I currently have four EH 6SN7 tubes in the linestage. What tubes are good for this preamp? I thought that only 2 of the 4 tubes really make a difference, but not sure on which ones, front 2 or rear 2. Not looking to spend a fortune on tube rolling.
Here's a list of what are considered the best of the 6SN7 family, and what you can expect, with regards their presentation: (http://www.tubeseller.com/ratings.php)
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