WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
Building, troubleshooting and testing of these amplifiers should only be
performed by someone who is thoroughly familiar with
the safety precautions around high voltages.
Anyone have schematics on the driving circuit for the Acapella plasma tweeters? There are a number of DIY designs around the net, but all I found are by non-audiophiles, so I doubt they are be hi-fi quality.