ATM-3211 Tube Monoblock Amplifiers By Air Tight

In 2001, Air Tight introduced the ATM-211, offering an impressive 22W output power through the SET circuit of the 211 transmission triode valve. Renowned for its unmatched tonal quality, the 211 tube captivated audiophiles. However, enthusiasts have long desired a high output exceeding 100W per channel with the 211 tube. In 2017, after five years of dedicated development and significant investment, Air Tight successfully introduced the mono-block ATM-3211. This amplifier features a skilled push-pull configuration with the 211 tube, delivering an impressive power output.

Air Tight considers the triode to be the fundamental form of every vacuum tube. While some might think triodes are outdated, there remains a dedicated group of enthusiasts who continue to appreciate their unique qualities. Indeed, Air Tight is among those who cherish triodes. Experience the exceptional sonic qualities of 211 Triode tubes… both graceful delicacy in pianissimo and clear, saturation-free performance in fortissimo. Enjoy the unparalleled audio excellence and dynamic range this amplifier provides. Air Tight consistently celebrates the timeless appeal of triode technology.

The ATM-3211 has been meticulously researched for over five years to bring the vivid charm of triode technology to life, even for low-efficiency speakers. This amplifier delivers over 100W through an advanced push-pull circuit, ensuring exceptional audio performance.

Circuit configuration:

• 1st stage: 12AX7 differential circuit
• 2nd stage: 12BH7
• Cathode-follower: 12BH7 parallel
• Class-A Output – 30W
• Class-AB Output – 100W
• Frequency Response: 10Hz～50ｋHz　±１ｄB)
• Massive Tamura’s output transformer is employed
• High / Low Composition Transformer ensures an instantaneous power supply and prevents power interference.

Featuring extremely high-grade capacitors and resistors, a hand-worked 15mm thick aluminum front panel, premium WBT input and speaker terminals, and all wiring and soldering are done by hand.

Highfidelity
“With the tested model we will get an incredibly natural sound, but rather the one that can be heard in the studio, without the interface of the recording medium, i.e. without beautifying and refinement. This is one of the few amplifiers that I would really like to have. That’s why I have to present it with highest distinction, the GOLD Fingerprint.”

https://highfidelity.pl/@main-957&lang=en

• 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

Download ATM-3211 Catalogue