From Benson Amps:

Meet the Bellringer, our fresh take on the Chimera circuit with the notable addition being the Power Scaling circuit. We use 6L6 as a variable voltage regulator which allows you to dial the amp from the full 35 watt capacity down to 1 watt and introduces the sag and harmonic richness of a cranked amp at lower volumes not to mention extra saturation and subtle fuzz at lower volumes. The Bellringer is powered by a pair of EL34 tubes as opposed to the Chimeras quad 6V6 setup. Available in 1×12 or 2×12 configuration.