The CD140 combines a digital section (32 bits in 768 kHz) with an analog tube output. This output stage uses the Square Tube® operational amplifier. Equipped with 4 triodes per channel, this innovative circuit gives the analog signal all its qualities.
Digital signal processing recovers all the information recorded on the CD. AKM’s chip upsamples the signal to 768 kHz. This allows the signal to be filtered at higher frequencies, removing the residue of the digital conversion from the audible band. A circuit developed by Kora ensures that all digital clocks remain synchronized with the original CD signal. Digital -to-analog conversion is entrusted to a latest-generation ROHM DAC.
The Square Tube® ensures smooth, precise musicality. Powered by high voltage, the output stage has no amplitude limits: signal dynamics remain natural. With a pure-analog output filter, the respect of phases ensures exceptional spatialization. You’re totally immersed in a three- dimensional soundstage!
| General features | |
|---|---|
| Overall dimension | 118 × 420 × 355 mm |
| Chassis size only | 100 × 420 × 340 mm |
| Unit weight | 7 kg |
| Manufacturer’s warranty | 5 years |
| Materials | Aluminium and steel |
| Finish | Mineral grey |
| Accessories | Remote, power cord, instructions |
| Construction & design | Toulouse, Occitania region, France |
| Electronic features | |
|---|---|
| Power supply | IEC socket / 100 to 240 VAC / 50 Hz — 60 Hz / Consumption (Stand-by): < 0.5 W / Consumption (Normal operation): < 40 W |
| High voltages | +240 V stabilised / ‒240 V stabilised |
| Tube heating | 12 V DC / Regulated voltages referenced to ground |
| Sampling frequency | 768 kHz / Up sampler AKM |
| Conversion | 32 bits / Converter ROHM |
| Output | Analog / RCA sockets for coaxial cable |
| Bandwidth | 20 Hz ~ 20 000 Hz |
| Internal impedance | Output: < 50 Ω |
| Output level | For 0 dB : 2.28 V |
Specifications
The Kora Phono stage is a real «Swiss army knife» that will enable you to extract all the subtleties of your vinyl records while respecting the requirements of your pickup.
The phono Stage Kora is an audio adaptation of the EPC1 D, an ultra-low-noise laboratory preamplifier with unique characteristics (built by Kora’s professional division).
In the input stage, high-precision metal foil resistors are used. The correction capacitors use polystyrene technology. The Phono Stage adapts to all types of pickups, whether variable reluctance, moving magnets or moving coils.
The preamplifier features four individually programmable inputs. For each, you can set gain, input impedance, input capacitance and connection type. Two inputs are on three-pin «XLR» type sockets, which can be used to receive a cell connected symmetrically (two signal wires plus ground) or asymmetrically (one signal wire and a reference, ground). Two other inputs are coaxial «RCA» sockets. These two inputs are unbalanced by design.
The preamplifier has two unbalanced and two balanced outputs that can operate simultaneously.
On start-up, the phono adapter retains its previous programming. Without any action on your part, the previously used input is displayed and confirmed. To change input, simply rotate the encoder to select the active input. Each time the input is changed, the phono adapter is automatically reconfigured without further intervention.
All programmed parameters are stored in memory.
| General features | |
|---|---|
| Overall dimension | 320 × 91 × 280 mm |
| Chassis size only | 320 × 75 × 260 mm |
| Unit weight | 5 kg |
| Manufacturer’s warranty | 5 years |
| Materials | Aluminium and steel |
| Finish | Mineral grey |
| Accessories | Power cord, instructions |
| Construction & design | Toulouse, Occitania region, France |
| Electronic features | |
|---|---|
| Power supply | IEC socket / 100 to 240 VAC / 50 Hz — 60 Hz / Consumption (Stand-by): < 0.5 VA / Consumption (Normal operation): < 10 VA |
| Special features | Cell demagnetization Rumble, ‒6 dB cutoff at 7 Hz |
| Maximum output voltage | 8 V RMS |
| Symmetrical output | Analog / On 3-pin male XLR sockets |
| Asymmetrical output | Analog / On RCA sockets for coaxial cable |
| Input 1 & 2 | Analog / Selectable symmetrical or asymmetrical on XLR |
| Input 3 & 4 | Analog / Asymmetrical on RCA |
| Gain | Programmable: 150 — 300 — 500 — 750 — 1000 — 1500 — 3000 |
| Input impedance | Programmable: 50 kΩ or adjustable from 10 Ω to 1270 Ω, in 10 Ω steps |
| Input capacitor | Programmable: From 0 nF to 1.5 nF, in 0.1 nF steps |
| Input noise | 70 nV on the audio band |
| Correction | RIAA curve at +/‒ 1 dB |
| Bandwidth | 20 Hz ~ 20 000 Hz |
| Internal impedance | Output: < 50 Ω |
Specifications
Kora wished to offer you a converter whose design and realization leave no room for compromise.
8 inputs (SPDIF, optical, AES-EBU, USB) make your Kora DAC the nerve center of your system.
Technologically, as on the CD player, the clocks are realized by frequency multipliers, and are therefore in perfect synchronization with the sources.
Thanks to an AKM “up sampling” circuit, the digital flow is transformed into 32 bits and a maximum frequency of 768 kHz.
At the output of the converter, a “Square Tube” circuit ensures the filtering and the provision of the audio signal at the output. An additional balanced output is offered on a pair of XLR sockets.
| General features | |
|---|---|
| Overall dimension | 118 × 420 × 355 mm |
| Chassis size only | 100 × 420 × 340 mm |
| Unit weight | 6 kg |
| Manufacturer’s warranty | 5 years |
| Materials | Aluminium and steel |
| Finish | Mineral grey |
| Accessories | Power cord, instructions |
| Construction & design | Toulouse, Occitania region, France |
| Electronic features | |
|---|---|
| Power supply | IEC socket / 100 to 240 VAC / 50Hz — 60Hz. Consumption (Stand-by): < 0.5 W. Consumption (Normal operation): < 40 W |
| High voltages | +240 V stabilised / ‒240 V stabilised |
| Tube heating | 12 V DC / Regulated voltages referenced to ground |
| Sampling frequency | 768 kHz / Up sampler AKM |
| Conversion | 32 bits / Converter ROHM |
| Input | Digital: 4 RCA sockets for coaxial cable / 2 XLR / 2 TOSLINK / 1 USB B |
| Output | Analog: Prises RCA / Prises XLR |
| Bandwidth | 20 Hz ~ 20 000 Hz |
| Internal impedance | Output: < 50 Ω |
Specifications
Like most Kora devices, the PR 140 is powered by the SquareTube® operational amplifier. Equipped with 4 triodes per channel, this innovative circuit gives the analog signal
all its qualities. The reproduction of the tiniest details, and a respected dynamic range, give the PR 140 preamplifier a smooth, precise musicality and a natural feel. You forget about the system, and immerse yourself completely in the three-dimensional soundstage. In addition to the basic functions (volume, balance), the PR140 lets you balance the level of each of the five inputs (one balanced, four coaxial). Outputs are energetic and assertive, even on long cables.
Your PR140 can be extended! This is an option you can add to your preamplifier. It comes in the form of a drawer that you can place yourself to extend the range of possibilities offered by your device. A phono option: so you can plug in your vinyl turntable (MM/MC), DAC option: for connecting your digital signals. (2 coaxial, 2 optical)
| General features | |
|---|---|
| Overall dimension | 118 × 420 × 355 mm |
| Chassis size only | 100 × 420 × 340 mm |
| Unit weight | 7 kg |
| Manufacturer’s warranty | 5 years |
| Materials | Aluminium and steel |
| Finish | Mineral grey |
| Accessories | Remote, power cord, instructions |
| Construction & design | Toulouse, Occitania region, France |
| Electronic features | |
|---|---|
| Power supply | IEC socket. 100 to 240 VAC. 50Hz-60Hz. Consumption (stand-by): <0.5W. Consumption (normal operation): < 40W |
| High voltages | +240V stabilised / ‒240 V stabilised |
| Tube heating | 12 VDC. Regulated voltages referenced to ground |
| Extension Slot | Option DAC: 2 RCA coaxial inputs, 2 TOSLINK optical inputs. Option Phono-stage: phono pre-amplifier (MM/MC) |
| Input | Analog. 1 balanced input, 4 RCA coaxial inputs |
| Output | Analog. RCA sockets for coaxial cables, balanced sockets |
| Bandwidth | 20Hz ~ 20 000Hz |
| Internal impedance | Output: < 50Ω |
Specifications
NEW STEEL REMOTE
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 |
Specifications
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 |
Specifications
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 |
Specifications
PREAMPLIFIER
CD PLAYER
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 |
Specifications
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 |
Specifications
