ATM-300R Tube Amplifier By Air Tight

Abolishing Vanity and Extracting Musicality… Experience the legendary musical charms of the genuine WE300B direct-heated valve, renowned for its exceptional sound quality and long-standing reputation, Many audiophiles still yearn for the classic 300B direct-heated triode valve. Recognizing its captivating charm, Air Tight has mastered the art of harnessing the 300B valve’s musical soundstage without any added coloration. This approach achieves unparalleled timbral purity and tonal realism, showcasing the unique qualities of the 300B valve.

• Self-biased Class-A operation at WE-300B output stage,
• 3-stage triode amplification,
• DC-driven heater to reduce noise inherent in a direct-heated valve,
• Bias/current meter to check the optimum operation of the output valve,
• Damping selector control to create one’s favorite sound,
• Second-to-none, custom-selected, electrical components,
• Copper-plated chassis to remove magnetic distortion.

Adventures in hifi audio
“I will make no bones about this particular review it was frustrating but also at the same time uplifting and exciting in equal measure. It was frustrating in so much that I am sure there is more to hear from this wonderful amplifier but sadly I am unable to do that at the current time. However the results I was able to achieve were still breathtakingly good, especially with it hooked up to the Stereo Knight Magnetic Silverstone B&R Reference pre-amplifier, all be it its high output required me to use attenuators to better match to the ATM 300 input.”

http://www.adventuresinhifiaudio.com/04/06/2011/the-airtight-atm300-power-amplifier-mr-miuras-wunderkind/
6moons
“This was handy with Rock and strong electronic bass. The trance/dance beats from the Depeche Mode double single Fragile Tension/Hole To Feed had the power they deserve only with NFB. Undoubtedly my 60wpc solid-state Luxman handled all that much better, reached far lower, had better bass control and differentiation and hence also better timbre. Naturally lovers of 8-watt valve amps know these limitations and learn to live with them as the necessary sacrifice to the 300B.”

https://6moons.com/audioreviews/airtight/airtight_2.html

• 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

Download ATM-300R Catalogue