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.
The leak TL 12+ are the best of the Leak series, much better than the earlier TL12 with KT66's which has a very poor quality out put transformer, no bass. The leak pre-amps are not very good, the phono stage is terrible, you would be much better making a pre.