{"product_id":"kora-tb-400-integrated-amplifier","title":"Kora TB 400 Integrated Amplifier","description":"\u003cp\u003eThe Kora TB400 Integrated Amplifier embodies the brand’s philosophy of combining tube warmth with transistor power. The TB400 is, quite simply, the \u003ca title=\"Kora TB 200 Integrated Amplifier Listing\" href=\"\/collections\/kora-high-fidelity\/products\/kora-tb-200-integrated-amplifier\"\u003eTB200’s\u003c\/a\u003e big brother. More filtering, bigger transformers, more transistors.\u003c\/p\u003e\n\u003cp\u003eAt its heart lies the innovative SquareTube® operational amplifier, equipped with four triodes per channel. This unique design ensures that all amplification and signal control functions are handled by the SquareTube®, while complementary hyper-linear power transistors supply the necessary current to drive your speakers without coloring the signal. The result is an amplifier that maintains absolute phase accuracy, delivers extraordinary detail, and achieves natural dynamics with unmatched musicality.\u003c\/p\u003e\n\u003cp\u003eBy eliminating the limitations of traditional output transformers, the TB400 avoids phase shifts, poor coupling, and current restrictions. Its marriage of high-voltage tube smoothness and transistor-driven energy delivers a rich, stable, and precise performance, even under complex load conditions. With the TB400, music is experienced with both refinement and unrestrained power.\u003c\/p\u003e\n\u003ch5\u003eSquare Tube Technology\u003c\/h5\u003e\n\u003cp\u003eThe TB400 features Kora’s exclusive Square Tube Technology: all amplification and signal control happens in the tube stage, while complementary transistors simply supply the current your speakers need, without taking part in amplifying the signal. Kora is explicit that this is not the usual hybrid of a tube preamp feeding a solid-state power amp; it is a tube amplifier assisted by transistors. This design eliminates many of the compromises found in traditional tube or transistor circuits, offering the musicality of tubes with the current delivery to drive demanding speakers. \u003ca href=\"https:\/\/kora.fr\/en\/square-tube-2\/\" rel=\"noopener\" title=\"Learn more about Kora Square Tube Technology\" target=\"_blank\"\u003eLearn more about Square Tube Technology\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch5\u003eKey Features\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquareTube® Technology\u003c\/strong\u003e: Four triodes per channel provide full amplification and signal control for a uniquely musical presentation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTube + Transistor Synergy\u003c\/strong\u003e: Tubes add smoothness while transistors deliver dynamic, unrestrained energy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo Transformer Limitations\u003c\/strong\u003e: Eliminates phase shifts in both low and high frequencies, ensuring accurate reproduction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Voltage \u0026amp; High Current Design\u003c\/strong\u003e: Combines tube voltage capacitance with transistor current for exceptional definition and impact.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExceptional Stability\u003c\/strong\u003e: Remains precise and natural even with demanding or complex speaker loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNatural Dynamics\u003c\/strong\u003e: Extracts subtle detail and spatial accuracy for an engaging, lifelike listening experience.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eThe Listening Room Difference\u003c\/h5\u003e\n\u003cp\u003eWe’re a third-generation family business with a brick-and-mortar showroom in Chestertown, Maryland, and a reputation built on trust, not hype. Whether you’re visiting in person or ordering online, we bring decades of experience, personalized service, and honest guidance to every interaction. We don’t just ship boxes. We help build systems, answer your questions like real humans, and make sure every detail of your setup is right, from the cables to the final connection. Our passion is helping you get the most out of your gear, with support that lasts well beyond the sale.\u003c\/p\u003e\n\u003ch5\u003eSpecifications\u003c\/h5\u003e\n\u003ctable border=\"1\" cellspacing=\"0\" cellpadding=\"6\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth colspan=\"2\"\u003eGeneral Characteristics\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall dimension\u003c\/td\u003e\n\u003ctd\u003e148 × 420 × 450 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChassis size only\u003c\/td\u003e\n\u003ctd\u003e130 × 420 × 420 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnit weight\u003c\/td\u003e\n\u003ctd\u003e27 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer’s warranty\u003c\/td\u003e\n\u003ctd\u003e5 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterials\u003c\/td\u003e\n\u003ctd\u003eAluminum and steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eMineral grey\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccessories\u003c\/td\u003e\n\u003ctd\u003eMetal remote control, power cord, instructions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction \u0026amp; design\u003c\/td\u003e\n\u003ctd\u003eToulouse, Occitania region, France\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"2\"\u003eElectronic Features\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower supply\u003c\/td\u003e\n\u003ctd\u003eIEC 230 V AC socket, +7% ~ -10% (117 V AC on request)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum power input\u003c\/td\u003e\n\u003ctd\u003e2 × 360 W \/ 4Ω : 1010 VA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum power consumption\u003c\/td\u003e\n\u003ctd\u003e2 × 200 W \/ 8Ω : 610 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal power supply\u003c\/td\u003e\n\u003ctd\u003e2 × (± 65 V DC), dual power supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower supply transformer\u003c\/td\u003e\n\u003ctd\u003e2 × 500 VA, auxiliary supply: 5 DC\/DC converters, 2 linear regulators\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMain filtering\u003c\/td\u003e\n\u003ctd\u003e2 × 100 000 μF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHigh voltage\u003c\/td\u003e\n\u003ctd\u003e+300 V stabilised, -200 V stabilised\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput tube heater\u003c\/td\u003e\n\u003ctd\u003e2 × 12 V DC, regulated and grounded voltages\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput tube heating\u003c\/td\u003e\n\u003ctd\u003e2 × 12 V DC, isolated regulated voltages\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput power\u003c\/td\u003e\n\u003ctd\u003e2 × 200 W \/ 8Ω, 2 × 360 W \/ 4Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput power distribution\u003c\/td\u003e\n\u003ctd\u003e20 complementary highly linear power transistors “ON SEMI” (225 W \/ 15 A each)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInputs\u003c\/td\u003e\n\u003ctd\u003e- 4 line inputs, input impedance: 15 kΩ\u003cbr\u003e- RCA connectors\u003cbr\u003e- Input sensitivity: 1 V\u003cbr\u003e- Pre-out, output impedance: 2 kΩ\u003cbr\u003e- Input 4 can be configured as bypass (power amplifier mode)\u003cbr\u003e- Input 4 can also be configured as pre-out after volume control (e.g., external subwoofer)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandwidth\u003c\/td\u003e\n\u003ctd\u003e20 Hz ~ 20 000 Hz, ± 1 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal impedance\u003c\/td\u003e\n\u003ctd\u003eOutput: \u0026lt; 0.08 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Kora High Fidelity","offers":[{"title":"Black","offer_id":67848712159601,"sku":"KORATB400BL","price":12199.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0923\/5215\/1921\/files\/TB200-300x157.jpg?v=1792519097","url":"https:\/\/sliyden.store\/products\/kora-tb-400-integrated-amplifier","provider":"sliyden.store","version":"1.0","type":"link"}