Integrated amplifiers

Kora TB140

Product

Kora TB140

Like the entire range of Kora amplifiers, the TB140 is powered by the Square Tube® operational amplifier. Equipped with 4 triodes per channel, this innovative assembling gives all its qualities to the amplifier.

 

SquareTube® provides every amplification functions. Its output voltage is the one that will be applied to the speaker outputs. Audio power transistors, exceptionally linear, are the only ones to provide what technicians call “impedance matching”. The transistors will give the speakers the required current, without amplifying the signal. Their role is somewhat the same as the one generally assigned to the output transformer.

 

However, the SquareTube® / Transistors combination does not know the difficulties associated with the usual transformers:

 

> no phase shifts on low frequencies,

> no phase shifts on high frequencies,

> no bad coupling on low end,

> and above all: no current limitation!

 

The combination of SquareTube®’s high voltage capacity and the high current of the output transistors gives you an unmatched high definition power amplifier.

 

> The tubes give you softness, the transistors offer you unrestrained energy

> SquareTube® offers phase accuracy and will reveal an abundance of unsuspected details from your sources with natural dynamics.

> The amplifier is highly stable, even on complex loads.

General features
Overall dimension 118 x 420 x 370 mm
Box size only 100 x 420 x 340 mm
Unit weight 9,5 kg
Manufacturer warranty 5 years
Material Aluminium & steel
Colour Mineral gray
Accessoires Remote control, power supply cord, instruction manual
Construction & design Toulouse, Occitanie region, France
Electronic features
Power source Prise CEI, 230 V AC, +7% ~ -10%, (117 V AC on demand). Maximum power consumption (2 x 100 /4Ω) : 310 VA, Maximum power consumption (2 x 70 W/8 Ω) : 210 W
Internal power supply 2 x (± 44 V DC), double power supply
Power supply transformer 300 VA toroidal transformer Two 10 VA power transformers (auxiliary voltages)
Main filtering 2 x 44 000 µF
High voltage + 280 V Stabilized, - 180 V Stabilized
Heating of the inlet tubes 2 x 12 V DC Regulated and ground references voltages
Heating of the outlet tubes 2 x 12 V AC Isolated AC regulated voltages
Power output and distribution 2 x 70 W/8 Ω, 2 x 100 W/4 Ω. Output power distribution made by four complementary highly linear - power transistors «MOTOROLA ®» (225 W/15 A each)
Inputs Phono MM, internal impedance: 47 kΩ, sensibility: 4 mV, RIAA Correction. 4 entry lines, iinternal impedance: 15 kΩ, sensibility 1 V. Pre-out, impedance 2 kΩ, after volume adjustment
Passband 20 Hz - 20 000 Hz ± 1 dB
Internal impedance Output: < 0.08 Ω
These specifications are subject to change without notice.
Product
Product
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Specifications

Kora TB200

Product

Kora TB200

Like the entire range of Kora amplifiers, the TB200 is powered by the Square Tube® operational amplifier. Equipped with 4 triodes per channel, this innovative assembling gives all its qualities to the amplifier.

 

SquareTube® provides every amplification functions. Its output voltage is the one that will be applied to the speaker outputs. Audio power transistors, exceptionally linear, are the only ones to provide what technicians call “impedance matching”. The transistors will give the speakers the required current, without amplifying the signal. Their role is somewhat the same as the one generally assigned to the output transformer.

 

However, the SquareTube® / Transistors combination does not know the difficulties associated with the usual transformers:

 

> no phase shifts on low frequencies,

> no phase shifts on high frequencies,

> no bad coupling on low end,

> and above all: no current limitation!

 

The combination of SquareTube®’s high voltage capacity and the high current of the output transistors gives you an unmatched high definition power amplifier.

 

> The tubes give you softness, the transistors offer you unrestrained energy

> SquareTube® offers phase accuracy and will reveal an abundance of unsuspected details from your sources with natural dynamics.

General features
Overall dimension 148 x 420 x 350 mm
Box size only 130 x 420 x 320 mm
Unit weight 17,3 kg
Manufacturer warranty 5 years
Material Aluminium & steel
Colour Mineral grey
Accessoires Remote control, power supply cord, instruction manual
Construction & design Toulouse, Occitanie region, France
Electronic features
Power source CEI plug 230 V AC +7% ~ -10% (117 V AC on demand) Maximum power consumption (2 x 180 W/4 Ω): 610 VA Maximum power consumption (2 x 100 W/8 Ω): 310 W
Internal power supply 2 x (± 50 V DC), double power supply
Power supply transformer 2 x 300 VA. Additional voltage provided by 5 DC/DC modules and two linear controllers
Main filtering 60 000 µF par canal
High voltage + 300 V Stabilized, - 200 V Stabilized
Heating of the inlet tubes 2 x 12 V DC Regulated and ground referenced voltages
Heating of the outlet tubes 2 x 12 V DC Isolated DC regulated voltages
Power output & distribution 2 x 100 W/8 Ω, 2 x 180 W/4 Ω. Output power distribution made by twelve complementary highly linear - power transistors «MOTOROLA ®» (225 W/15 A each)
Inputs 4 entry lines, sensibility 1 V, internal impedance: 15 kΩ
Passband 20 Hz - 20 000 Hz ± 1 dB
Internal impedance Output: < 0.08 Ω
These specifications are subject to change without notice.
Product
Product
Product

Specifications

Kora TB400

Product

Kora TB400

Like the entire range of Kora amplifiers, the TB400 is powered by the Square Tube® operational amplifier. Equipped with 4 triodes per channel, this innovative assembling gives all its qualities to the amplifier.

 

SquareTube® provides every amplification functions. Its output voltage is the one that will be applied to the speaker outputs. Audio power transistors, exceptionally linear, are the only ones to provide what technicians call “impedance matching”. The transistors will give the speakers the required current, without amplifying the signal. Their role is somewhat the same as the one generally assigned to the output transformer.

 

However, the SquareTube® / Transistors combination does not know the difficulties associated with the usual transformers:

 

> no phase shifts on low frequencies,

> no phase shifts on high frequencies,

> no bad coupling on low end,

> and above all: no current limitation!

 

The combination of SquareTube®’s high voltage capacity and the high current of the output transistors gives you an unmatched high definition power amplifier.

 

> The tubes give you softness, the transistors offer you unrestrained energy

> SquareTube® offers phase accuracy and will reveal an abundance of unsuspected details from your sources with natural dynamics.

General features
Overall Dimension H 148 x L 420 x P 450 mm
Box size only H 130 x L 420 x P 420 mm
Unit weight 23,6 kg
Manufacturer warranty 5 years
Material Aluminium & steel
Colour Mineral grey
Accessories Remote control, power supply cord, instruction manual
Construction and design Toulouse, Occitanie Region, France
Electronic features
Power source CEI plug, 230 V AC, +7% ~ -10%. 117 V AC on demand. Maximum power consumption (2 x 360 W/4Ω) : 1010 VA Maximum power consumption (2 x 200 W/8 Ω) : 610 W
Internal power supply 2 x (± 65 V DC), double power supply
Power supply transformer 2 x 500 VA, additional voltages provided by 5 DC/DC modules and two linear controllers.
Main filtering 2 x 100 000 µF
High Voltage + 300 V stabilized - 200 V stabilized
Heating of the inlet tubes 2 x 12 V DC, Regulated and ground referenced voltages
Heating of the outlet tubes 2 x 12 V DC, Isolated DC regulated voltage
Power output 2 x 200 W/8 Ω, 2 x 360 W/4 Ω. Twenty complementary highly linear power transistors «MOTOROLA®» (225 W/15 A each)
Inputs 4 entry lines, internal impedance: 15 kΩ Sensibility: 1 V
Passband 20 Hz - 20 000 Hz ± 1 dB
Internal impedance Output: < 0.08 Ω
These specifications are subject to change without notice.
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Power amplifiers

Kora TA240

Product

Kora TA240

Like the entire Kora amplifier range, the TA 240 is powered by the Square Tube® operational amplifier. Equipped with 4 triodes per channel, this innovative circuitry provides very unique musical qualities to the amplifier.

 

The Square Tube® provides all functions of amplification and control of the audio signal. Its output voltage is that which will be applied to the speaker outputs. Complementary power transistors, audio and hyper-linear will give the current required by the speakers, but without interfering in the amplification of the signal. Technicians call it “Impedance matching”. The power transistors can be seen as the output transformer.

But the Square Tube® / Transistors combination does not face the limitation usually associated with the usual output transformers:
→ There are no phase shifts in the low frequencies,
→ There are no phase shifts in the high frequencies,
→ There is no bad coupling in the low frequencies and above all: no current limitation!

The combination of the high voltage capacitance of the Square Tube® and the high current of the output transistors gives you a very high definition power amplifier.
→ The tubes give the smoothness, the transistors give the unre- strained energy.
→ SquareTube® brings phase accuracy and will extract a wealth of unsuspected detail from your sources with natural dynamics. → At last but not least, the amplifier is very stable, even with complex loads.

General features
Overall dimension 148 x 420 x 350 mm
Chassis size only 130 x 420 x 320 mm
Unit weight 19 kg
Garantie constructeur 5 years
Materials Aluminium and steel
Finish Mineral grey
Accessories Remote control, 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 (2 x 200 W / 4 Ω) : 650 VA Maximum power consumption (2 x 120 W / 8 Ω): 350 W
Internal power supply 2 x (± 50 V DC), dual power supply
Power supply transformer 2 x 300 VA, auxiliary supply: 5 DC/DC converters 2 linear regulators
Main filtering 2 x 60 000 μF
High voltage + 300 V stabilised, ‒ 200 V stabilised
Input tube heater 2 x 12 V DC, regulated and grounded voltages
Output tube heating 2 x 12 V DC, isolated regulated voltages
Output power 2 x 120W / 8Ω, 2 x 200 W / 4Ω
Output power distribution 12 complementary highly linear power transistors “ON SEMI®” (225 W / 15 A each)
Inputs − 1 input asymmetrical, RCA connector input impedance: 10 k − 1 input symmetrical, 2 XLR connectors input impedance: 2 x 20 kΩ Sensitivity: adjustable from 0,5 V to 5 V
Bandwidth 20Hz ~ 20000Hz, ± 1dB
Internal impedance Output: < 0.08 Ω
THESE SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
Product

Specifications

Kora TA480

Product

Kora TA480

Like the entire Kora amplifier range, the TA 480 is powered by the Square Tube® operational amplifier. Equipped with 4 triodes per channel, this innovative circuitry provides very unique musical qualities to the amplifier.

The Square Tube® provides all functions of amplification and control of the audio signal. Its output voltage is that which will be applied to the speaker outputs. Complementary power transistors, audio and hyper-linear will give the current required by the speakers, but without interfering in the amplification of the signal. Technicians call it “Impedance matching”. The power transistors can be seen as the output transformer.

But the Square Tube® / Transistors combination does not face the limitation usually associated with the usual output transformers:
→ There are no phase shifts in the low frequencies,
→ There are no phase shifts in the high frequencies,
→ There is no bad coupling in the low frequencies and above all: no current limitation!

The combination of the high voltage capacitance of the Square Tube® and the high current of the output transistors gives you a very high definition power amplifier.
→ The tubes give the smoothness, the transistors give the unre- strained energy.
→ SquareTube® brings phase accuracy and will extract a wealth of unsuspected detail from your sources with natural dynamics.
→ At last but not least, the amplifier is very stable, even with complex loads.

General features
Overall dimension 148 x 420 x 450 mm
Chassis size only 130 x 420 x 420 mm
Unit weight 27 kg
Manufacturer’s warranty 5 years
Materials Aluminium and steel
Finish Mineral grey
Accessories Remote control, 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 (2 x 400 W / 4 Ω): 1050 VA Maximum power consumption (2 x 240 W / 8 Ω): 650 W
Internal power supply 2 x (± 65 V DC), dual power supply
Power supply transformer 2 x 500 VA, auxiliary supply: 5 DC/DC converters 2 linear regulators
Main filtering 2 x 100 000 μF
High voltage + 300 V stabilised, ‒ 200 V stabilised
Input tube heater 2 x 12 V DC, regulated and grounded voltages
Output tube heating 2 x 12 V DC, isolated regulated voltages
Output power 2 x 200 W / 8 Ω, 2 x 360 W / 4 Ω
Output power distribution 20 complementary highly linear power transistors “ON SEMI®” (225 W / 15 A each)
Inputs − 1 input asymmetrical, RCA connector input impedance: 10 k − 1 input symmetrical, 2 XLR connectors input impedance: 2 x 20 kΩ Sensitivity: adjustable from 0,5 V to 5 V
Bandwidth 20Hz ~ 20 000Hz, ± 1dB
Internal impedance Output: < 0.08 Ω
THESE SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
Product

Specifications