before they are tested.
48 more hrs after the equipment is built, the unit is left powered up for 48 hrs burn in time.
Next it goes to Warren where he listens to it. If Warren hears something he doesn't like it goes back on the bench for testing.
Below is a great video to watch on the ARC factory if you have not already seen it.
Part one of two parts.
ARC also said that their equipment sounds best when it reaches 600 hours. Ive not experience this breaking in period since I buy my ARC preowned. Thats why when I buy preowned late model ARC, it has a tube hour counter. They usually advise to replace the power tubes when they reach 2000 hrs while w/ small signal tubes at 4000 hrs. But I dont purchase tubes from them. I get them from one of our sponsors Jim McShane. Im from overseas ( the Philippines) and our small group have not had any catastrophic tube failures so far. I ordered tubes for my friend's REF 750 ( KT 150's ) , REF 250 ( KT 120's ) Classic 150 (KT88's) , VTL Siegfried ( 6550's & KT 88's ) , so far so good ! Is it as good sonically as the one from ARC , that I dont know .
'Is it as good sonically as the one from ARC , that I dont know .'
Easy question to answer: yes. A tube is a tube. There is nothing magical or particularly special about ARC's burn-in and testing process. Their process is no better than say the burn-in and screening you get from Jim McShane.
I have purchased tubes for my ARC gear for over a decade from Jim McShane. The quality is excellent it does not get any better. I would say his burn-in, screening and testing get no better. His matching of power tubes is actually better, tighter than ARC matched power tubes.
Bottom line is a Soviet 6550WE is going to sound the same from Jim or ARC. The only difference is ARC will charge $90 for the tube and Jim will charge around $30.
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