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In Reply to: RE: Best sounding tubes for ARC SP-9 MK3 posted by Jonesy on June 20, 2020 at 21:02:54
The golden dragon 6dj8 tube from China had a very short run.
I read that retired Mullard tube designers went to China and gave them their help.
At one time they were sold by ARC.
They were discontinued and the brand name bought by the Russians.
The SP-9 mk3 was a big upgrade from the mk1 and mk2, with a power supply twice the size , better caps, and modified phono and line stage.
I have never found a review of the mk3, but many people liked it.
Member Estat use to own a mk3..
Yes. Mine was purchased used as a MKII and shortly afterwards had factory updated to MKIII. It was a pretty significant upgrade - fixed the lean lower midrange tonal balance, improved transparency and dynamics.
My favorite was Amperex PQ 7308s.
I have a large collection of tubes but no 7308s.
I have owned the SP-9 MK1, Mk2, and MK3 in addition to the SP-14. The MK3 was the best.
They all seemed to require a couple of days warm up to sound at their best IMO.
I run the MK3 24/7 and change tubes after 7.5 months, since I use the system every day.
Tubes warm up faster than FETs. After all, these are tube/FET hybrids. This was true of a ARC D125 power amp I also have.
I am using the MK3 in my home theater setup with a Sovtek 6922 place holder in the phono section.
I know you prefer NOS but give a set of the 6922 Genalex Gold Lions a try. McShane can provide various tested noise levels.
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