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Since then, we launched 211 push-pull monaural power amplifier ATM-3211, which has become a turning point for the Airtight brand as well as SET ATM-300R. At an eve of 35 years anniversary as AirTight, we will launch the new 211 single monaural power amplifier ATM-2211.\u003c\/p\u003e \u003cp\u003e\"This time, we decided not to use the overall Negative Feedback (NFB) from the secondary side of the output transformer, but to apply a large amount of NFB from the plate of the 211 output tube to the first stage. This is because the sound penetrating power and the energy feeling are emphasized rather than the so-called characteristic improvement. The operating point of each components of the circuit were designed more strict, and increased the output to 32W. ATM-2211 uses fixed bias method and DC ignition for the filament.\"\u003c\/p\u003e","brand":"Air Tight","offers":[{"title":"Default Title","offer_id":52150202728729,"sku":"91843","price":31799.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0844\/4225\/1545\/files\/91843-9.jpg?v=1790020943"},{"product_id":"air-tight-atm-1s-stereo-tube-power-amplifier","title":"Air Tight ATM-1s Stereo Tube Power Amplifier","description":null,"brand":"Air Tight","offers":[{"title":"Default Title","offer_id":52203466522905,"sku":"92761","price":4499.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0844\/4225\/1545\/files\/92761-6.jpg?v=1784081588"},{"product_id":"air-tight-atm-300r-set-tube-power-amplifier","title":"Air Tight ATM-300R (SET) Tube Power Amplifier","description":null,"brand":"Air Tight","offers":[{"title":"Default Title","offer_id":52296314028313,"sku":"93762","price":14453.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0844\/4225\/1545\/files\/93762-3.jpg?v=1784088733"},{"product_id":"air-tight-atc-3-tube-preamplifier-alps-volume-potentiometer-upgrade","title":"Air Tight ATC-3 Tube Preamplifier; Alps Volume Potentiometer Upgrade","description":"Featuring a tube complement of one 12AX7 and two 12AU7 valves, an SRPP circuit with a reinforced buffer stage, low 200-ohm output impedance, and a rigid anti-vibration chassis, the Air Tight ATC-3 line-stage preamplifier is built for exceptional acoustic purity. Handcrafted in Japan, this preamplifier delivers remarkable signal linearity, fast transient response, and pristine clarity. Its power supply utilizes quick-recovery diodes for stability, allowing line-level sources to retain full dynamic scale, micro-detail, and natural tonal weight.\n\nAudio reviewers praise the ATC-3 for its organic soundstage and non-fatiguing musicality. Critics highlight its ability to render rich, three-dimensional imaging where vocals and instruments hang effortlessly in space. Unlike tube preamps that sacrifice speed for warmth, reviewers note that the ATC-3 achieves a refined balance of sweet, textured mid-frequencies, deep bass control, and transparent top-end detail across all genres.\n\nCombining artisan Japanese engineering with timeless tube design, this preamplifier acts as a transformative centerpiece that seamlessly bridges source components and power amplification. Music lovers desiring an authentic, highly resolving sound that reveals the true heart of every recording will find this preamplifier an invaluable addition to any high-performance system.","brand":"Air Tight","offers":[{"title":"Default Title","offer_id":53127744487705,"sku":"99066","price":4399.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0844\/4225\/1545\/files\/99066-5.jpg?v=1790883181"},{"product_id":"air-tight-atm-1s-tube-power-amplifier","title":"Air Tight ATM-1S Tube Power Amplifier","description":"Delivering 36 Watts per channel into 8 ohms, the Air Tight ATM-1S utilizes a tube complement of four 6CA7\/EL34, two 12AU7, and one 12AX7 valves. Handcrafted in Japan, this stereo tube power amplifier features point-to-point hand wiring, custom Hashimoto output transformers, and a copper-plated chassis. Equipped with user-accessible bias adjustment facilities and dual RCA inputs (front and rear) with individual volume attenuators, it operates smoothly as a standalone power amplifier or a direct-source integrated amp.\n\nReviewers consistently praise the ATM-1S for its extraordinary tonal purity, lush midrange, and natural resolution. Listeners highlight its sublime detail retrieval and articulate bass performance at low volumes, reproducing acoustic instruments and vocals with organic realism. Critics universally laud its artisan Japanese construction and its ability to make complex musical passages feel cohesive, fluid, and engaging.\n\nChoosing an amplifier of this caliber introduces heirloom-quality Japanese engineering and reference tube musicality to your audio setup. Its point-to-point construction ensures long-term reliability, while its onboard volume attenuators allow for a streamlined system setup. For music lovers seeking pure analog warmth and fine resolution, the ATM-1S offers a deeply rewarding performance that effortlessly anchors any high-end audio system.","brand":"Air Tight","offers":[{"title":"Default Title","offer_id":53202277957913,"sku":"99250","price":5488.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0844\/4225\/1545\/files\/99250-4.jpg?v=1793523991"}],"url":"https:\/\/tmraudio.com\/collections\/air-tight.oembed?page=2","provider":"The Music Room","version":"1.0","type":"link"}