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Authorized dealers for Zesto Audio Bia 200 Select, 100 Watt Class A Stereo Power Amp

  • A/V Solutions — in-store — Pleasanton, California, United States (website)
  • Absolute Audio - Canada — in-store — Calgary, Alberta, Canada (website)
  • Altitudo Audio — online and in-store — Winnipeg, Manitoba, Canada (website)
  • Audio Gallery — in-store — Las Rozas de Madrid, Comunidad de Madrid, Spain (website)
  • Audio Philosophy — in-store — Baton Rouge, Louisiana, United States (website)
  • BELHIFI — online and in-store — Meise, Vlaams Gewest, Belgium (website)
  • Choice Audio — online and in-store — White Bear Lake, Minnesota, United States (website)
  • Deep Dive Audio — in-store — Palm Bay, Florida, United States (website)
  • East End Hi-Fi — in-store — Brookhaven, New York, United States (website)
  • Editors Choice HiFi — in-store — Paola, Kansas, United States (website)

and 10 more verified dealers

Potato score: 93.41

93%

Zesto Audio Bia 200 Select, 100 Watt Class A Stereo Power Amp #1
Zesto Audio Bia 200 Select, 100 Watt Class A Stereo Power Amp variant 1
Zesto Audio Bia 200 Select, 100 Watt Class A Stereo Power Amp variant 2
Zesto Audio Bia 200 Select, 100 Watt Class A Stereo Power Amp variant 3

Zesto Audio Bia 200 Select, 100 Watt Class A Stereo Power Amp

United States flag
View at Zesto Audio
Dual Mono Design
XLR Input
Balanced Output

Key Features


  • The Bias Select switch is engineered with 3 bias settings for 4 different output tube
  • Compatible with KT88, KT120, KT150 and KT170 output tubes
  • Bias Select switch is easy to use, change on the “Fly” so you can hear the difference
  • Auto Bias is safe, consistent and settings are always perfect
  • Class A power is fast for a more lively, immediate response to your music
  • 4, 8 & 16 Ohm taps gives you options for your speaker preference
  • Dual Mono gives you less cross talk and better stereo imaging
  • Choice of high quality gold plated Single Ended RCA or Balanced XLR connectors to suit your needs or cable preferences
  • True transformer differential balanced XLR inputs for the best noise rejection
  • Independent Left and Right ground switches on the XLR balanced inputs to eliminate ground loops and hums
  • No Negative Feedback design does not modify or compress the musical signal
  • Large custom Toroid is higher voltage for increased performance and lower noise
  • Global mains power supply can work all over the world
  • Provides plenty of gain for your system
  • Push-Pull/Ultra Linear circuit design provides lower distortion, more power, and a better performance out of your tubes
  • Low noise levels allow really dark black quiet musical passages
  • Non-inverting polarity retains the same phase as the input (so your trumpets blow and don’t suck)
  • Gold pin sockets are more reliable because gold doesn’t oxidize when it heat cycles
  • Matched quad KT150 output tubes retain the stereo balance and lower noise
  • Elegantly designed, heavy duty 14 &16 gauge zinc plated steel enclosure to accommodate the extensive grounding scheme
  • The optimized frequency response provides the best musical range to benefit the natural harmonic structure of the instruments
  • All fuses are easily accessible
  • Each unit is hand built “Made in the USA”
Dealers selling Zesto Audio near you

Authorized dealers for Zesto Audio Bia 200 Select, 100 Watt Class A Stereo Power Amp

and 10 more verified dealers

Join us at T.H.E. Show SoCal 2026!

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Overall Score 93/100

Rating for [object Object]

Deliciously Crispy

Zesto Audio Bia 200 Select — 100 Watt Class A Stereo Power Amp

Zesto Audio's Bia 200 Select is a Class A 100W-per-channel stereo amplifier that marries tube warmth with solid-state control. Reviewers such as Robert H. Levi and Audiophilepure praise its near-transparent, artifact-free presentation, a jet-black background and superb imaging that lets recordings breathe. With matched KT150 quads, an innovative auto-bias/tube-select switch and a dual-mono, toroidal-fed design, the Bia 200 delivers authoritative slam, huge headroom and delicate micro-dynamics while remaining remarkably quiet. Hand-built construction, gold-pin sockets and thorough factory burn-in underline its boutique pedigree. Ideal for serious listeners seeking a powerful, resolving tube amp that can bridge tube and solid-state sensibilities, the Bia 200 rewards tube-rolling and careful system matching. For those willing to invest, it’s a compelling flagship-level amplifier.

Positive Feedback

"I have never heard such glorious truthful amplification from a 100-watt stereo amplifier in my entire audiophile life, now spanning 60 years."

Pros

  • Reference-level neutrality and ultra-quiet background that preserves microdetail and delivers pinpoint imaging.
  • Outstanding dynamics and headroom with authoritative slam and control across frequencies.
  • Flexible, user-friendly tube support via the auto-bias/tube-select switch (KT88/KT120/KT150/KT170), enabling effective tube rolling without complex mods.

&

Cons

  • Price is steep for most buyers (retail $15,900), placing the Bia 200 firmly in the high-end boutique segment.
  • Some tube and bias combinations can sound muddy or overly aggressive, so owners should expect to experiment to find the optimal setting for their speakers.

Sound Quality

95/100

Dynamics

95/100

Reviewers repeatedly praise exceptional headroom, slam and control: Positive Feedback notes 'headroom galore', 'never runs out of gas' and that the Class A tetrode design is unflappable. Audiophilepure also calls the amp 'powerful' and 'resolving.' Given the 100 W into 8 ohms tube Class A topology with matched KT150 quads and reviewers' language about authoritative drive and control, this earns reference-class dynamics for its topology and power band.

Soundstage Imaging

94/100

Multiple reviewers highlight exceptional imaging and a very black background: Positive Feedback cites 'pinpoint imaging' and 'most realistic presentation of all tubes tried,' and Audiophilepure mentions a top end that 'seems to go out for miles' and sonorous bass that lets recordings 'shine.' The amp preserves and enlarges spatial cues, earning a near‑reference imaging score.

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Build Quality

92/100

The spec sheet and reviews indicate high-quality construction: hand-built, dual-mono layout, custom toroidal transformer, matched KT150 quads, gold‑pin tube sockets, and thorough factory burn-in. These design and component choices (dual mono, robust power supply, heavy chassis) justify a strong build-quality score; no reviewer raised systemic reliability or thermal concerns.

Value for Money

86/100

Price is $15,900 for a 100 W/channel Class A tetrode tube amp. Reviewers focus on sonic excellence but do not explicitly evaluate price vs peers; therefore a neutral baseline is applied. At this high-end price point the amp must be judged against boutique tube and high-end solid-state alternatives — reviewers praise its ability to bridge tube and solid-state performance, which supports the amp offering reasonable value for buyers in this segment, but lack of explicit value-language keeps the score conservative.

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