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In Reply to: 2 matched pairs versus matched quad 6550 posted by Jonesy on October 6, 2014 at 08:44:19:
If the amplifier is 2 6650's per channel, you only have to a matched pair in each channel. If it's a parallel push pull, you need a matched Quad unless you can bias each tube individually.
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Follow Ups
- RE: 2 matched pairs versus matched quad 6550 - truep 08:14:29 10/07/14 (0)