Audio Note Conquest Silver Signature vs. Bat VK-60

"The 300B is an amazing sounding tube, designed for audio. The 6C33 triode used in the BAT was certainly not."

While 6C33 may originally have been originally designed for russian military applications, its suitability for high end audio(in SE applications as well) is accepted by Lamm, BAT, and others.

Not trying to 'dis Audio Note here. 300B amps certainly have their following.

BTW, the BAT topology is not push-pull, but rather single-ended bridge(similar to Atma-Sphere), as described by Victor Khomenko:

"The VK60 is neither a traditional single-ended design nor a push-pull design. We refer to the VK-60 through VK-1000 amplifiers as single-ended bridge designs. This fundamental circuit dates back to the early 1950's and was invented by Henry Wiggins while working for the ElectroVoice Company. The original name for this type of output topology was Circlotron. The single-ended bridge design relies upon two single-ended amplifiers arranged in a floating bridge formation. This differentiates it from other forms of bridge topologies, most of which effectively incorporate two push-pull sides. The output circuit is inherently balanced and is driven differentially from a preceding stage. The two DC bias currents that exist in each half of the output stage cancel each other in the load. It is a more expensive way of building an amplifier as it requires multiple floating power supplies, as opposed to the more traditional ground-referenced supplies. The benefits of this approach, however, include enhanced symmetry when compared to push-pull designs and lack of the DC saturation problem inherent to single-ended designs."