AIR TIGHT

Air Tight
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Progressive tube technology for the ultimate in digital performance capability!

 

Air Tight's Reference line

ATM 3211 - Reference mono power amplifier


Airtight's dream came true in 2017 with their 120W output from exquisite 211 Triode push-pull circuitry.

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 in key locations.
- The 15mm thick aluminum front panel is carved by hand.
- WBT input and speaker terminals are employed.
- Wiring and soldering are all done by hand.

Specifications:

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

Downloads

Airtight's PDF specification



ATM-2001/ATM-2001S


Superdreadnought mono power amplifier / stereo power amplifier

Features

- Comfortable high power thanks to colossal output stage featuring 12 pieces of 6550 beam valve
- Individually direct-coupled cathode-follower to ensure an optimum operation of each output valve
- Massive power supply employing huge EI power transformer
- 2 independent amps thus composed in UL configuration afford rich high power without load on each component
- Lavish employment of strictly select components of high performance & long durability

Specifications

Valves employed: 6550 × 12, 12BH7× 6, 12AX7× 2, 12AU7 × 2
Rated output: 338W(8 ohms, mono) / 180W(8 ohms,stereo)
THD: less than 1% at rated output
Frequency response: 20 - 20,000Hz( 1dB)
Input impedance: 100k ohms
S/N ratio: 100dB
Dimensions:
power supply: 430(W) ×185(H) ×500(D)mm
amplifier: 430(W) ×380(H) ×520(D)mm
Weight:
power supply: 65kgs
amplifier: 50kgs



ATM-3011R


reference mono power amplifier

Features

- Parallel Connection of KT120 Valves under UL connection operated are 12pcs. of the reputed high-power valve compatible to the KT88.
- Driving Circuitry Featuring Direct-Coupled Cathode Follower
- Output valves can be easily adjusted by the front bias meter and the alignment pot affixed to each valve
- Banishment of PCB
- The amp section, all the components are placed on the copper-plated steel plate in order to improve heat conduction, to prevent vibration and shield magnetism
- Strictly Select Components
- Dispositions of components are so designed as to effect heat dissipation by natural air circulation, thus ensuring noise suppression to achieve good S/N ratio
- Upright compact chassis

Specifications

Valves employed: KT120x12, 12BH7× 3, 12AX7× 1, 12AU7 × 1
Rated output: 200W (mono)
THD: less than 1% at rated output
Frequency response: 20 - 20,000Hz( 1dB)
Load impedance: 8 ohms
Input impedance: 100k ohms
S/N ratio: 100dB
Power consumption: 300W
Dimensions: 210(W) 520(H) ×565(D)mm
Weight: 46kgs



ATM-300R


stereo power amplifier

Specifications

Power Output : 9W+9W (THD<10%) THD below : 1% (1kHz / 1W / 8Ω) Input Sensitivity : 290mV (9W) Damping Factor : 7 (1kHz / 1W / 8Ω) Frequency Response : 30Hz~40kHz (−1dB / 1W) Dimensions : 430(W)×275(D)×245(H)mm Weight : 24.5kg

  • » Single Ended Triode Power Amplifcations
  • Air Tight's Single-Ended Triode Power Amplifiers

    ATM-300 30th Anniversary Version


    stereo power amplifier

    In order to upgrade so-called “nostalgic” vacuum tube sound to that of contemporary nature, on their 30th anniversary, Air Tight introduced their new power amplifier utilizing the second-to-none TA300B triode employing their time-tested valve configuration technologies.

    On top of the traditional circuitry, luxury components are lavishly employed even in tiny capacitors and resistors, not to speak of laser-cut sub-chassis made of thick pure copper. Naturally special care is paid to non-resonant structure composed of heavy, robust chassis, and indeed, none of the screw heads is made visible at a glance on the surface, which offers perfect integrated feelings of ultimate refined, beauty and ultra high-precision sonic instruments.

    Specifications

    Power Output: 9 W+ 9W (THD 5 %)
    Valves employed: 300B × 2, 5U4GB ×1, 12BH7A × 2, 12AU7A(ECC82) × 2
    THD: below 1 % (1 kHz/ 1 W/ 8 Ω)
    Input Sensitivity: 290mV ( 9 W/8 Ω)
    Damping Factor: 7 ( 1 kHz/ 1 W/ 8 Ω)
    Frequency Response: 25Hz~40kHz (-1 dB/1 W)
    Dimensions: 430(W)×275(D)×245(H)mm
    Weight: 24kg



    ATM-300


    stereo power amplifier

    Features

    - Legendary musical charms of jubilee-long reputed, genuine 300B diect-heated valve
    - Self-biased Class-A operation at 300B output stage
    - 3-stage triode amplification for sublimate musicality
    - DC-driven heater to reduce noise inherent in direct-heated valve
    - Bias/current meter to check optimum operation of output valve
    - Damping selector control to create one’s favourite sound
    - Lavish employment of second-to-none, custom-selected components
    - Copper-plated chassis to remove magnetic distortion
    - Attenuator on direct-CD input

    Specifications

    Valves employed: 300B × 2, 5U4GB ×1, 12BH7A × 2, 12AU7A(ECC82) × 2
    Rated output: 8W + 8W (8 ohms)
    THD: less than 1% (6W)
    Input sensitivity: 230, 300, 450mV
    Damping factor: 0, 4, 6dB adjustable
    Dimensions: 430(W) × 275(D) × 245(H)mm
    Weight: 24kgs



    ATM-211


    monaural power amplifier

    Features

    - Unprecedented high power 22W derived from broadcast-oriented 211 valve with direct-coupled cathode-follower stage
    - All-stage triode-driven non-NF Class-A operation to achieve pure,unimpaired sound
    - Independently coiled transformer for amp-stage, bias, heater & relay circuits to remove mutual interferences
    - DC-driven heater filament to eliminate hum of output valve
    - Relay-activated muting circuit for long life of electrolytic capacitor
    - Bias meter to check operation status of output valve

    Specifications

    Valves employed: 211 × 1, 12AX7 × 1, 12BH7A × 1
    Rated output: 22W (8 ohms)
    Frequency response: 20 — 20kHz (1dB, 22W)
    Input impedance: 100kohms
    Dimensions: 390(W) × 360(D) × 260(H)mm
    Weight: 26kgs



  • » Power Amplification


  • Air Tight Power Amplifcation

    ATM-4


    stereo power amplifier

    Features

    - Reputed 6L6GC beam-valve boasting of long history starting from military application
    - UL connection enabling to offer affluent power and guts
    - Low NF design for low distortion
    - Stereo/mono selector switch
    - Components selected for long-time listening pleasure

    Specifications

    Valves employed: 6L6GC × 4, 6FQ7 × 2, 12AT7 × 1
    Rated output: 24W + 24W (8 ohms), 48W (mono, 8 ohms)
    Input impedance: 100kohms
    Features: input selector (2-ch), stereo/mono selector
    Dimensions: 380(W) × 340(D) × 205(H)mm
    Weight: 23kgs



    ATM-3


    monaural power amplifier

    Features

    - 6CA7 output valves for high reliability and affluent musicality under triple push-pull configuration
    - Selector between UL and TRIODE modes enabling to match the amp operation to type of speaker used, or the sound to your personal taste
    - Bias adjustment enabling each and all valves to exhibit the same operational performance
    - Removal of PCB’s for vivid, natural sonic reproduction
    - Large power transformer with heavy-duty choke coil and reputed Tamura output transformer
    - Muting delay system to protect output valves

    Specifications

    Valves employed: 6CA7 × 6, 12AX7 × 1, 12AU7 × 1
    Rated output: 110W (UL), 55W(triode)
    Input impedance: 100kohms
    Features: UL/triode mode selector, bias adjuster
    Dimensions: 405(W) × 340(D) × 220(H)mm
    Weight: 25kgs



  • » Pre-Amplifcation
  • Air Tight Pre Amplifiers

    ATE-2


    phono equalizer amplifier

    Features

    - Genuine valve configuration for whole amp stages even at power supply
    - Latest sonic-oriented high-quality attenuator for matchless sonic transparency and silky smoothness
    - EQ circuitry composed of 2-stage NF & SRPP to insure wide-band spectrum and minimum distortion
    - Elaborate power supply for high stability and low noise
    - Direct-accessible EQ output bypassing volume pot
    - High-mass, vibration-proof chassis for high rigidity

    Specifications

    Valves employed: 12AX7(ECC83) × 3, 12BH7A × 1, EF86(6267) × 1, 6922 × 2, 6X4(EZ90) × 1
    Phono input: 2 channels
    Line input: 1 channel
    Mode: stereo/mono selector
    EQ output: direct/buffered (2 channels)
    Dimensions: 405(W) × 330(D) × 145(H)mm
    Weight: 12kgs



    ATC-5


    stereo line & phono control amplifier

    Specifications

    Valves employed: 12AX7 × 3, 12AT7 × 2
    Phono equalizer input: RCA/MM × 2
    Input impedance: 47kΩ(Gain 40dB)
    Phono equalizer output: RCA × 1
    Output impedance: Recommended load more than 47kΩ
    Line input: RCA × 3
    Input impedance: 47kΩ (Gain 18dB)
    Line output: RCA × 2
    Output impedance: Recommended load more than 47kΩ
    Output voltage: 20V(Load 100kΩ/1% distortion)
    Line amplifier distortion: THD 0.02%(1V/1kHz)
    Frequency response Phono equalizer: 50Hz~20kHz(±0.2dB) /20Hz-2.5dB
    Frequency response Line amplifier: 20Hz~100kHz-1dB
    Power consumption: 50VA
    Dimensions: 400(W) × 260(D) × 90(H)(tentative)
    Weight: 9kgs(tentative)



    ATC-3


    stereo line-control amplifier

    Features

    - SRPP line amp with reinforced buffer stage to assure good noise rejection, low output impedance and extended linearity
    - Rich power supply featuring quick recovery diode for high operational speed and low pulse noise
    - Single-steel sheet with multi-layer enamel for high rigidity and low noise
    - High-quality input/output jacks with detachable mains cord
    - Optional ‘Alps’ high-precision pot RK-501

    Specifications

    Valves employed: 12AX7(ECC83) × 1, 12AU7(ECC82) × 2
    Output voltage: rated 2V, max. 15V
    Output impedance: 200 ohms
    THD: less than 0.01%
    Input sensitivity: 110mV (ouput 1V)
    S/N ratio: less than 90dB (IHF-A weighted)
    Dimensions: 430(W) × 325(D) × 90(H)mm
    Weight: 8kgs



    ATC-1


    stereo line & phono control amplifier

    Features

    - Highly reliable 12AX7 valves meticulously selected after ageing
    - 3-stage low-impedance K-K NF configuration equaliZer acclaimed for low distortion & wide frequency response
    - Simple, single-stage flat amp for pure sound
    - High-voltage B-power supply with quick recovery diode
    - PCB-free hand wiring
    - Discrete, highly rigid dia-magnetic chassis
    - EL-core power transformer

    Specifications

    Valves employed: 12AX7(ECC83) × 5
    Output voltage: rated 2V, max. 15V
    Output impedance: 600 ohms (pre-out, EQ-out)
    THD: 0.05% (phono), 0.02% (line)
    Input sensitivity: phono; 1.8mV(output 1V), line; 150mV (output 1V)
    S/N ratio: less than 85dB (phono) & 98dB(line)
    Dimensions: 430(W) × 325(D) × 90(H)mm
    Weight: 7kgs



  • » OTHER
  • Other Air Tight Electronics

    ATH-3


    step-up transformer for MC cartridge

    Specifications

    Step-up ratio: 1:40 (32dB gain) at low impedance mode
    Adaptable impedance of cartridges: 1Ω〜7Ω (Recommended)
    > > >The adaptable impedance range can be converted to 7Ω〜40Ω.

    Dimensions: 144 (W) × 207 (D) × 80 (H) mm
    Weight: 1.5kgs



    ATH-2 REFERENCE


    step-up transformer for MC cartridge

    The ATH-2 REFERENCE is Air Tights top version of the ATH-2A. The ATH-2 REFERENCE has three selectable inputs, i.e., "Bypass", "2Ohm" and "40Ohhm". Thanks to the employment of the new winding material (oxygen-free copper) and careful review on its winding method, the dynamics-range, sonic powerfulness and quality have been remarkably improved, thus achieving an unparalleled musicality of your analogue discs.

    Features

    - frequency rage being fully procured, the upper-end is extend up to 80kHz (-1dB) and 120kHz (-2.2dB).
    - S/N ratio especially at the low output level totally surpassing the competitors' performance, you may enjoy the higher quality in the different dimension in combination with the Hi-End amplifiers
    - 2 Ohm position complies with the latest ultra-low impedance below 1 Ohm

    The ATH-2 REFERENCE derives the full potentials of the existing MC cartridges, starting from the Ortofon SPU down to the latest

    Specifications

    Input Selector - 3 position
    ・Bypass: without gain, for MM cartridges
    ・2Ω (0.6Ω~7Ωapplicable) gain 29dB 
    ・40Ω (7Ω~40Ω applicable) gain 23dB
    Frequency response: 10Hz~80kHz (-1dB)
    Dimensions: 240(W)×180(D)×70(H)mm
    Weight: 2.8kgs



    ATH-2A


    step-up transformer for MC cartridge

    Features

    - Input selector for 3 different cartridges/tonearms
    - Input impedance selective among 3 positions [2 ohms, 40 ohms & bypass (for MM cartridge)]

    Specifications

    Input: 3 channels
    Impedance: 3-step selectable (2 ohms, 40 ohms& bypass)
    Frequency response: 15 - 50,000Hz (-1dB)
    Dimensions: 240(W) x 180(D) x 70(H)mm
    Weight: 2.8kgs



  • » CARTRIDGES

  • Phono Cartridges from Air Tight

    Opus-1 MC Phono Cartridge

    Features

    - 3-dimensional soundstage imaging
    - Unprecedented, sublime sonic balance achieved thru years-long research seeking for optimum combination ratio in internal impedance and output voltage
    - Exclusive, renowned SH-uX core sealed in ultra-hard duralumin housing fortified by nickel plating

    Specifications

    Type: Ultra Low Impedance MC phono cartridge
    Frequency range: 10-50,000Hz
    Internal impedance:   1.4 ohms (DCR)
    Output voltage:  0.45mV/1kHz
    Magnet: Neodymium#50
    Tracking force: 2.0-2.2g
    Dynamic Compliance: 8x10⁻⁶Cm/Dyne
    Cantilever:  Boron Cantilever
    Stylus Tip Type: Semi-line contact (3μmm×30μmm)
    Channel balance: Less than 0.5dB/1kHz
    Cross talk: More than 30dB/1kHz
    Cartridge base: A7075(DLC plating)
    Housing: A5056(Rhodium plating)
    Terminal: Rhodium plating
    Weight: 12.5g



    PC-1 Supreme Ultimate MC phono cartridge

    Features

    - Epoch-making Hi-µ core material SH-µX recently developed offers high µ amount to realise high-efficiency magnetic circuitry
    - Thick wires help reduce winding Nos. in coil, thus achieving astounding low internal impedance
    - Expanded bandwidth & extended dynamic range present clearer life-like soundstage
    - Improved transient & phase characteristics reproduces ultra-heavy bass with highest resolutions

    Specifications

    Internal impedance: 1 ohm (DCR)
    Output voltage: 0.4mV/1kHz
    Stylus pressure: 1.9 - 2.2g
    Channel balance: within 0.5dB/1kHz
    Dynamic Compliance: 8x10⁻⁶Cm/Dyne
    Cantilever: boron
    Weight: 12g



    PC-1 coda MC phono cartridge

    Specifications

    Internal impedance: 1.7 ohms (DCR)
    Output voltage: 0.5mV/1kHz
    Stylus pressure: 2.0 - 2.2g
    Channel balance: within 0.5dB/1kHz
    Cantilever: boron
    Stylus Tip Type: Semi-line contact (3 μ mm × 30 μ mm)
    Cartridge base: A7075 (Extra Super Duralumin)
    Housing: A6063
    Terminal: Rhodium plating
    Weight: 12.7g



    PC-7 MC phono cartridge

    Specifications

    Cantilever: Boron
    Stylus Type: Microridge
    Internal impedance: 7 ohms (DCR)
    Output voltage: 0.6mV/1kHz
    Stylus pressure: 1.9 - 2.2g
    Channel balance: within 0.5dB/1kHz
    Weight: 9.6g



  • » LOUDSPEAKERS

  • LOUDSPEAKER FROM AIR TIGHT

    AL-05



    compact music monitor

    Specifications

    Configuration: 4 inch full range driver
    Load impedance: 4 ohms
    Power handling 25W ( Max 40W )
    Frequency response: 70 - 20,000Hz ( -10dB )
    Dimensions: 170(W) x 270(H) x 220(D)mm
    Weight: 5.0kgs



  • » REVIEWS

  • Reviews

    - Image hifi magazine: AIRTIGHT Opus-1, Opus-1 MC phono cartridge was reviewed by Image hifi magazine (Feb, 2018 edition)
    - 2017 Buyer's Guide : Power Amplifiers $10,000-$15,000, The Absolute Sound
    - Stereophile: AIRTIGHT ATM-3011 (http://www.stereophile.com/content/return-franco-serblin)
    - http://www.avfline.com/bbs1/read.php?tid=2725
    - HIGH Fidelity: AIRTIGHT ATM-300 (http://www.highfidelity.pl/)
    - 6moons audio reviews: Air Tight ATM-300
    (http://www.6moons.com/audioreviews/airtight/airtight.html)
    (http://www.6moons.com/audioreviews/airtight/airtight_3.html)
    - Stereophile: Air Tight ATM-211 tube monoblock power amplifier
    (http://stereophile.com/tubepoweramps/687/)
    - HIGH Fidelity: AIRTIGHT ATM-211 (http://www.highfidelity.pl/)
    - SoundClub - Air Tight (http://www.soundclub.pl/producenci/Air_Tight/33.html)
    - air tight 211 (http://www.positive-feedback.com/Issue22/airtight_211.htm)
    - Air Tight ATC-2 ATM-300 by Jean Giguére Magazine Son & Image
    (http://www.quinceton.com/airtight/reviews/SonImage.htm )
    (http://www.quinceton.com/airtight/reviews/SonImage2006.pdf (French))
    - Cine now: ATM-1s(CES2010)
    (http://www.cinenow.co.uk/videos/2341-air-tight-founder-mr-atasushi-miura-presents-the-atm-1s-ces-2010)
    - Air Tight ATC-1 Preamp and ATM-1 Power Amp Reviewed
    (http://www.hometheaterreview.com/air-tight-atc-1-preamp-and-atm-1-power-amp- reviewed/)
    - Test przedwzmacniacza Air Tight ATC-3 - Artykuły audio. Testy ... (Portuguese)
    (http://www.audiostereo.pl/Test_przedwzmacniacza_Air_Tight_ATC_3_47302.html)
    - HIGH Fidelity:AIR TIGHT ATC-3+ATM-1S
    (http://www.highfidelity.pl/!ev/artykuly/18_08_2008/air.html)
    (http://www.highfidelity.pl/artykuly/0808/air.html(Polish))
    - HIGH Fidelity: Air Tight PC-1 Supreme
    (http://www.highfidelity.pl/)
    - Question on Air Tight PC-1 Supreme for Mr. Valin | AVguide
    (http://www.avguide.com/forums/question-air-tight-pc-1-supreme-mr-valin)
    - awards 2008:Air Tight PC-1 Supreme
    (http://www.positive-feedback.com/Issue40/awards_2008.htm)
    - The Abso!ute Sound:Air Tight PC-1 Cartridge | AVguide (http://www.avguide.com/review/air-tight-pc-1-cartridge )
    - Air Tight PC-1 Cartridge Reviewed (http://www.hometheaterreview.com/air-tight-pc-1-cartridge-reviewed/ )
    - TRANSROTOR Argos + AIR TIGHT PC-1 - (http://www.highfidelity.pl/)
    - BERGMANN AUDIO SINDRE + AIR TIGHT PC-1 - Turntable - High Fidelity (http://www.highfidelity.pl/)


  • » OTHER

  • RK-501


    High-precision volume

    Features

    A unique polished solid brass enclosure resistant to vibration and resonance with a newly developed carbon resistor offers unsurpassed sonic transparency and silky-smooth touch to level control. Available at option for the ATC-1, ATC-2, ATC3


  • » Back to Reference Line

  • IMPORTANT: Products and specifications are subject to change without notice.