211/845

About the 211/845

The David Berning Co 211/845 Monoblock Amplifiers are state-of-the-art single-ended triode power amplifiers that deliver 60 watts of pure Class A power without output transformers, utilizing proprietary ZOTL (Zero Output Transformer Logic) technology. They can operate with either 211 or 845 Western Electric replica output tubes, hand-matched and selected by David Berning. The amplifiers feature fully automatic biasing for either tube type, zero global feedback, and constant output impedance across the audio spectrum. They provide both balanced and single-ended inputs, low noise floor suitable for high-efficiency speakers, and proprietary switch-mode power supplies with high energy storage and full power-factor correction for global plug-and-play operation. The design emphasizes natural, believable musical presentation with exceptional clarity, immediacy, and spacious 3D soundstage. The amplifiers are hand-crafted in limited quantities due to the proprietary parts and craftsmanship involved.