For a while I had a real love hate relationship with a Graaf GM20.
while with a bit of nudging (adding autoformers to improve driving ability) it could sound wonderful and looked glorious, it equally was prone to heat a room all by itself and each time the tubes needed biasing had to be dismantled to get to the biasing points. In the end I decided it had to go.
while with a bit of nudging (adding autoformers to improve driving ability) it could sound wonderful and looked glorious, it equally was prone to heat a room all by itself and each time the tubes needed biasing had to be dismantled to get to the biasing points. In the end I decided it had to go.