NEW Zesto Bia 200 Select Stereo Power Amp

Posted on 18 January 2022

Zesto Bia 200 Select Stereo Power Amp

Zesto Audio is proud to announce the launch of their new Bia 200 Select Stereo Power Amplifier.

This amp has 100 watts per channel of dynamic Class A power,
plus one of the most unique features in a tube power amp,

a 3 position "Auto Bias Select switch".

The Bia 200 ships with KT150 output tubes, but has the auto bias that can accommodate KT88, KT120 and KT170.
George Counnas, President and Chief Design Engineer of Zesto Audio says,
"I wanted to redesign the Bia to include KT150 or KT170 output tubes,
which were not available in 2012 for the original Bia.
George says what inspired the Bias Select switch is,

"I preferred the open sound of the KT150 and KT170's when they are not at maximum power for my Jazz,
but then again I really liked the full power for my Rock & Roll and sometimes it worked the other way.
Once I figured out the adjustable power, I realized I could also make it work for readily available tubes like KT88 and KT120.”

George admits, "My challenge in designing an amp is power with finesse.
What I mean is capturing the raw power of the crescendo of an orchestra and the solo of a piccolo.
I’m very proud of the sound and authority of this amp."
George said, "I design for the audio enthusiast who likes to have options.
It's safe and easy to use, you don’t need to be an engineer to use my products."
The Bias Select Switch
This switch provides 3 perfect auto bias settings for 4 different output tubes; KT88, KT120, KT150 & KT170.
The Bias Select switch is safe and easy to use, and you can change on the “Fly” so you can hear the difference.
It's designed for flexibility and sonic customization of an audio system.

Here's a summary of what’s new:

  • 100 watts per channel
  • Bias Select switch for 3 perfect bias settings for 4 different output tubes
  • Bias Select switch is safe and easy to use, change on the “Fly” so you can hear the difference
  • New tubes using KT150, but can also accommodate KT88, KT120 & KT170
  • New circuit design and grounding scheme
  • New Power supply design with larger mains Toroid
  • A more lively, dynamic musical sound
  • RCA or true floating transformer balanced XLR connectors
  • 2 independent ground switches to eliminate hum
  • 3 different taps, 4 Ohm, 8 Ohm and 16 Ohm to better match your speakers

For more info's:

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