@tubes4good -- Thank you very much. Kind of you.
Tube preamp topologies and music
I am searching for a tube power amplifier. I know very little (nothing) about what the pros and cons of tube topologies as they relate to certain types of music.
as an example, let’s take hard rock/heavy metal. It seems to be the consensus that say 300b single ended amps would be the wrong choice even if you had 100+db efficient speakers. Why is this?
Also, tube compliment. 211? EL84? 300B? I understand that they have power output differences, but what else?
I welcome everyone’s input.
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So much commentary on single ended 300 B tubes and low wattage amplifiers. @jasonbourne71 has some outstanding commentary but requires great expertise to really understand things. My take away is that you risk higher distortion when you have low wattage amplifiers. I guess the speakers should be highly efficient but then this may lead to distortion when you want to turn the volume up in a bigger room. Maybe lower watt amplifiers are good for small rooms where higher wattage amplifiers Will have no problem filling a larger room. I didn’t follow the impedance curve tracking rationale where if it happens you’ll have increasing distortion. Impedance as a relates to lower wattage Single end tubes is not easy to understand for me at least but I’m open. I have 16 kt88s on my 300 watt tube monos and there doesn’t seem to be any distortion that I can here. |
Most single-ended tube amplifiers have relatively high output impedance a) because only one output device is being used and b) because they usually don’t use feedback, which also contributes to higher output impedance and poorer damping factor. Your amp uses multiple devices in parallel, and also most likely a good bit of feedback, both of which greatly reduce the output impedance and increase the damping factor.
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- 42 posts total