• 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.

8ohm speaker on 15 or 3.5 ohm tranny

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EC8010

EC8010

Ex-Moderator
Joined 2003
Use the 4 Ohm connection. "8 Ohm loudspeaker" is pretty meaningless anyway. If you were to measure its impedance against frequency, you would find that it wobbles all over the place due to mechanical resonances, crossovers, and voice coil inductance. If you use the 4 Ohm tap you may lose a little power. If you use the 15 Ohm tap you will lose far more power and gain a lot of distortion.
 
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