Zesto Audio Bia Tube Power Amplifier
Zesto Audio Bia Tube Power Amplifier
MY TAKE:
The Zesto Bia power amplifier is truly a wonder. Its remarkable sense of clarity and realism is addictive and some would say groundbreaking. - Galen Carol
OVERVIEW: By George Counnas, designer
Design Philosophy
With my pro background in the recording studio and live concert mixing, I wanted to build an amp that allowed me to hear music the way I know it should sound. I wanted it to be easy to use, reliable and with plenty of power to drive the speakers. In short, I wanted power without compromising the music.
Class A Design
The tubes are always on, so you have power when you need it. Class A is fast and responsive. There is no lag, providing your music more punch, transient response, better dynamic range and transparency.
Circuit Topology
I choose a Class A Ultra-linear, Push-Pull circuit design to deliver the most precise, enjoyable and faithful reproduction possible.
Unsung Hero
The unsung hero of a power amp is its power supply. That’s why my design incorporates a custom Toroid power transformer and a choke-based, dual-mono power supply–to deliver all the “slam” you can handle.
Easy to use
With Auto Bias, you need no adjustments. It’s safe, consistent and the settings are always perfect so you can enjoy your music.
What is Bia?
In Greek mythology, Bia is the Titan Goddess of force and power.
REVIEWS:
"I am flabbergasted. The more I listen to the BIA 120, the more I am certain this magnificent amplifier is the real McCoy! The BIA 120 is a state-of-the-art tube amplifier. The BIA 120 has superb clarity, depth, neutrality, realism, nuance, elegance, and ultimate definition that a great tube amplifier should have. It has the kind of snap, low distortion, freedom from noise and haze, tight fast bass, speed, and slam you would expect from great solid-state amps. It has none of the troublesome problems or sonic artifacts of either tube or solid state designs. It is neutral like no other tube amp has ever been in my experience. It is a wonder!
"Zesto has created an amplifier that, when placed with the best ancillaries, will give you the experience of the musical performance with ground-breaking intense realism. The only things missing will be the sticky floors and the expensive tickets. I have never heard a better amplifier in my reference system, tube or solid-state. It is the best new tube amplifier to reach the market in the last five years priced under $50,000. That it costs $12,500 is a boon to audiophiles everywhere, and a minor miracle. What a value!
"The Zesto Audio BIA 120 Class A Stereo Power Amplifier is most highly recommended. I urge you to listen to it so you may understand just what a George Counnas-designed tube amplifier is all about.
"In a word, stupefying." - Robert H. Levi, Positive Feedback
2014 Golden Ear Award Winner - "Styled to match its Zeto linestage and Andros phonostage, Zesto’s new Bia 60Wpc, Class A, all-tube power amplifier lands the company the trifecta. Cut from the same sonic cloth as the preamps, Bia’s personality consists in a completely seductive musicality, free from all the usual sorts of electronic colorations and artifacts, for a presentation that never, ever sounds electromechanical, instead always wholly natural. Dynamic range is prodigious: The Bia even drove PS’s inefficient Quad ESL 2805s to clear, clean, unstrained levels (a magnificent combination, by the way). Although the spectral balance stays within the bounds of a broadly defined neutrality, it is not completely accurate, being more beautiful than real. Luscious, velvety, silken, gorgeous, it’s the kind of sound around which audio cults develop, and it’s easy to imagine its owners years, even decades hence treasuring the Bia the way others do classic McIntosh and Marantz components." - Paul Seydor, TAS
Key Features
Specifications
Output
Inputs
Detailed Specs
Power
Other Features
Zesto Audio Bia Tube Power Amplifier
MY TAKE:
The Zesto Bia power amplifier is truly a wonder. Its remarkable sense of clarity and realism is addictive and some would say groundbreaking. - Galen Carol
OVERVIEW: By George Counnas, designer
Design Philosophy
With my pro background in the recording studio and live concert mixing, I wanted to build an amp that allowed me to hear music the way I know it should sound. I wanted it to be easy to use, reliable and with plenty of power to drive the speakers. In short, I wanted power without compromising the music.
Class A Design
The tubes are always on, so you have power when you need it. Class A is fast and responsive. There is no lag, providing your music more punch, transient response, better dynamic range and transparency.
Circuit Topology
I choose a Class A Ultra-linear, Push-Pull circuit design to deliver the most precise, enjoyable and faithful reproduction possible.
Unsung Hero
The unsung hero of a power amp is its power supply. That’s why my design incorporates a custom Toroid power transformer and a choke-based, dual-mono power supply–to deliver all the “slam” you can handle.
Easy to use
With Auto Bias, you need no adjustments. It’s safe, consistent and the settings are always perfect so you can enjoy your music.
What is Bia?
In Greek mythology, Bia is the Titan Goddess of force and power.
REVIEWS:
"I am flabbergasted. The more I listen to the BIA 120, the more I am certain this magnificent amplifier is the real McCoy! The BIA 120 is a state-of-the-art tube amplifier. The BIA 120 has superb clarity, depth, neutrality, realism, nuance, elegance, and ultimate definition that a great tube amplifier should have. It has the kind of snap, low distortion, freedom from noise and haze, tight fast bass, speed, and slam you would expect from great solid-state amps. It has none of the troublesome problems or sonic artifacts of either tube or solid state designs. It is neutral like no other tube amp has ever been in my experience. It is a wonder!
"Zesto has created an amplifier that, when placed with the best ancillaries, will give you the experience of the musical performance with ground-breaking intense realism. The only things missing will be the sticky floors and the expensive tickets. I have never heard a better amplifier in my reference system, tube or solid-state. It is the best new tube amplifier to reach the market in the last five years priced under $50,000. That it costs $12,500 is a boon to audiophiles everywhere, and a minor miracle. What a value!
"The Zesto Audio BIA 120 Class A Stereo Power Amplifier is most highly recommended. I urge you to listen to it so you may understand just what a George Counnas-designed tube amplifier is all about.
"In a word, stupefying." - Robert H. Levi, Positive Feedback
2014 Golden Ear Award Winner - "Styled to match its Zeto linestage and Andros phonostage, Zesto’s new Bia 60Wpc, Class A, all-tube power amplifier lands the company the trifecta. Cut from the same sonic cloth as the preamps, Bia’s personality consists in a completely seductive musicality, free from all the usual sorts of electronic colorations and artifacts, for a presentation that never, ever sounds electromechanical, instead always wholly natural. Dynamic range is prodigious: The Bia even drove PS’s inefficient Quad ESL 2805s to clear, clean, unstrained levels (a magnificent combination, by the way). Although the spectral balance stays within the bounds of a broadly defined neutrality, it is not completely accurate, being more beautiful than real. Luscious, velvety, silken, gorgeous, it’s the kind of sound around which audio cults develop, and it’s easy to imagine its owners years, even decades hence treasuring the Bia the way others do classic McIntosh and Marantz components." - Paul Seydor, TAS
Key Features
Specifications
Output
Inputs
Detailed Specs
Power
Other Features