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In Reply to: RE: Bass control with low powered tube amps posted by tomtom58 on October 24, 2016 at 07:41:16
This explains why damping isn't particulary important:
http://www.diyspeakers.net/Articles/Richard%20Pierce%20DAMPING%20FACTOR.pdf
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A single ended triode amplifier without global feedback will have a damping factor much lower than 20, more like 3, and if it's connected to a speaker with a widely varying impedance curve (say a three way bass reflex speaker with a complex crossover), there will be noticibly variations in frequency response of the system. It's not a show stopper, but it makes matching speakers all the more critical. My amplifiers have damping factors of about 4-5, and it definitely impacts the frequency response with some speakers.
:-)!
Warmest
Tim Bailey
Skeptical Measurer & Audio Scrounger
Bookmarked.
Warmest
Tim Bailey
Skeptical Measurer & Audio Scrounger
I second your statement. A factor of 20 will cause variations of less than a dB. But be sure to use thick enough wire so it doesn't affect the damping factor of the amp.
Most SET amps have a damping factor of 3.
A damping factor of more than 20 makes no real difference.
With some speakers a damping factor of 3 vs. 20 will make a difference.
Tre'
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