Make an enquiry

Air Tight ATM-300R Power Amplifier

Air Tight ATM-300R Power Amplifier

$31,000.00

Enquiry Submitted!

Thank you for your enquiry! We've received your submission and will review it shortly. We'll get back to you within 24 hours.

Make an Offer

Air Tight ATM-300R Power Amplifier

Air Tight ATM-300R Power Amplifier

$31,000.00
$

Offer Submitted!

Thank you for your offer! We've received your submission and will review it shortly. We'll get back to you within 24 hours.
Air Tight ATM-300R Power Amplifier
Air Tight ATM-300R Power Amplifier
Air Tight ATM-300R Power Amplifier
Air Tight ATM-300R Power Amplifier
Air Tight ATM-300R Power Amplifier
Air Tight ATM-300R Power Amplifier

Air Tight

Country of origin: Japan

Air Tight ATM-300R Power Amplifier
SKU: AIR-ATM-300R
$31,000.00

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

Single-ended triode amplifier delivers pure, uncolored 9W per channel using dual 300B vacuum tubes for sonic purity and emotional realism. Tube-rectified power supply with slow-start protection, point-to-point hand wiring on copper sub-chassis, illuminated bias meters, and per-channel attenuation ensure precise control and operation.

In stock
Model:Air Tight ATM-300R Power Amplifier
Colour:Dark Grey
We accept:
American Express Apple Pay Google Pay Mastercard PayPal Shop Pay Union Pay Visa Zip

Every order ships free to any address in Australia via fully tracked, insured delivery. You’ll receive a tracking link once your order is dispatched so you can follow it the whole way. Estimated delivery is 1-4 business days.

We handle your warranty so you don’t have to. If something isn’t right, simply get in touch and we will coordinate directly with the Australian importer on your behalf. Find out more. click here to lodge a warranty claim.

Whether you’re browsing or already unboxing, Geoff is your friendly hi-fi guide available 7 days a week. From choosing the right system to setting up your new purchase, expert advice is always within reach. Contact Geoff today.

Price is important, but building the right system synergy is equally so. If you’ve found a better price on one of our products or listings, simply get in touch with Geoff. Don’t let price stand in the way of working with HeyNow Hi-Fi to find the right result for your system.
Description

Air Tight ATM-300R

Stereo Power Amplifier (300B valves)

AirTight released the original ATM-300 single-ended power amplifier employing WE300B tubes in 1999. The 300B tube had achieved iconic status because of its clarity and musicality and was appearing in statement amplifiers offered by many of the world’s new wave of innovative amplifier designers. The ATM-300 was immediately well received, becoming well known for its clarity and tightness as well as its bass performance in comparison to other SET designs.

In the book “Illustrated History of High-End Audio” published by “The Absolute Sound”, the ATM-300 was introduced as the model symbolic of the AirTight brand. In 2016, the ATM-300 was completely updated to a limited model, the ‘ATM-300 Anniversary’ celebrating the company’s 30 year history. In 2018, after a period of intensive development, the model was updated again with an uncompromising approach to sonics and the ATM-300R was released. This is designed to be a ‘timeless reference model and the destination of the 300B amplifier’.

AirTight’s design approach has always been to exploit the 300B’s timbral purity, tonal realism and sound staging abilities without allowing any adverse colouration. With the experience of two previous incarnations of the design behind them, AirTight were able to continue to develop and realize the circuit in its ultimate form. Hundreds of hours of component trialling and materials research was completed to create an amplifier with serious long-term reliability and consistency.

The ATM-300R uses traditional point to point wiring and the very best electrolytic capacitors, coupling film capacitors and winding resistors which are mounted on a pure copper sub-chassis board. Seen rarely in amplifiers of any cost, plastic bobbin-less interlaminar transformers are employed for the power transformer and choke coil, made by an orthodox lacquer vacuum impregnation method to minimise vibration so that musical signal modulation is prevented. A slow starter circuit has been employed to protect the 300B’s and 5U4GB rectifying tubes are implemented into this very efficient design.

The ‘R’ in the part number stands for ‘Reference’ and the ATM-300R is often favourably compared to the likes of Kondo, Shindo and other legendary Japanese masterpiece amplifiers. Due to its low power rating, it needs to be matched with an appropriate high efficiency speaker system but once the speaker synergy has been found, you will be rewarded with a magical musical experience that can only be produced by a single ended triode amplifier from the hands of a Japanese master.

Reviews

The Absolute Sound, Dick Olsher, 2020

The Air Tight ATM-300R wowed me with countless hours of listening pleasure. It consistently brought to life the full sonic promise of the 300B, and fully justified its reference appellation. Its performance rests on four major sonic pillars working in synergy: velvety textures, remarkable timbre fidelity, superb soundstage transparency and image focus, and a satisfying bass foundation. It gives me great pleasure to crown the ATM-300R as the new king of low-power amplification. I’ve yet to audition a more musically convincing low-power amplifier at any price point. Simply put: an awesome display of the power of the first watt!

Read Review

Stereophile, Art Dudley, 2019

I also wouldn’t turn down an opportunity to hear it with the Takatsuki output tubes (hint, hint). Even so, based on my experiences with it during the last few weeks, the Air Tight ATM-300R stands alongside… as one of the finest amplifiers I’ve ever heard.

Read Review

Tech Specs

Type

Stereo Power Amplifier

Design

Single Ended Triode

Valves Employed

300B, 5U4GB

Rated Power Output

9W＋9W (THD<10%)

THD below

1% (1kHz / 1W / 8Ω)

Damping Factor

7 (1kHz / 1W / 8Ω)

Frequency Response

30Hz～40kHz (−1dB / 1W)

Dimensions

430mm(W) × 275mm(D) × 245mm(H)

Weight

24.5kg

Customer Reviews

User Reviews

Warranty Information
warranty shield 1 Year Warranty

We care about your experience with HeyNow Hi-Fi, and we’re here to make the warranty process as smooth as possible.

Your warranty is handled directly by the Australian importer. By submitting this form, we’ll coordinate the process for you and keep you updated every step of the way. Important: Shipping fees are not included as part of your warranty coverage.

If your HeyNow Hi-Fi purchase isn’t working as it should, click here to lodge a warranty claim.

Should you have any questions, feel free to contact us https://www.heynowhifi.com.au//pages/contact

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.

Explore the Air Tight Range:

Phono Pre-amplifiers

Cartridges

Turntable Accessories

Power Amplifiers

Pre Amplifiers

Valve Amplifiers

Explore Air Tight

Featured Categories

AMPLIFIERS

Speakers

Turntables

CABLES

WHY CHOOSE HEYNOW HI-FI?

At HeyNow Hi-Fi, it's not just about the gear - it's about how it all comes together. With over 30 years of experience, Geoff provides personalised, expert advice to help you build a system that suits your music, your space, and listening style.

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.

GET IN TOUCH