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Air Tight ATM-3211 211 Reference Mono Block Power Amplifiers (Pair)

Air Tight ATM-3211 211 Reference Mono Block Power Amplifiers (Pair)

$140,000.00

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Air Tight ATM-3211 211 Reference Mono Block Power Amplifiers (Pair)

Air Tight ATM-3211 211 Reference Mono Block Power Amplifiers (Pair)

$140,000.00
$

Offer Submitted!

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Air Tight ATM-3211 211 Reference Mono Block Power Amplifiers (Pair)
Air Tight ATM-3211 211 Reference Mono Block Power Amplifiers (Pair)
Air Tight ATM-3211 211 Reference Mono Block Power Amplifiers (Pair)
Air Tight ATM-3211 211 Reference Mono Block Power Amplifiers (Pair)

Air Tight

Country of origin: Japan

Air Tight ATM-3211 211 Reference Mono Block Power Amplifiers (Pair)
SKU: AIR-ATM-3211
$140,000.00

Includes GST. 🚚 Free shipping on orders over $100 Australia wide at checkout.

A powerful 211 triode push-pull circuit produces an impressive 120 watts of output power. An exceptionally refined, burnished, and elegant sound is delivered through meticulous point-to-point wiring and high-grade components. Lifelike detail in quiet passages and effortless authority during dynamic peaks are achieved.

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Description

At last, unfinished dream came true;

Astounding 120W output from exquisite 211 Triode push-pull circuitry!!

  • In 2001, we Air Tight introduced the ATM-211 that delivers hefty 22W output power by means of SET circuit of the transmission triode valve 211. We all were drunk with the unexcelled charm of overall tonal quality inhering in the
  • 211 tube, while it’s also true that all of tube-sound enthusiasts have been longing for high output exceeding 100W/CH with the 211 therein employed.
  • Now in 2017, our ambitious challenge to let the 211 in skilled push-pull configuration yield such gigantic power output was rewarded in the form of the new mono-block ATM-3211, as a result of unyielding 5 years’ patience with uncompromising spirit and unsparing investment in engineering cost.
  • Please enjoy the outstanding, intrinsic sonic features and characteristics of the Triode 211; both of graceful delicacy in pianissimo and clear saturation-free representation in fortissimo! .
  • We may define that the triode is the primitive form of every vacuum tube. Although people might imagine that the triode is left behind the era, on the other hand still there are some persistent triode lovers.
  • Yes, we, Air Tight are one of such triode lovers. Starting from ATM-300 of 300B and ATM-211 of transmission tube 211 to the latest ATM-300Anniversary of our 30 years anniversary.
  • As greedy as it is, this ATM-3211 has been in research for more than 5 years if such simple and vivid triode charm can be realized even for the low efficiency speakers by means of 100w exceeding push-pull circuit.
  • The circuit configuration is as follow:
    • 1st stage: differential circuit of 12AX7
    • 2nd stage: 12BH7
    • Cathode-follower 12BH7 parallel
    • A-class operation up to 30W
    • AB-class operation for more than 30W
    • Wide frequency range is obtained by NFB circuit (Frequency response 10Hz～50ｋHz　±１ｄB)
    • Massive Tamura’s output transformer is employed
    • High and low 2-compositions transformer ensure instantaneous power supply and prevent power interference.
  • High grade capacitors and resistors are employed for the key locations learned in years’ development.15mm thick aluminum front panel is scraped out by hand workWBT input and speaker terminals are employed.Wiring and soldering are all done by hand.

Specifications

Tech Specs

Valves employed:

12AX7 x 1, 12BH7 x 3, 211 x 2

Rated output:

120W (6Ω/THD2%)

Frequency response:

10Hz~50kHz (±1dB/THD0.06%)(at 1kHZ/30W)

Damping factor:

6(1kHz/1W)

Input sensitivity:

1V/Input impedance 100kΩ

Power consumption:

550VA

Load impedance:

6Ω/16Ω(Interchangeable, 6Ωstandard)

Dimensions:

400(W) x 450(D) x 405(H) mm

Weight:

44kgs
Customer Reviews

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Warranty Information
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Why Choose Air Tight

Air Tight is one of Japan’s most revered valve amplifier manufacturers, renowned for producing beautifully handcrafted amplifiers that combine traditional Japanese craftsmanship with extraordinary musical refinement and engineering integrity. Founded by the late Atsushi Miura after his influential career at Luxman, Air Tight was created around a simple philosophy — build uncompromising valve electronics designed purely for musical realism and emotional engagement.

What makes Air Tight particularly distinctive is the company’s refusal to chase trends or mass production. Every amplifier is assembled in Japan using carefully selected transformers, premium internal components, point-to-point style construction techniques, and highly refined circuit topologies developed through extensive listening and engineering experience. The result is a range of amplifiers that feel timeless both sonically and physically.

At HeyNow Hi-Fi, Air Tight products represent some of the most emotionally captivating amplification available today. There is a naturalness, tonal beauty, and dimensional realism to the presentation that allows music to feel remarkably human and physically present within the listening space.

Signature Design and Sound

Manufactured entirely in Japan, Air Tight amplifiers are engineered around highly refined valve circuits and exceptional transformer design, with enormous attention paid to component quality, power supply stability, and signal purity. Unlike many modern products designed around specification targets or visual spectacle, Air Tight amplifiers are fundamentally voiced through long-term listening and musical coherence.

One of the defining characteristics of Air Tight amplifiers is their remarkable harmonic texture and spatial realism. Instruments and vocals are reproduced with convincing body, tonal density, and a highly holographic sense of dimensionality. Rather than sounding soft or overly romantic, Air Tight products balance warmth and refinement with excellent transient delicacy, low-level detail retrieval, and natural dynamic flow.

The company’s output transformer design plays a major role in this presentation. Air Tight transformers are exceptionally refined and contribute significantly to the amplifier’s sense of openness, tonal purity, and effortless musical communication. Combined with carefully implemented valve stages and substantial power supply engineering, the result is a sound that feels fluid, spacious, and deeply engaging without becoming overly coloured or slow.

Air Tight also remains highly respected for preserving the individuality of different valve types throughout the range. Whether using EL34, KT88, 300B, or other classic tube platforms, each amplifier maintains its own distinct musical character while still carrying the unmistakable Air Tight refinement and coherence.

Air Tight Product Range

The Air Tight range available through HeyNow Hi-Fi includes integrated amplifiers, stereo power amplifiers, mono amplifiers, phono stages, preamplifiers, and reference-level valve electronics designed for serious analogue and high-end music systems.

Products throughout the range maintain a strong focus on handcrafted Japanese construction, premium transformer implementation, and preserving the emotional communication within music rather than simply pursuing technical measurement performance.

At HeyNow Hi-Fi, Geoff and his experienced analogue and valve-audio setup team provide assistance with tube amplifier matching, speaker pairing, analogue integration, and complete system optimisation to ensure Air Tight products perform at their extraordinary full potential within each customer’s listening environment.

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Whether you're starting from scratch, refining your set up, or upgrading your gear, Geoff is always happy to have a chat. Call or book a private consultation directly with Geoff today.

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