David Berning CoQuadrature Z usedDavid Berning Quadrature Z  Hi-Fi One editionCall Rick Brown at Hi-Fi One +1 612 817 1599 These monaural amplifiers were completely rebuilt to the latest specifications by David Berning in August 2020. A new chassis including th...29300.00

David Berning Quadrature Z Hi-Fi One edition

Listing ID: lis9bgeh Classified 
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Time Left:16 Days
New Retail Price: $36,300.00


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Ships fromCarlsbad, CA, 92009
Ships toWorldwide
Package dimensions26.0" × 26.0" × 12.0" (60.0 lbs.)
Shipping carrierFedEx
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Original accessoriesBox, Manual
Agon miniAverageResearch Pricing

Call Rick Brown at Hi-Fi One +1 612 817 1599  

These monaural amplifiers were completely rebuilt to the latest specifications by David Berning in August 2020.    

A new chassis including the Hi-Fi One 20 pound copper 'Gravity Base' with integrated Stillpoints Ultra bases and stainless steel feet are included.

This amplifier is the final iteration of the Quadrature Z and comprehensively improved top to bottom with greatly improved bass weight and authority.

A new full factory warranty is included. Hi-Fi One is the global and exclusive 'direct to client' sales agent of the David Berning company.
220 watt per channel OTL incorporating the latest circuitry trickled down from the flagship 60 watts per channel class A 845 ZOTL.  
The QZ amplifiers will drive very difficult loads like the MBL 101's, Apogee Divas, and all Maggie loudspeakers based on their patented ZOTL impedance matching circuitry.     

There are no other OTL's and very few vacuum tube amplifiers that can make this claim. Load tolerance is one singularly unique Berning OTL attribute.

Transient speed, bass impact, transparency, and lack of coloration are exemplary and well chronicled in many reviews all over the world.  
No other OTL can produce 220 wpc with a total of 4 output tubes per channel. All other OTL amplifiers are conventional with all the caveats that accompany directly driving a loudspeaker w/o an output transformer. 

The QZ 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. 

Moreover, the 33JV6 output tubes will last 20,000 hours and many have been running with the original tubes for over 15 years. That is only possible running the tubes as they were intended by their mfg's to be utilized. Not like all other hot-running, short tube life, conventional OTL competitors. 

These amplifiers have built-in AC filtration, weight 58 pounds each, self-bias and run anywhere in the world without adjustment. Plug-n-play. There are no user-replaceable fuses the amplifiers protection circuitry is that effective. No more chasing expensive audiophile fuses.  

They stand alone where high power OTL amplification is concerned today just as they did when introduced in 2005 in its first iteration. 
"Technology in the service of music" is more than a sales slogan with the David Berning company and Hi-Fi One.

Wire transfer or direct branch deposit into my Wells Fargo business account is preferred. Other payment options are available.

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