Zesto Audiox
Amplifiers
DACs
Preamplifiers
Best Known For
Amplifiers
/
Class: Tube
Used Products
0
 Available
Average Price
$10,001-$20,000
Brand Popularity
693
 of 900+
Products Listed
8
Review Count
20
Founding Year
2010
Headquarters
United States
Zesto Audiox
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.

What's unique about the brand

Zesto Audio specializes in tube amplifiers that uniquely operate with no negative feedback, including their flagship Eros 500 Select monoblocks that offer pure Class A push-pull operation at high power levels. Their products stand out for their flexibility in tube selection and unique features like the Presence Control in their preamps, which manages high-frequency noise and acts as a loudness control at low volumes.

What reviewers are saying

We read all the reviews. Here's what reviewers feel most strongly about:

  • Zesto Audio's products are hand-built in the USA and undergo a 50-hour factory burn-in to ensure optimal performance right out of the box.
  • The brand prioritizes all-tube designs, believing tubes offer inherently superior musicality and speed compared to solid-state devices.
  • Zesto Audio's phonostages uniquely offer independent ground lift switches for each channel, providing enhanced noise reduction capabilities.

Our favorite reviewer quotes:

  • "In my experience, the Bia 200 Select is the most mellifluous and realistic-sounding amplifier, tube or solid-state, currently produced anywhere within its power rating, and with only two output tubes per channel. It is an absolutely breakthrough design, fabulously flexible, and capable of maximizing current and NOS tubes for decades to come." (https://positive-feedback.com/reviews/hardware-reviews/zesto-audio-bia-200-select-stereo-amplifier)
  • "I have never heard this level of transparency and neutrality coupled with the unlimited power reserve of the Eros 500. The freedom of unfettered musical realism and unlimited resources resolves even the sound of a flute with enhanced perfection." (https://www.enjoythemusic.com/superioraudio/equipment/0223/ZestoAudioEros500SelectClassAMonoblockReview.htm)
  • "The stellar new Zesto Audio Eros 500 Select Class A monoblocks, inserted in my system with no other changes upstream, revealed via my decade-old Marten Bird loudspeakers a fully transparent window to the upstream music source in my system. I have waited a long time to say this, but with the new Eros 500 amplifiers you will achieve as complete transparency to the performance as your speakers, sources, and cabling will allow." (https://www.enjoythemusic.com/superioraudio/equipment/0223/ZestoAudioEros500SelectClassAMonoblockReview.htm)
Want to report a correction? Please contact us. We'd love to hear from you. Note that much of the data, recommendations, and summaries on ExtremeHiFi are researched after thousands of hours of loving labor. We archive our site's data and its pages on Archive.org and monitor for those repurposing the data. We also fingerprint data to know when text and numbers came from us.

Our interview with the brand

What are two key technological innovations or strong opinions that differ you from other brands?

What's your approach to customer support?

What are your favorite tracks for showcasing the strength of your products?

What other products pair best with yours?

From Julian's interview with
.

Lineup comparison

We think it's helpful to understand how their products compare. To learn more about each, scroll to the section above to click through to individual product pages.

Andros Deluxe II Phonostage  

  • Positioning: A lower-priced option focused on essential vinyl playback.  
  • Description: Offers clear vinyl reproduction with a straightforward analog circuit and precise calibration features that bring out natural record details. Compared to the Tessera Reference, its simpler design suits smaller rooms and tighter budgets.

Andros Tessera Reference Phonostage  

  • Positioning: A premium phono stage that targets users seeking enhanced vinyl performance.  
  • Description: Delivers improved analog-to-digital conversion and refined signal processing that highlights fine record details and dynamic performance. In contrast to the Deluxe II, its advanced circuitry and extended adjustment options provide greater technical sophistication and versatility.

Leto Ultra II Preamplifier  

  • Positioning: A versatile source management unit designed for precise signal handling and integration.  
  • Description: Features a low-noise design and unique signal routing that help maintain clarity and an expansive soundstage across multiple inputs. When compared with the phono stages, it offers more connectivity and control options.

Bia 200 Select  

  • Positioning: A high-end integrated amplifier that combines robust amplification with refined control.  
  • Description: Uses a carefully balanced circuit design and precise thermal management to provide reliable dynamic output and clear audio delivery. Compared to the preamplifier, its focus on powerful amplification adds technical features and control options.

Eros 500 Select Power Amp  

  • Positioning: The flagship power amplifier offering maximum output and controlled dynamics for demanding setups.  
  • Description: Uses top-grade power components and advanced damping control to deliver groundbreaking, crisp and high-energy performance with exceptional stability. In contrast to the Bia 200 Select, its elevated wattage and refined design provide superior technical precision.
Website author headshot
Julian Shapiro
ExtremeHiFi Writer

Used

Zesto Audiox

Every month, we find the brand's used items for sale across the web and offline hifi stores.  We have the largest database of used hifi products. Search it here.

No items found.

Search hifi products

Explore our database of 10,000+ new and 25,000+ used hifi products.

Similar

Amplifiers

brands

Known For
Amplifiers
/
Class: Tube
Average Price
$10,001-$20,000
Used Products
91
 Available
Brand Popularity
76
 of 900+
Headquarters
United States

About the brand

Conrad-Johnson is a hifi brand known for tube amplifiers that create emotionally engaging experiences through their use of KT120 output tubes, CJD Teflon capacitors, and proprietary wide-bandwidth output transformers. Their preamps, like the PV11 and GAT Series 2, stand out for their lack of negative feedback and use of Teflon capacitors with gold-plated silver contacts, contributing to their ability to follow subtle tempo changes and deliver refined sound.

Our interview with the brand

What are two key technological innovations or strong opinions that differ you from other brands?

What's your approach to customer support?

What are your favorite tracks for showcasing the strength of your products?

What other products pair best with yours?

Website author headshot
Julian Shapiro
ExtremeHiFi
Brand Page
Known For
Amplifiers
/
Class: Tube
Average Price
$10,001-$20,000
Used Products
9
 Available
Brand Popularity
363
 of 900+
Headquarters
United States

About the brand

Western Electric, one of the original developers of the 300B vacuum tube since 1938, stands out for their 91E Integrated Amplifier that delivers 20 watts per channel through their patented Steered Constant Current Source technology—significantly more power than typical single-ended triode amplifiers using 300B tubes. The brand's revival and continued production of the 300B tube have earned praise in the audiophile community, with their approach focusing on preserving classic tube sound while adding modern technological improvements.

Our interview with the brand

What are two key technological innovations or strong opinions that differ you from other brands?

What's your approach to customer support?

What are your favorite tracks for showcasing the strength of your products?

What other products pair best with yours?

Website author headshot
Julian Shapiro
ExtremeHiFi
Brand Page
Known For
Amplifiers
/
Class: Tube
Average Price
$10,001-$20,000
Used Products
4
 Available
Brand Popularity
187
 of 900+
Headquarters
United States

About the brand

ampandsound specializes in high-end, handcrafted tube amplifiers made in the USA. Their low-wattage amps pair perfectly with high-efficiency speakers and headphones. The company is known for classic, minimalist designs and a focus on delivering natural sound.

Our interview with the brand

What are two key technological innovations or strong opinions that differ you from other brands?

What's your approach to customer support?

What are your favorite tracks for showcasing the strength of your products?

What other products pair best with yours?

Website author headshot
Julian Shapiro
ExtremeHiFi
Brand Page
Known For
Amplifiers
/
Class: Tube
Average Price
$10,001-$20,000
Used Products
35
 Available
Brand Popularity
130
 of 900+
Headquarters
United States

About the brand

VTL pioneered high-power tube amplifiers and was among the first to put 500 and 1000-watt monoblocks into continuous production, with their amplifiers featuring proprietary Auto Bias technology that continuously monitors tube performance. Their amplifiers are distinctive for allowing users to switch between tetrode and triode modes, while maintaining a simpler design philosophy that uses fewer components for purer sound.

Our interview with the brand

What are two key technological innovations or strong opinions that differ you from other brands?

What's your approach to customer support?

What are your favorite tracks for showcasing the strength of your products?

What other products pair best with yours?

Website author headshot
Julian Shapiro
ExtremeHiFi
Brand Page
Known For
Amplifiers
/
Class: Tube
Average Price
$10,001-$20,000
Used Products
2
 Available
Brand Popularity
406
 of 900+
Headquarters
United States

About the brand

Doshi Audio is a boutique American hifi brand known for its unique use of step-down transformers in phono stages, which provide galvanic isolation and enable zero-feedback tube circuits. The brand stands out for its three-stage decoupling chassis design with stainless steel and Corian, plus its use of common, non-esoteric tubes for reliability and accessibility.

Our interview with the brand

What are two key technological innovations or strong opinions that differ you from other brands?

What's your approach to customer support?

What are your favorite tracks for showcasing the strength of your products?

What other products pair best with yours?

Website author headshot
Julian Shapiro
ExtremeHiFi
Brand Page
Known For
Amplifiers
/
Class: Tube
Average Price
$10,001-$20,000
Used Products
53
 Available
Brand Popularity
125
 of 900+
Headquarters
United States

About the brand

Balanced Audio Technology (BAT) designs all their components with fully balanced circuits and dual-mono power supplies, which deliver better channel separation and cleaner sound reproduction. BAT's signature approach includes zero global feedback and their Unistage circuit design, which amplifies the signal only once through a short signal path to preserve the original audio characteristics.

Our interview with the brand

What are two key technological innovations or strong opinions that differ you from other brands?

What's your approach to customer support?

What are your favorite tracks for showcasing the strength of your products?

What other products pair best with yours?

Website author headshot
Julian Shapiro
ExtremeHiFi
Brand Page

Questions? Ask their dealers.

All Dealers