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My Jolida Glass Fx Tube DAC has 2 x 12AX7 valves. I see that the one valve "glows" quite a lot brighter than the other. Does this mean that one of them is on its way out? My second question is what would you recommend as a replacement / upgrade from the standard Tung Sol tubes and where is the...

Anyone used this or similar CD. Some of the claimed benefits seem hard to believe. "Included are tracks dealing with Balance, Wiring and Polarity, Speaker Placement, Sound staging, Imaging and Depth, Absolute Phase, Component Demagnetization and Burn-In" Is this just more audiophoolery?

I'm currently connecting my laptop to my newly acquired Jolida DAC (thanks Alan) with an old printer USB cable. So far the SQ is very good but I want to ensure that there is no weak link in the chain and have I've been looking into better cable options at a reasonable price. Has anyone tried...

Hi All, (my first post) I need help with this problem System is Linn - LK1 to Aktiv crossover to 3 LK280 pwr amps to Isobariks. Power from Aelian Hush AC Bus. I have a buzzing sound from one of my amps, the one feeding the tweeters. It occurs after the system has warmed up. I suspect a...