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.

Looking for Reviews of Tube Power Mono Amp "GBMo-2" from German's Brand "Gräfenberg"

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tiefbassuebertragung.de

On the web there isn't find any information.
Maybe one of the member know this power amplifier or at least the brand - thank you for advices.

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