Less than 1 year old and pristine. These are 200W masterpieces by David Berning.
Can send anywhere in the world and they are universal voltage 100 - 240V.
HiFi_+ by Roy Gregory
"Even the briefest of listens to the Berning amps will make you realize that there’s something remarkable going on. Both the speed of the amps and the pace of the music, its ability to progress seamlessly from measured phrases to lightening quick runs of notes, is remarkable in the realm of hi-fi reproduction. It invests the playing with an expressive range, a mastery of time and space that’s captivating."
David Berning is considered to be one of the world's most respected amplifier designers. 20 years ago, after 20 years of designing and manufacturing tube amplifiers, Berning turned tube amplifier technology on its ear: In 1996 Berning invented the ZOTL (Zero hysteresis Transformer-Less) architecture. Radically different, it was and is still considered the most significant improvement to tube amplifier technology since the 60s.
Berning's ZOTL amplifiers consistently garner stellar reviews and recommendations from the world's top audio reviewers and magazines. In fact, his ZH-230 amplifier continues to receive the Absolute Sound Magazine "Editor's Choice Award" every year since 2011. The Berning Quadrature Z amplifier won HiFi+ magazine's "Product Of The Year" award for 2009.
The design of the Berning ZH270 power amplifier represented a radical departure from that of other amplifiers. The ZH270 was the first amplifier using all-tube amplification to properly match the high-voltage, low-current operating parameters of vacuum tubes to the low-voltage, high-current drive requirements of dynamic loudspeakers without using audio-output transformers. The technology is detailed in and a simplified overview is given below. The ZH270 has gained much respect for its transparency, versatility, and reliability, and has enjoyed a production run of over 10 years. The ZH technology has also proven itself in other recent Berning products as well.
The Quadrature Z applies the ZH technology to a higher power application, and in particular higher output current capability. The term "quadrature" refers to the interleaving of the impedance conversion process in that parallel impedance conversions are taking place with phase overlap so that all conversion dead time is eliminated. This means that the coupling between the output tubes and the speaker in the Quadrature Z is much tighter than it is with the previous ZH products. The impedance conversion in the Quadrature Z requires doubling the number of parts that are normally needed, and thus only the most demanding applications can justify the additional cost.