View Full Version : Does it matter what ohm speaker while biasing?
kiteman
October 8th, 2010, 12:39 PM
I biased my amp while plugged into my 16 ohm cab but the amp is 8 ohm with an 8 ohm speaker.
Does that make a difference while biasing?
jim p
October 8th, 2010, 04:04 PM
The bias on an output tube is its DC operating point so the load on the secondary side of the transformer will have no effect on the results when using a volt or current meter to set it (Because a transformer will only pass AC signals). Even if you were using a scope to check for crossover distortion I don’t think the load on the secondary would have much effect.
Just to add you do need a load on a tube amp even a mismatch within a factor of two a resistor instead of speaker ect.
kiteman
October 8th, 2010, 04:06 PM
Thanks. That's a relief. :)
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