AIR TIGHT ATM-300R
The ATM-300R turns its 300B topology into velvety tonal color, pinpoint imaging and surprisingly expansive orchestral scale. Audiophilepure found exceptional timbre, transparent staging and a satisfying bass foundation, while its 9W output delivers expressive first-watt dynamics for efficient loudspeakers. A captivating specialist amplifier for listeners who prize musical intimacy and spatial realism.
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Nicely Roasted
Sound Quality
94/100
Build Quality
50/100
Value for Money
85/100
Pros
Velvety yet faithful instrumental timbre, with colorful strings and woodwinds that avoid exaggeration.
Superb soundstage transparency and image focus, including convincingly rendered recorded ambience around instruments.
Convincing dynamic rise and orchestral scale despite modest power output.
Cons
Its 9W-per-channel output makes careful matching with efficient, benign-load loudspeakers important.
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What Reviewers Are Saying
SOUND QUALITY PERFORMANCE 94/100
Listening reports describe an unusually convincing 300B presentation, combining velvety texture and faithful instrumental color with focused, transparent spatial reproduction. Its modest-rated output did not prevent it from making orchestral music feel forceful and large in the reviewed setup.
Transparency Resolution
93/100
The reviewer identifies “superb soundstage transparency” as a central strength and found the air around a clarinet notably believable. Textures are described as lucid and refined rather than smeared or exaggerated.
Tonal Balance Musicality
95/100
The ATM-300R is praised for velvety textures, remarkable timbre fidelity, and a presentation that delivers the sonic appeal associated with the 300B. Strings and woodwinds were heard as lushly textured and colorful while remaining beautiful and faithful to the instruments.
Dynamics
92/100
Despite its 9W-per-channel rating, the amplifier delivered realistic kettledrum force and a convincing rise in intensity toward an orchestral climax. The reviewer also found it capable of making music sound big, calling its first-watt performance awesome.
Soundstage Imaging
96/100
Spatial performance is a standout: the review specifically praises soundstage transparency and image focus. Recorded ambience around individual instruments was rendered with remarkable believability.
Assessments of Build Quality, Usability, and Overall Propositions.
Build Quality
50/100
The supplied listening reports offer little direct commentary on chassis execution, internal layout, connections, reliability, or long-term durability. Published specifications confirm a substantial 24.5kg valve amplifier with 9W+9W output, but they do not on their own establish a fuller construction verdict.
Value for Money
85/100
At roughly $19,800-$21,975, the ATM-300R occupies a specialist high-end 300B segment. The reviews strongly admire its musical results, but do not directly compare its price with competing amplifiers or make a specific value claim.
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Specifications
- Power Output
- 9W+9W (THD<10%)
- THD below
- 1% (1kHz / 1W / 8Ω)
- Input Sensitivity
- 290mV (9W)
- Dumping Factor
- 7 (1kHz / 1W / 8Ω)
- Frequency Response
- 30Hz】40kHz (−1dB / 1W)
- Dimensions
- 430(W)×275(D)×245(H)mm
- Weight
- 24.5kg
Manufacturer's Description — AIR TIGHT
- Abolishing Vanity and Extracting Musicality
Even now many audiophiles are still longing for 300B direct-heated triode valve. We too, were captivated by the charm of this valve. Our approach is to pull out the full potential of 300B valve’s musical soundstage without any additive coloration. As a result, we could achieve a goal of timbral purity and tonal realism by means of 300B’s idiosyncrasy.
Verified Dealers
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Authorized dealers for AIR TIGHT ATM-300R
- Resolution A/V — in-store — New York City, New York, United States (website)
- Supreme Acoustic Systems — in-store — Las Vegas, Nevada, United States (website)
- The ASOC Gallery of Fine Audio — in-store — Stratford, Ontario, Canada (website)
- Acoustic Sounds — online and in-store — Salina, Kansas, United States (website)
- American Sound — in-store — Richmond Hill, Ontario, Canada (website)
- Ann Arbor Audio Design — in-store — Ann Arbor, Michigan, United States (website)
- Audio Creativ — in-store — Riedenburg, Bayern, Germany (website)
- Audio Sound Music — online and in-store — Paris, Île-de-France, France (website)
- AUDIO-CONSEIL — in-store — Saint-Étienne, Auvergne-Rhône-Alpes, France (website)
- Aural HiFi — online and in-store — Denver, Colorado, United States (website)
and 35 more verified dealers