David Berning CoQuadrature ZusedDavid Berning Quadrature Z w/ Stillpoints circuit board standoffsCall Rick Brown at Hi-Fi One +1 612 817 1599 Website: rbhifi1.comFactory recertified with a new 2-year factory warranty. The circuit boards have been isolated from vibration with Stillpoints circu...20500.00

David Berning Quadrature Z w/ Stillpoints circuit board standoffs

Listing ID: lisa7cf9 Classified 
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hi_fi1 

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Condition
9/10
Payment methodsContact seller

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Ships fromCarlsbad, CA, 92009
Ships toWorldwide
Package dimensions26.0" × 26.0" × 12.0" (38.0 lbs.)
Shipping carrierFedEx
Shipping costFree
Original accessoriesBox, Manual
AverageResearch Pricing

Call Rick Brown at Hi-Fi One +1 612 817 1599  Website: rbhifi1.com

Factory recertified with a new 2-year factory warranty. 

The circuit boards have been isolated from vibration with Stillpoints circuit board stand-offs. A $3,000 option. 

Serial numbers 08302 and 08301. One perfectionist non-smoking owner. 

All three gain tubes (per channel) are Telefunken NOS from Andy Bowman at Vintage Tube Services.  Stillpoints Ultra feet are installed.

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, weigh 38 pounds each, self-bias and run anywhere in the world without adjustment. Plug-n-play. There are no user-replaceable fuses the amplifier's 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 in-branch Wells Fargo business account deposit is preferred. Other payment options are available.

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