[Lost81]

Ok, this guy is a maniac. He is building a tubed-sub-subwoofer amplifier. It will use a 17V, 18A (yes, 18A) heater filament. Yes, 306W just to heat the filament.

Operating parameters of B+ circuit: 2kV @ 500mA.

<SNIP>
23-05-2001:  People around me are convincing me to build this amp, but for all the wrong reasons I think. I really haven't heard any questions on how it will sound, just: "how bright does it glow?", "how big is it?", "will the B+ cause sparks?",  "how much power does it use up without even giving off music?"... hehehe ))
<SNIP>

http://www.vt52.com/diy/myprojects/amps/gm100/gm100.htm

[mamsterla]

He's nucking futs!

[JohnR]

Single-ended for a subwoofer? Won't the output transformer core need to be gigantic to generate output at low frequencies?

I think the only sensible thing to do is get a second tube and make a 1000W push-pull amp.