David Berning CoQuadrature ZusedDavid Berning Co Quadrature Z 25wpc  class AThis amplifier built in Jan 2015 represents a very special version of the Quadrature Z. It operates its 33JV6 output tubes in pure class A. At 25 watts per channel, it can very effectively drive me...22000.00

David Berning Co Quadrature Z 25wpc class A

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Condition
9/10
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Ships fromCarlsbad, CA, 92009
Ships toWorldwide
Package dimensions26.0" × 26.0" × 15.0" (80.0 lbs.)
Shipping carrierFedEx
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Original accessoriesBox, Manual
AverageResearch Pricing

This amplifier built in Jan 2015 represents a very special version of the Quadrature Z. It operates its 33JV6 output tubes in pure class A. At 25 watts per channel, it can very effectively drive medium to high-efficiency loudspeakers. It is the precursor to the 211/845 60 wpc class A amplifiers.

It was built to address the low power (25 wpc) but full class A operation end of the OTL spectrum. The standard version Quadrature Z utilizing the same 4 output tubes per channel addresses the high power (225 wpc) in class A/B operation end of the spectrum.

Both amplifiers are the same size, weigh the same and the external appearance is identical. One word differentiates the sound of the two versions -- purity. The trade-off is power, 25 wpc vs 225 wpc.

This series was built as a limited production model. Exactly like the seminal and groundbreaking Berning 5 wpc 300B Siegfreid which still sells for over 100% of the original retail price. It was introduced in 1998!

These amplifiers are no longer in production, but like all Berning amplifiers, they are fully supported. Moreover, as the global sales representative for the David Berning Company, a limited to the purchaser, 1-year warranty will be in effect. It covers all tubes and repairs given normal operation of the amplifiers and when returned in the original packaging. Additional details by country will be provided upon purchase.

Like all Bernjng OTL designs of the past 20 years, load tolerance is singularly unique vs the OTL competitive set based on its patented impedance matching circuitry. These amplifiers have excellent bass without caveat. Transient speed, power transfer, transparency and lack of coloration are exemplary.

The class A Quad Z is an innovative, patented and technologically advanced tube amplifier utilizing a high-speed Berning designed and built switch mode power supply and full power factor correction. These amplifiers have built-in AC filtration, weight 38 pounds each, self-bias and run anywhere in the world without adjustment. Plug-n-play.

They stand alone where low power OTL amplification is concerned today just as the Siegfried did in 1998. Truly 'technology in the service of music'.

Stillpoint stainless steel Ultra feet are fully integrated and all inquiries will be promptly and succinctly answered. Please check my feedback.

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