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Kora TB140

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Description

Description Freakuence!
The Kora TB140 immediately stands out for its quirky design. A square tube amp. Here it is not hunted for trends, but for character.
Retail price: 5650.00
General description
This integrated amplifier system uses the Square Tube® circuit, which employs four triodes per channel. This innovative configuration provides complete signal amplification. The output voltage of the Square Tube® circuit is applied directly to the speaker terminals. Audio power transistors, which are exceptionally linear, provide only impedance matching and deliver the necessary current to the speakers without further amplifying the signal. This approach eliminates problems common to traditional output transformers, such as phase shifts in both low and high frequencies, poor low-frequency behavior and current limitations. The chassis is made entirely of aluminum and steel and finished in mineral gray. The front panel features an acrylic panel over three-quarters of the top section, with a recessed rotary knob on the right side for menu navigation. The system features four line inputs and one phono MM input, with an input impedance of 47 kΩ for the phono input and 15 kΩ for the line inputs. Output power is 2 x 70 W at 8 Ω and 2 x 100 W at 4 Ω. The bandwidth runs from 20 Hz to 20 kHz with a ±1 dB deviation. The system weighs 9.5 kg and has dimensions of 118 x 420 x 370 mm.
Specifications Kora TB140
Power: 2 x 70 W at 8 Ω; 2 x 100 W at 4 Ω Inputs: 4 analog RCA inputs 1 MM phono input Outputs: 1 pre-out 1 pair of loudspeaker outputs Dimensions (W x H x D): 420 x 100 x 340 mm Weight: 9.5 kg Power supply: IEC connector, 230 V AC (+7% / -10%) Maximum power consumption: 310 VA (2 x 100 W / 4 Ω); 210 W (2 x 70 W / 8 Ω) Internal power supply: 2 x (±44 V DC), dual power supply Transformer: 300 VA toroidal transformer High voltage: +280 V stabilized, -180 V stabilized Tubes: 4 triodes per channel Enclosure: Aluminum and steel Color: Mineral gray
Background information
The Kora TB140 was designed in Toulouse by engineer Bruno Ginouvès, with a focus on natural sound and musical experience. The amplifier uses the hybrid “Square Tube” topology, a unique configuration with a tube preamp and a transistor output stage. High-quality cabling is used internally, with short signal paths for minimal distortion. The cabinet is sturdy and beautifully finished, largely with parts from Europe.
Brand history
Kora was founded in 1990 in Portet-sur-Garonne, near Toulouse, France. Initially, the company produced power supplies and signal processing circuits for the aerospace industry. Later, Kora began offering amplifier kits and in 1994 introduced their first high-fidelity amplifier, the Design 30. In 2018, Kora reintroduced itself with the development of the patented “Square Tube” technology, a new approach to tube amplification. All Kora products are completely designed and hand-assembled in Toulouse. The company uses a network of highly qualified suppliers and subcontractors from the European aerospace industry.

Additional information

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Questions & Answers

How is the volume adjusted on the Kora TB140?
Volume is adjusted with a multi-function rotary knob on the front panel, which also serves for navigating the menu.

What connections are available on the Kora TB140?
The amplifier features four line inputs, a phono input for MM cartridges, a pre-out and speaker outputs.

Is the Kora TB140 compatible with both MM and MC cartridges?
The phono input is specifically designed for MM cartridges and does not support MC cartridges.

Can the Kora TB140 be integrated into a home cinema system?
Yes, the fourth line input can be set to bypass mode, allowing the amplifier to function within a home cinema setup.

How long does the startup process of the Kora TB140 take?
When turned on, the amplifier goes through a warm-up phase of several tens of seconds to stabilize the tubes.

Does the Kora TB140 come with a remote control?
Yes, a metal remote control is included for functions such as volume adjustment and source selection.

What technology is used in the Kora TB140 for signal amplification?
The amplifier uses Square Tube® technology, a hybrid design that combines tubes and transistors for optimal performance.

What are the dimensions and weight of the Kora TB140?
The amplifier measures 420 x 118 x 370 mm and weighs 9.5 kg.

Is there a headphone jack on the Kora TB140?
No, the amplifier does not have a headphone jack.
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Alles over | Kora TB140

Description Freakuence! | Kora TB140

The Kora TB140 immediately stands out for its quirky design. A square tube amp. Here it is not hunted for trends, but for character.
Retail price: 5650.00

General description | Kora TB140

This integrated amplifier system uses the Square Tube® circuit, which employs four triodes per channel. This innovative configuration provides complete signal amplification. The output voltage of the Square Tube® circuit is applied directly to the speaker terminals. Audio power transistors, which are exceptionally linear, provide only impedance matching and deliver the necessary current to the speakers without further amplifying the signal. This approach eliminates problems common to traditional output transformers, such as phase shifts in both low and high frequencies, poor low-frequency behavior and current limitations. The chassis is made entirely of aluminum and steel and finished in mineral gray. The front panel features an acrylic panel over three-quarters of the top section, with a recessed rotary knob on the right side for menu navigation. The system features four line inputs and one phono MM input, with an input impedance of 47 kΩ for the phono input and 15 kΩ for the line inputs. Output power is 2 x 70 W at 8 Ω and 2 x 100 W at 4 Ω. The bandwidth runs from 20 Hz to 20 kHz with a ±1 dB deviation. The system weighs 9.5 kg and has dimensions of 118 x 420 x 370 mm.

Specifications Kora TB140 | Kora TB140

Power: 2 x 70 W at 8 Ω; 2 x 100 W at 4 Ω Inputs: 4 analog RCA inputs 1 MM phono input Outputs: 1 pre-out 1 pair of loudspeaker outputs Dimensions (W x H x D): 420 x 100 x 340 mm Weight: 9.5 kg Power supply: IEC connector, 230 V AC (+7% / -10%) Maximum power consumption: 310 VA (2 x 100 W / 4 Ω); 210 W (2 x 70 W / 8 Ω) Internal power supply: 2 x (±44 V DC), dual power supply Transformer: 300 VA toroidal transformer High voltage: +280 V stabilized, -180 V stabilized Tubes: 4 triodes per channel Enclosure: Aluminum and steel Color: Mineral gray

Background information | Kora TB140

The Kora TB140 was designed in Toulouse by engineer Bruno Ginouvès, with a focus on natural sound and musical experience. The amplifier uses the hybrid "Square Tube" topology, a unique configuration with a tube preamp and a transistor output stage. High-quality cabling is used internally, with short signal paths for minimal distortion. The cabinet is sturdy and beautifully finished, largely with parts from Europe.

Brand history | Kora TB140

Kora was founded in 1990 in Portet-sur-Garonne, near Toulouse, France. Initially, the company produced power supplies and signal processing circuits for the aerospace industry. Later, Kora began offering amplifier kits and in 1994 introduced their first high-fidelity amplifier, the Design 30. In 2018, Kora reintroduced itself with the development of the patented "Square Tube" technology, a new approach to tube amplification. All Kora products are completely designed and hand-assembled in Toulouse. The company uses a network of highly qualified suppliers and subcontractors from the European aerospace industry.

Questions & Answers | Kora TB140

How is the volume adjusted on the Kora TB140?

Volume is adjusted with a multi-function rotary knob on the front panel, which also serves for navigating the menu.

What connections are available on the Kora TB140?

The amplifier features four line inputs, a phono input for MM cartridges, a pre-out and speaker outputs.

Is the Kora TB140 compatible with both MM and MC cartridges?

The phono input is specifically designed for MM cartridges and does not support MC cartridges.

Can the Kora TB140 be integrated into a home cinema system?

Yes, the fourth line input can be set to bypass mode, allowing the amplifier to function within a home cinema setup.

How long does the startup process of the Kora TB140 take?

When turned on, the amplifier goes through a warm-up phase of several tens of seconds to stabilize the tubes.

Does the Kora TB140 come with a remote control?

Yes, a metal remote control is included for functions such as volume adjustment and source selection.

What technology is used in the Kora TB140 for signal amplification?

The amplifier uses Square Tube® technology, a hybrid design that combines tubes and transistors for optimal performance.

What are the dimensions and weight of the Kora TB140?

The amplifier measures 420 x 118 x 370 mm and weighs 9.5 kg.

Is there a headphone jack on the Kora TB140?

No, the amplifier does not have a headphone jack.

Reviews & awards | Kora TB140

Alpha Audio

rates the Kora TB140 as a very musical amplifier with smooth, clean and detailed playback, and a nice 3D soundstage. The innovative technology provides a fresh, fast and transparent sound. Cons are the lack of balanced connections and the plastic remote control.

HiFi Advice

emphasizes that the Kora TB140 is a rare product that truly surprises. The sound combines the purity of a single-ended triode (SET) with remarkable bass control and can drive any speaker, even the Magico Q5. The amplifier is highly recommended for those who value neutrality and appreciate an open, possibly slightly analytical presentation.

Audio.com.pl

notes that the Kora TB140 produces a sound that is at the center of tube sound, with a warm and rich character. While not a dynamic marvel, it offers a cohesive and refined sound that is especially suitable for listeners seeking a relaxed and natural listening experience.

Twittering Machines

emphasizes that the Kora TB140 takes an innovative approach by combining tubes and transistors in an unusual way. This results in an amplifier that combines the purity of a single-ended triode (SET) with remarkable bass control, making it capable of driving even demanding speakers.
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