Decware Zen Triode amplifier

Decware Zen Triode Amplifier
I used it with Martin Logan Prodigy in monoblock mode.

• It's Hand Crafted directly by Decware - A notch above mass-produced retail.


• A signal path featuring a mere 2 resistors and 1 capacitor.


• Decware's highly interleaved UFO output transformers made in the USA.
  
  


• It's a class A SET amplifier that can handle dips down to 1 ohm.

The Zen Triode Amplifier (SE84UFO) is an SET which means Single Ended Triode. It uses a single EL84/6P15P output tube per channel driven by a 6922/6N1P dual triode. The two stages are connected by one capacitor giving the entire signal path a parts count of only 4 components; A capacitor, a transformer and 2 resistors. The amp is built point to point with only 11 solder nodes between your source and your speakers. In addition to this extreme simplicity, there is also no negative feedback. The resulting transparency would be impossible from any solid state design and even most tube designs.

This circuit features a floating output stage that can be series or parallel strapped into mono making it easy to have more power by simply adding a second amp.

The amp features a pair of inputs that are selected via a silver contact toggle switch located at the front.  There is also a volume control on the front that can be used for volume when running direct with no preamp, or can be used as a gain control when being run with a preamp.

The amp also features a self biased output stage which is 100% stable making bias runaway and premature tube failure obsolete.  It eliminates tedious adjustments making the amplifier virtually maintenance free.  

UFO stands for Ultra Fidelity Output transformers. These proprietary Decware transformers push what's possible in a boutique output transformer design with a high degree of precision and the very best steel yielding a bandwidth 5 times wider than human hearing so that the response in the audio band becomes ruler flat.