• 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.

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The AKSA power amp is very good, the harmonic discord site has all the info on the power amp.

As for the valve pre, it is still in beta and the designer has asked to not post any reviews until it is ready for release. I agree totally with this as an amp is doing a road show around the USA at the moment for review by the listeners to improve on any faults it may have. My unit has behaved flawlessly!

For those interested for more info have a look at Aspen Amps or the HD site.