• 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.

Altec 1570B


2005-06-17 6:58 am
What is your goal?

I've seen & listened to these amps several times.
What a monster!

Except for changing parts, all I can think of is changing the operation point of the output stage by re-bias them, and also adjusting to a proper HT. However with such a high voltage power supplies, I think it'd be very hard to deal with....

Here is an interesting article about this amp by Joe Roberts, digested from SoundPractices.