The Kora TB 200 Integrated Amplifier embodies the essence of the Kora amplifier range, powered by the revolutionary Square Tube® operational amplifier. With four triodes per channel, this unique design delivers remarkable musical qualities, seamlessly blending tube smoothness with transistor-driven power. Unlike traditional output transformers, the Square Tube® and transistor combination ensures absolute phase accuracy, extended frequency response, and limitless current delivery. The result is an amplifier that reveals stunning detail, natural dynamics, and effortless energy, even when driving complex loudspeakers. Square Tube Technology In the TB200, Kora applies its patented Square Tube Technology to deliver musical truth with both finesse and authority. The design begins with tube stages that set the tonal character, adding natural texture and harmonic depth, then passes to a solid-state section that ensures control, dynamics, and long-term stability. This combination makes the TB200 equally capable of handling delicate passages and explosive peaks, creating a listening experience that feels both intimate and powerful. Learn more about Square Tube Technology. Key Features Square Tube® Technology – Proprietary operational amplifier with 4 triodes per channel for unparalleled musicality. Hybrid Design – Tubes provide warmth and smoothness, while transistors deliver raw current and dynamic power. No Transformer Limitations – Eliminates phase shifts, poor coupling, and current restrictions associated with traditional designs. High Definition Power – Combines high-voltage tube amplification with high-current transistor drive for exceptional clarity and control. Phase Accuracy – Maintains precision across the frequency spectrum, extracting fine detail and natural dynamics. Load Stability – Designed to remain stable and reliable, even with complex and demanding speaker loads. The Listening Room Difference We’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. Specifications General Characteristics Overall dimension 148 x 420 x 350 mm Chassis size only 130 x 420 x 320 mm Unit weight 19 kg Manufacturer's warranty 5 years Materials Aluminium and steel Finish Mineral grey Accessories Metal remote control, power cord, instructions Construction & design Toulouse, Occitania region, France Electronic Features Power supply IEC 230 V AC socket, +7% ~ -10% (117 V AC on request) Maximum power input 610 VA (2 x 180 W / 4Ω) Maximum power consumption 310 W (2 x 100 W / 8Ω) Internal power supply 2 x (+ 50 V DC), dual power supply Power supply transformer 2 x 300 VA Main filtering 2 x 60,000 µF High voltage +300 V stabilised, -200 V stabilised Input tube heater 2 x 12 V DC (regulated & grounded voltages) Output tube heating 2 x 12 V DC (isolated regulated voltages) Output power 2 x 100 W / 8Ω2 x 180 W / 4Ω Output power distribution 12 complementary highly linear power transistors “ON SEMI” (225 W / 15 A each) Inputs 4 line inputs, input impedance: 15 kΩ (RCA connectors)Input sensitivity: 1 VPre-out, output impedance: 2 kΩInput 4 can be configured as a bypass (power amp mode) or as a pre-out to drive an external active subwoofer. Bandwidth 20 Hz ~ 20,000 Hz (±1 dB) Internal impedance Output: < 0.08Ω
