I have a VTL MB750 Signature amp with 12 6550C tubes per side. The recommended bias is 30ma, but I was wondering if ayone knew what would happen if I went higher or lower.
Yes, higher bias will increase the warmth, and decrease the tube life....sometimes drastically. Lower bias will make the sound less sweet, but will tighten it up and make it more dynamic. This is my experience with my old Dyancos.
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