Autoformers

[whatever55]

Has anyone had any experience with this item ?

http://www.zeroimpedance.com/Zero-New.html

[Guest " "]

yes.

This one, like a few others, basically work using the same approach the t2 autoformer works. 

As you increase impedance, distorion decreases, dampening factor increases.

There are cheaper products that do the same thing....the atlas AF140 at 50 bucks each and the crown CV-170 also at 50 each.

While the zero claims improvements for tube gear....some tube gear experiences shorter tube life at higher impedances.

[whatever55]

Thanks for the reply. I thought these might act something like the Autoformers on some McIntosh equipment.

[Erik Mandaville]

" I thought these might act something like the Autoformers on some McIntosh equipment."

A coincidence. A friend and I were talking about exactly this last night.

Erik

[Guest " "]

" I thought these might act something like the Autoformers on some McIntosh equipment."

I have a set of the zero's as well as a set of Mcintosh autoformers that were removed from an Mcintosh amp.

  Interestingly, the zero's weight aout 6lbs each. 

 The Mcintosh autoformers weight about 20lbs each.

I was able to use some sine waves to map out the impedance multiplication factors of each of the 8 taps on the Mcintosh autoformer.  So I was able to use a Mcintosh autoformer as a zero autoformer, in the same manner I could use an Atlas AF-140 or Crown CV-170 as a zero device.