• 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.

CLASS A TUBE AMPLIFIER FOR TWEETER

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Remember with triamping the speaker no longer has "protection" from a capacitor gainst DC signals from clipping. Biamping is a bit safer in this regard, but its harder to get a driver that would go from 150Hz (it has to do that to do the 300Hz part nicely) to 20K. So make sure your tweeter amp is not underpowered for this role. Clipping kills tweeters for a living.
 
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