Kora TB 140 Integrated Amplifier

$4,269.39 $6,999.00

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The Kora TB 140 Integrated Amplifier embodies the essence of Kora’s acclaimed SquareTube® technology, blending the warmth of tubes with the drive and precision of transistors. Featuring 4 triodes per channel, the SquareTube® stage handles all amplification and signal control, delivering unmatched clarity, phase accuracy, and musical refinement. By using hyper-linear complementary transistors solely for current delivery, the TB 140 achieves a seamless synergy where tubes shape the sound and transistors unleash effortless energy. The result is a dynamic, natural, and highly stable amplifier that reveals hidden detail and musical nuance, even when driving complex speaker loads.

Square Tube Technology

The TB140 introduces listeners to Kora’s Square Tube Technology in its most approachable form, proving that high-end engineering can be both accessible and refined. All of the amplification and signal control happens in the tube stage; the transistors simply supply the current your speakers need without adding their own character, for grip and stability that keeps the music locked in place. This balance of warmth and precision makes the TB140 a standout entry point into Kora’s philosophy, offering a taste of their flagship design approach in a more compact and versatile package. Learn more about Square Tube Technology.

Key Features

SquareTube® Amplification: 4 triodes per channel for pure tube-driven signal control with transistor-backed current delivery.
Phase Accuracy: No phase shifts in low or high frequencies for precise, natural sound reproduction.
Dynamic Energy: Tubes provide smoothness and warmth, while transistors deliver unlimited current and impact.
High Stability: Maintains consistent performance with complex loads, ensuring reliability across demanding speakers.
Natural Musicality: Extracts subtle details and dynamics from any source, offering lifelike soundstage and definition.

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 Dimensions	118 × 420 × 370 mm
Chassis Size Only	,
Unit Weight	9.5 kg
Manufacturer’s Warranty	5 years
Materials	Aluminum and steel
Finish	Mineral grey
Accessories	Power chord, 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	310 VA (2 × 100 W / 4 Ω)
Maximum Power Consumption	210 W (2 × 70 W / 8 Ω)
Internal Power Supply	2 × (± 44 V DC), dual power supply
Power Supply Transformer	300 VA toroidal transformer + 2 × 10 VA auxiliary transformers
Main Filtering	2 × 44,000 µF
High Voltage	+250 V stabilized, ‒165 V stabilized
Input Tube Heater	2 × 12 V DC, regulated and grounded
Output Tube Heating	2 × 12 V AC, isolated regulated voltages
Output Power	2 × 70 W / 8 Ω, 2 × 100 W / 4 Ω
Output Power Distribution	4 complementary highly linear ON SEMI® power transistors (225 W / 15 A each)
Inputs	Phono MM (47 kΩ), 4 × Line Inputs (15 kΩ), Pre-out (2 kΩ)
Sensitivity	Phono MM: 4 mV (RIAA curve), Line: 1 V
Pre-out	After the volume setting
Bandwidth	20 Hz to 20,000 Hz (±1 dB)
Internal Impedance	Output: < 0.08 Ω

Made with care

Great value

Elegant design

Quality materials

This product is crafted with quality materials to ensure durability and performance. Designed with your convenience in mind, it seamlessly fits into your everyday life.

We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.

We are committed to ensuring a positive shopping experience for all our customers. If for any reason you wish to return an item, we invite you to reach out to our team for assistance, and we will evaluate every return request with care and consideration.