Most "holophonic" 3D sounding tubes for my MKIVse?
Nov 25, 2008 at 7:09 AM Thread Starter Post #1 of 2


100+ Head-Fier
Sep 3, 2007
Mill Creek, WA
I've had my MK IV SE for about a week now. It came with CV4010 tubes which I found very neutral sounding, very SS like, which isn't exactly what I was looking for, so I bought some Russian 6Zh1P-EV tubes. BIG difference, I definitely like them better, but of course the upgraditis bug strikes whenever it wants to and now I'm looking for the next tube to try out.

What would you recommend as the most "holophonic" 3D sounding tube for my MK IV SE? I've read about the LM Ericsson 403B and it seems like that might be what I'm looking for, but surely there are others or something better? I'm also thinking about the Tung-Sol 6AK5W for it's reported excellent bass qualities.

Any advice on where to buy tubes for a decent price? eBay is the only place I can find those two tubes above, and they are a bit overpriced.

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