Flux Lab Acoustics
Amplifiers
Best Known For
Amplifiers
/
Headphone-Only Amplifier
Used Products
0
 Available
Average Price
$1,001-$2,500
Brand Popularity
801
 of 900+
Products Listed
6
Review Count
6
Founding Year
2009
Headquarters
Ukraine
Flux Lab Acoustics
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What's unique about the brand

Flux Lab Acoustics is a Ukrainian company that designs and builds Class-A headphone amplifiers in Ukraine. Some of its amplifiers use MOSFET circuits and others are dual mono, with each channel kept separate. The fully balanced stacks pair two amplifier units and offer an optional adapter for headphones with a 4-pin XLR plug. The team's experience covers both circuit board and software design, and the company develops each product through lab measurements followed by careful listening. Because the amplifiers can take software updates, owners can get later improvements without replacing the unit.

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
.

Products overview

Every model is a Class-A headphone amplifier built in Ukraine and tuned by measurement and then listening. M-FIELD Class-A Mosfet is the entry, and its MOSFET output gives a thicker, fuller low end. Mentor Fully Balanced Stack pairs two units, so 32 Ohm headphones get up to 33.5W per channel in mono mode, which drives hard-to-drive headphones with more headroom. ATLAS Class-A adds a dual mono DAC and streamer, replacing a separate source.

  • Start here. Choose M-FIELD Class-A Mosfet if you want a first Class-A amplifier on a tight budget with a fuller low end.
  • Sweet spot. Volot Dual Mono Class-A adds a preamp output and a 4 pin XLR headphone jack, so one amp also works as the preamp in your system, with 0.002 percent distortion.
  • All in. ATLAS Class-A is a different kind of top model, priced well above the stacks, and its one DAC chip per channel keeps left and right separate from conversion onward, so you need no outboard source.
Website author headshot
Julian Shapiro
ExtremeHiFi Writer

What reviewers are saying

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Quotes we liked:

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Used

Flux Lab Acoustics

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Known For
Amplifiers
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Headphone-Only Amplifier
Average Price
$1,001-$2,500
Used Products
49
 Available
Brand Popularity
105
 of 900+
Headquarters
Australia

About the brand

Burson Audio is an Australian maker of headphone amplifiers and DACs, based in Melbourne. It builds its own discrete op-amps from matched transistors in place of IC op-amps, and since they are not soldered to the board, owners can swap them to tune the sound. Every product uses the company's Max Current Power Supply, developed in 2017 for low noise. Reviewers hear a warm, punchy house sound. The compact Funk drives both headphones and speakers, and the Soloist Voyager belongs to the flagship Voyager series.

Our interview with the brand

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

Modular, Upgradeable Designs

We believe great gear should evolve with your system. That's why our products feature swappable opamps and power modules — letting users fine-tune performance or upgrade later without buying a whole new unit.

Pushing Class-A to New Heights

All our amplifiers operate in pure Class-A with high idle bias to achieve an effortless, dynamic sound.

What's your approach to customer support?

We love working directly with our customers — it's one of the best parts of being a small, passionate team. Customers can always reach out to us directly or go through their local dealer if they prefer. What to expect:

  • Fast and personal responses
  • Worldwide service centers (AU, EU, US, HK) to keep support convenient
  • Trade-in options for older gear
  • And even tips for mods and tweaks

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

"Vincent" – Sara K (from Are We There Yet): A stunning vocal performance with incredible acoustic detail.

"Don't Know Why" – Norah Jones: Her voice reveals micro-detail and tonal balance instantly.

"Limit to Your Love" – James Blake: Sub-bass extension, dynamics.

What other products pair best with yours?

We've had nearly 20 years of working relationship with Audeze, and our US facility — although it's changed address a few times — has always been close to Audeze's in California. Naturally, we love how Audeze headphones pair with our amps. Their planar designs thrive on the high-current, Class-A power that Burson gear delivers.

Website author headshot
Julian Shapiro
ExtremeHiFi
Brand Page
Known For
Amplifiers
/
Headphone-Only Amplifier
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$501-$1,000
Used Products
89
 Available
Brand Popularity
62
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Headquarters
United States

About the brand

Schiit is where a lot of people buy their first serious headphone amplifier or DAC. The American company, started in a garage in 2010, sells direct, builds everything in the United States, and keeps most of its range under $1,000. Many of its products are modular, with DAC and USB boards that can be swapped for newer ones without replacing the whole unit. The Magni amplifier and Modi DAC are the classic first stack, the Yggdrasil is the flagship DAC, and the company's humorous, plain-spoken voice has built an unusually loyal following.

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
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About the brand

Feliks Audio is a Polish maker of tube headphone amplifiers, hand-built at its own site in Lubliniec. Most of the range is output-transformerless, so the tubes drive the headphones directly, and the circuits are wired point to point with single-crystal copper. Unusually for tube amplifiers, they drive planar magnetic headphones as well as high-impedance dynamic ones while keeping the noise floor low. Owners can swap both power and driver tubes to change the sound, and the range runs from the compact Echo 2 to the 300B-based Envy flagship.

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
/
Headphone-Only Amplifier
Average Price
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Used Products
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 Available
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Headquarters
Slovenia

About the brand

Erzetich is a Slovenian maker of headphone amplifiers and headphones, founded in 2012. Founder Blaž Erzetič studied electronics in his teens and later worked as a musician and studio engineer. The wooden parts are made in a workshop in the Trnovo woods from artificially aged tilia wood, which warms up an industrial, brutalist design. The products use no animal parts and are built so any part can be fixed or replaced. The Perfidus is a compact class-A amplifier with an Alps Blue Velvet volume control, and the Thalia is on our Best Open-Back Headphones list.

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
/
Headphone-Only Amplifier
Average Price
$2,501-$5,000
Used Products
36
 Available
Brand Popularity
102
 of 900+
Headquarters
United States

About the brand

Benchmark is an American maker of DACs, amplifiers and preamplifiers, started by Allen H. Burdick to supply television broadcast facilities. Its electronics are built and tested in Syracuse, New York, and certified for professional and home use. The company's goal is to keep noise and distortion below the threshold of hearing. The AHB2 power amplifier, which carries Burdick's initials, uses a patented THX AAA feed-forward design. The DAC3 B suits systems that already have a preamplifier, the DAC3 L adds remote control and home theater bypass, and the DAC3 HGC builds in a headphone amplifier.

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
/
Headphone-Only Amplifier
Average Price
$500
Used Products
39
 Available
Brand Popularity
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About the brand

Questyle is a Chinese maker of DACs and headphone amplifiers built around Current Mode Amplification, which handles gain and feedback in the current domain before converting the signal to voltage, with the aim of lowering distortion. The products have a functional, professional look and plenty of inputs and outputs to suit different headphones, IEMs and systems. The CMA Fifteen and CMA 18 Master are desktop units, and the M15i, M12i and M15C are small mobile DAC/amps. The NHB 12 is MFi certified and supports Apple Lossless on Apple devices.

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

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