The Quadrature Z is a monoblock amplifier that retails for $33,000. You can get a brand new one right here on this site from the company's exclusive sales agent, a great guy to work with. Mine may as well be brand new. It's lightly used and in pristine, near mint condition inside and out as were the other items I've sold here recently. I'm sure my happy purchasers would attest for you personally. I did not find a single scratch or blemish while taking pictures in bright light and therefore the rating of nine. Regrettably selling for personal reasons.
You'll find all reviews range from positive to glowing or better. The advent of the OTL was a monumental achievement but damping and impedance mismatches were by-products. David Berning pioneered and patented solutions to the issues of load tolerance and heat dissipation. It's the ONLY solution in its class and the best solution this side of $75,000.
The Quad Z utilizes radio frequency re-mapping to circumvent the stresses of heat generating power consumption. Since the audio signal rides a carrier instead of a transformer there is nothing to distort the signal. This allows for a better than 25:1 turns ratio.
So the output tubes can work with lower current and higher voltage. The lower current greatly prolongs tube life while the voltage capacity remains largely unaffected. Re-mapping using radio frequency instead of an output transformer is some of the genius of David Berning.
So only 220 watts per channel with four tubes per channel. Normal usage provides for more than 20,000 hours of tube life! That could outlast your mortgage!!! My original 33JV6 tubes probably have fewer than 1,000 hours of usage. And you can easily find them online for less than ten bucks a piece!
You get both Quadrature Z amplifiers in their original boxes along with the manual. You'll need your own wires. Plug-N-Play anywhere worldwide. No additional fees for Paypal and the protections it provides you. This in lieu of a return policy. I pay for insured shipping anywhere in the continental United States. I will offer a discount for local pick up. Contact me to discuss if you want it shipped anywhere else or if you have any other questions.
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