Classical 8M can easily generate a room-filling sound when paired with small amps

5 Kathy's Waltz

which have a nicer glow appearance then the 5V heaters

+Ravel: Sonatine

Emission Labs, 520B-V3, 520B-V4 Rør - Parret par/2stk. Acoustic Energy Classical 8M can easily generateThe 520B is a long Anode Version of the older 52B, with many technical improvements added. The EML520B is a state of the art product, in the family of the 300B tubes. This powerful tube is recommended for new designs. The 520B has the same outside dimensions as the '845' tube, but longer Anodes. All critical parts, like filaments, grids and Anodes are constructed of hard metal for higher reliability and reproducible quality. Note the relation between