Regarding the power you need, even 1-3 watts/channel will be more than sufficient if you do not listen to loud music. As far as building your own amp, do you have experience working with voltages which are potentially lethal? Tube amps operate at much higher voltages than solid state amps. Depending on the type of circuit employed, tube amps can have a very different sound from each other. A triode with a single output tube will sound quite different from a single pentode. Push-pull amps, which use 2 tubes in the output stage, have their own sound characteristics. For warm sound nothing can match a triode amplifier, but you need to accept that the bass will be somewhat "softer" and less "tight" than amps using pentodes; also, the power output of many triode designs is lower than with pentodes. There are many sites online with design information for simple triode amplifiers.
Great post! It's very nice. Thank you so much for your post.
How much watt from a DIY Tube
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Great post! It's very nice. Thank you so much for your post.