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DEALER AD: Autoformers - ZERO-Boxes

Item #649211154
Info: Autoformers - ZERO-Boxes

Asking Price:
CAD $1499.00
Payment method: Cash, Paypal, Cheque, Money Order, Money Wire, Interac/EMT
Condition: 11 - New (?)
Date Posted: Oct 17, 18 8:01pm (PST)
About Seller: C.N.Thomas Imports
cnthomas is a dealer or commercial user
Fonthill, ON
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ZERO-Boxes . A stereo pair of Autoformers used to increase the impedance of a pair of speakers so they look like an easier load to the amplifier.

The ZEROs are the simplest type of transformer called an auto-transformer or autoformer. They are used to multiply the impedance of any speaker so that it "feels" like the optimum load for the amplifier being used. They are very helpful in matching speakers to amplifiers. By adjusting the speaker's impedance, both the damping factor and the maximum power transfer of the amp/speaker can be tailored for best sound. Almost all amplifiers sound better when driving a higher impedance speaker, because amplifiers produce less distortion when driving less current.

The ZEROs are a great way to get better amplifier performance when driving low impedance speakers

The ZERO-Boxes are simply the "naked" ZERO-Autoformers installed in a beautiful hand crafted lacquer finished solid Cherry or Birdseye Maple wooden box with African Ebony wood accents on the four corners. The connections are available on Cardas solid Copper binding posts allowing you to use your favorite speaker cables. The single pair of binding posts are the connections that go to the speaker. The quad set of binding posts allow you to choose the multiplication factor (depending on which two of the four are connect back to the amplifier). Polarity passes through the box: Left in-Left out, Right in-Right out.

•60 day Trial Period
•Multiply any speaker's impedance by 1.4x, 2x, 3x, or 4x
•Example: a 4 ohm speaker becomes 6, 8, 12, or 16 ohms
•Includes a set of Jumpers to connect from the boxes to the speakers
•Made in USA (one pair at a time in Lake Elmo MN)

Typical Reported Sound Improvements:
•Lower distortion "sounds cleaner" (due to an easier load on the amplifier)
•Firmer bass (due to an increased damping factor)
•Higher resolution (due to an easier load on the amplifier)
•More extended and better focused high frequency.

•Use with any low impedance speaker
•A problem solving device for when there is an Amplifier/Speaker mismatch
•Popular when driving Magnepan speakers with Tube Amplifiers
•Enables using a tube amplifier's better sounding 8 ohm output tap when driving 4 ohm speakers (popular with Audio Research Corp. tube amp owners)

Greatly Increases Smaller OTL (output transformer less) Amplifiers' Output Power:
•Get 50 watts/ch out of the 30 watt Atma-Sphere S-30 amp
•Get 80 watts out of the 60 watt Atma-Sphere M-60 amp


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