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Consonance Cyber 800/845 Valve amps; how good?

In my quest for a new valve power amp l came accross these;

http://www.operaudio.com/Html/Opera-Products-CYBERSERIES.htm

Not much info around on these but their cheaper models are well respected. Look like amazing value for money, wonder if they have the sound to match?

Any owners or listeners on the Gon?

Cheers Mondie
mondie
tx_am
2 posts
 
I have a pair of Cary 845C, Cary could modify the amp. with the switch, so I could swap between 845 and 211 tubes. But the price was pricey. I have owned 1 NOS pair and 1 used pair on my previous broken amp. I want to used them but not know for sure which wires on the tube socket have to be swap. Anyone out there know about, please give me the information. Thank a whole lot.

Dan,
casouza
239 posts
 
Dan, 845 and 211 have diferent specs in terms of output transformer impedance, high voltage power supply, bias supply and plate current.
An 845 to 211 conversion is not trivial and a very dangerous project, due to the extremely high voltages inside the amp.
Maybe you should re-consider Cary's offer.

However, 211 tubes are less linear and put out more distortion than 845 tubes, which were designed for audio.
Unless you really need to use 211 tubes, IMO 845 is a better sounding tube, there are plenty on new production tubes that sound good (Shuguang 845B).
good luck
daviddsailor
19 posts
 
I have a pair of the latest 845S Opera's. They are brilliant. Even more so when I back off the plate current below centre scale.
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