KV2 Audio JKP User Manual

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JK1 -
t
JK2 -
t
JKA -
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JKP -
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JKT -
JK DI-Boxes
User Guide
Active DI BOX
Stereo DI BOX
Acoustic DI BOX
Passive DI BOX
Tone Generator
The future of sound. Made perfectly clear.
At KV2 Audio our vision is to constantly develop technologies that eliminate distortion and loss of information providing a true dynamic representation of the source.
Our aim is to create audio products that absorb you, place you within the performance and deliver a listening experience beyond expectation.
Contents
JK1 - Active DI BOX - Line Driver 4
Features 4 Specications 5 Connection 5
JK2 - Stereo DI BOX - Line Driver 6
Features 6 Specications 7 Connection 7
JKA - Acoustic DI BOX - Line Driver 8
Features 8 Specications 9 Connection 9
JKP - Passive DI BOX - Transformer Balanced 10
Features 10 Specications 11 Connection 11
JKT - Tone Generator 12
Features 12 Specications 13 Connection 13
Warranty 14
Service 14
JK - series
Named after company founder and chief engineer, George ‘Jiri’ Krampera, the JK Series of DI Boxes and Audio Tools retain KV2’s philosophy of the best possible signal path from source to speaker. The JK Series consists of the JK1 Single Channel DI, JK2 Stereo DI, JKA Single Channel Acoustic DI with Resonance Notch Filter and the JKP Single Channel Passive DI and Mic Splitter. Also included in the range is the JKT Tone Generator, a useful solution-provider audio tool that will assist every engineer in the tuning and checking of systems and components.
KV2’s JK series represents the pinnacle in DI technology, by oering a higher headroom and lower output impedance, than any other DI on the market. This simply means the JK Series can deliver crystal clear, distortion free audio from the hottest sources, without a hint of signal degradation over greater distance. KV2 has optimized the use of phantom power with a special switching power supply on the JK Series, to enable an impressive 20 volts of peak power on the internal rails. This allows the JK Series to deliver 50 Ohms on the XLR output giving true line driver capability delivering greater audio integrity and the ability to send high quality signal four times the distance of it’s nearest competitor.
All JK Series DI boxes are hand built in the Czech Republic utilizing high quality components and transformers. Full transformer balancing ensures the highest possible signal integrity without interference from RF or ground loops. The heavy-duty steel enclosure provides maximum protection for the electronics and further shielding against external interference. KV2 stands by the build quality of these units with a full 5-year warranty.
JK1 - Active DI BOX - Line Driver
The JK1 features two 1/4” jack inputs with mix or parallel function with a variable low cut lter and 15dB pad. Phase Shift and Ground Lift switches are also available. The JK1 is ideal for connection of single keyboards, guitars or instrument amplier output conditioning or combining two inputs via the mix function.
JK-series
JK2 - Stereo DI BOX - Line Driver
The JK2 features two 1/4” jack inputs with parallel monitor outputs as well as RCA inputs. The JK2 has two completely separate channels and can be used with two dierent instruments or stereo instruments. The JK2 features a variable Pad, Phase Shift and ground lift.
JKA - Acoustic DI BOX - Line Driver
The JKA is a dedicated DI for acoustic instruments. The JKA features a high-impedance 1/4” jack input capable of receiving signal from all types of pick-ups. A +10dB gain boost is available for low-level instruments. The JKA also features a tunable notch lter for eliminating the resonant frequency in an acoustic instrument, reducing feedback issues.
JKP - Passive DI BOX - Transformer Balanced
Serves as a universal passive DI box with low output impedance. The JKP features one XLR input and two 1/4” jack inputs in parallel. The JKP is dedicated for multiple instruments connection such as keyboards, guitars or instrument ampliers output conditioning. The JKP also features phantom power supply transmission for condenser microphone connection and output signal conditioning.
JKT - Tone Generator
The JKT is the perfect tool for checking and tuning PA systems along with various pieces of equipment. Phantom powered it has two XLR Outputs and 1/4” Jack Out. The JKT delivers a full range of tones from 20Hz through to 30kHz, as well as both White Noise and Pink Noise.
Overview
3
JK1 - Active DI BOX - Line Driver
JK1 - Active DI BOX - Line Driver
The JK1 features two 1/4” jack inputs with mix or parallel function with a variable low cut lter and 15dB pad. Phase shift and ground lift switches are also available. The JK1 is ideal for connection of single keyboards, guitars and instrument amplier output conditioning or combining two inputs via the mix function.
1. Phantom Power Supply
For ease of use, maximum headroom and low noise the JK1 is powered by phantom power from the mixing console. A green LED indicates the presence of
JK1
MADE IN CZECH REPUBLIC
JK1, ACTIVE DI BOX
Product number:
KVV 987 205
3. Low Cut Switch
Selects the high pass lter frequency point between 160 and 80Hz. Ideal for eliminating unwanted bass rumble from instruments.
4. Low Impedance Output
The main symmetrical LINE OUT output has an impedance of 50Ω and it is Intended for connection to a mixing desk. The output is separated galvanically from the input.
5. PHASE Switch Selector
Selects between 0° and 180° for LINE OUT output. This switches the XLR pin-2 and pin-3 to interface with older equipment. Also can be used when the instrument is being reproduced by the DI and microphone to avoid cancellation.
6. GND Ground Switch Selector
This ground-lift switch breaks the ground between the input & the output to eliminate hum and noise caused by ground loops. The GND position - the grounds for the input and output are interconnected ideal if the signal source is not grounded. The LIFT position - the grounds for the input and the output are disconnected. It is used if the signal source is grounded and you are experiencing ground loop problems.
phantom power. Simply switch on phantom power on your console and you are good to go.
2. Input Selection Switch
The JK1 features two asymmetrical inputs with 1/4“ jack connectors. These inputs can be set as a parallel (input is present on thru), mixed together (inputs placed into the input and thru are mixed together) or parallel with -15dB attenuation on input.
OFF
80Hz
160Hz LIFT
JK1 - FRONT PANEL
1
4
LINE OUT 50Ω
PHANTOM IN
JK1 - REAR PANEL
2 263
PARALLEL
-15dB
GND
MIX
PARALLEL
5
PHASE
180º
Features
THRU
JACK 1/4
INPUT
JACK 1/4
4
PARRALLEL
MIX
PARRALLEL
-15dB
INPUT
SETTING
LOW CUT
20Hz
80Hz
LOW CUT
160Hz
JK1 Block diagram
GND
DC
DC
convertor
ON
PHASE
2
1
3
LINE OUT
PHANTOM POWERED LOW Z 50Ω
JK1 Connection
JK1 - SPECIFICATIONS
System Acoustic Perfomance Features
-1dB Response 20Hz ÷ 100kHz Gain 0 / -15dB
Dynamic Range >130dB Phase 0° / 180°
Total Harmonic Distortion <0.002% High Pass Filter 20, 80, 160Hz
Indicators Power-ON LED
Ground Mode GND / Lift
Signal Input Power
Input Channels 2x 1/4" Jack Phantom Power 48÷56V / 8mA
Input Impedance 1MΩ / 5KΩ
Max. Input voltage 5V / 20V peak
Signal Output Physical Dimensions
Output channels XLR (line) Height 40mm (1.57")
Output Impedance 50Ω Width 80mm (3.15")
Depth 131mm (5.16")
Weight 610g (1.34lbs)
JK1 - PARALLEL INPUTS SETUP EXAMPLE
JK1
ON STAGE INSTRUMENT AMPLIFIER
MIXING CONSOLE
JK1 - MIX INPUTS SETUP EXAMPLE
ON STAGE MONITOR
20Hz
GND
80Hz
160Hz LIFT
JK1 - FRONT PANEL
LINE OUT 50Ω
PHANTOM IN
JK1 - REAR PANEL
20Hz
GND
80Hz
160Hz LIFT
JK1 - FRONT PANEL
LINE OUT 50Ω
PHASE
180º
PHANTOM IN
JK1 - REAR PANEL
PARALLEL
PARALLEL
PARALLEL
MIX
-15dB
MIX
PARALLEL
PARALLEL
LEFT
RIGHT
-15dB
MIX
Connection
MIXING CONSOLE
5
JK2 - Stereo DI BOX - Line Driver
JK2 - Stereo DI BOX - Line Driver
The JK2 features two 1/4” jack inputs with parallel monitor outputs as well as RCA inputs The JK2 has two completely separate channels and can be used with two dierent instruments or stereo instruments. The JK2 features a variable pad, phase shift and ground lift.
1. Phantom Power Supply
For ease of use, maximum headroom and low noise the JK2 is powered by phantom power from the mixing console. A green LED indicates the presence of
JK2
MADE IN CZECH REPUBLIC
JK2, STEREO DI BOX
Product number:
KVV 987 217
3. GAIN Switch
Using the GAIN switch selector the input sensitivity of the JK2 can be adapted at three levels: 0dB, -12dB,
-24dB, so very high-level inputs can be suitably reduced for clear, distortion-free reproduction.
4. XLR 50ohm Outputs
The JK2 includes two LINE OUT outputs with XLR connectors. Outputs work with an impedance of 50Ω and it is intended for connection to a mixing desk. The outputs are separated galvanically from the input.
5. PHASE Switch Selector
Selects between 0° and 180° for LINE OUT output. This switches the XLR pin-2 and pin-3 to interface with older equipment. Also can be used when the instrument is being reproduced by the DI and microphone to avoid cancellation.
6. GND Ground Switch Selector
This ground-lift switch breaks the ground between the input & the output to eliminate hum and noise caused by ground loops. The GND position - the grounds for the input and output are interconnected ideal if the signal source is not grounded. The LIFT position - the grounds for the input and the output are disconnected. It is used if the signal source is grounded and you are experiencing ground loop problems. The RC position - the grounds for the input and the output are interconnected via a parallel RC combination. It is used to suppress static disturbance.
Features
INPUT A
JACK 1/4
INPUT A
JACK 1/4
INPUT A
RCA
phantom power. Simply switch on phantom power on your console and you are good to go. The JK2 can be powered to channel A, channel B or both outputs, which provides best results.
2. Multiple Inputs
Each channel features two paralleled inputs (A, B) each equipped with 1/4“ jack connectors and stereo RCA inputs on the rear of the unit.
3 5 5 3
0dB-12dB -24dB 0dB-12dB -24dB
62
INPUT A INPUT B
JK2 - FRONT PANEL
1
LINE OUT B
1
4
LINE OUT A
JK2 - REAR PANEL
LINE OUT A
2
3
PHANTOM POWERED
1
LOW Z 50Ω
-24dB 0dB
GAIN
- 12dB
PHASE
DC
DC
convertor
ON
2
4
INPUT A
INPUT B
INPUT B
JACK 1/4
INPUT B
JACK 1/4
INPUT B
PHASE
-12dB
-24dB 0dB
GAIN
RCA
JK2 Block diagram
RC
LIFT
GND
GND
LINE OUT B
2
3
PHANTOM POWERED
1
LOW Z 50Ω
6
JK2 Connection
JK2 - SPECIFICATIONS
System Acoustic Perfomance Features
-1dB Response 10Hz ÷ 40kHz Gain Pad 0 / -12 / -24dB
Dynamic Range >120dB Phase 0° / 180°
Total Harmonic Distortion <0.005% Indicators Power-ON LED
Ground Mode GND / Lift / RC
Signal Input Power
Input Channels 2x 1/4" Jack + 2x RCA Phantom Power 48÷56V / 8mA
Input Impedance 2x 1MΩ / 10KΩ
Max. Input voltage 1V / 5V / 20V peak
Signal Output Physical Dimensions
Output channels 2x XLR, 2x 1/4" Jack THRU Height 40mm (1.57")
Output Impedance 50Ω Width 80mm (3.15")
Depth 131mm (5.16")
Weight 630g (1.39lbs)
JK2 - STEREO INSTRUMENT SETUP EXAMPLE
STEREO INSTRUMENT
0dB-12dB-24dB 0dB-12dB-24dB
JK2
ON STAGE STEREO INSTRUMENT AMPLIFIER
MIXING CONSOLE
JK2 - STEREO PLAYER SETUP EXAMPLE
MIXING CONSOLE
INPUT A INPUT B
JK2 - FRONT PANEL
LINE OUT B
JK2 - REAR PANEL
0dB-12dB-24dB 0dB-12dB-24dB
INPUT A INPUT B
JK2 - FRONT PANEL
LINE OUT B
JK2 - REAR PANEL
LINE OUT A
LINE OUT A
INPUT A
INPUT B
Connection
INPUT A
INPUT B
STEREO PLAYER
7
JKA - Acoustic DI BOX - Line Driver
JKA - Acoustic DI BOX - Line Driver
The JKA is a dedicated DI for acoustic instruments. The JKA features a high-impedance 1/4” jack input capable of receiving signal from all types of pick-ups. A +10dB gain boost is available for low-level instruments. The JKA also features a tunable notch lter for eliminating the resonant frequency in an acoustic instrument, reducing feedback issues.
1. Phantom Power Supply
For ease of use, maximum headroom and low noise the, JK1 is powered by phantom
JKA
MADE IN CZECH REPUBLIC
JKA, ACOUSTIC DI BOX
Product number:
KVV 987 204
3. Line Out XLR Output
The main symmetrical LINE OUT output works with an impedance of 50Ω and it is intended for connection to a mixing desk. The output is not separated galvanically from the input.
4. Monitor Out 1/4“ Jack Output
The adjacent symmetrical MONITOR OUT 1/4“ jack output has an impedance of 100Ω, the same level as LINE OUT and it is separated from the main output using a transformer. When using a mono jack the relevant input is switched automatically to the asymmetrical mode. It can be used for monitoring on the stage.
5. Tunable NOTCH Filter
To eliminate the dominant self-resonance, (feedback) of any acoustic instrument, the JKA is equipped with a phase switch selector and a tunable NOTCH lter with a switchable attenuation level of - 6dB and -12dB. Recommended method of adjustment for the NOTCH lter: a) Increase the amplication until the acoustic instrument feeds back b) Suppress the acoustic feedback at low frequencies using the PHASE switch c) Increase the amplication until the acoustic instrument feeds back again, put the NOTCH switch selector to the - 6dB position and eliminate the feedback by use of the potentiometer. If the acoustic feedback continues to happen at the same frequency put the NOTCH switch selector in the -12dB position.
power from the mixing console. A green LED indicates the presence of phantom power. Simply switch on phantom power on your console and you are good to go.
2. High Impedance Input
The JKA includes one 1/4“ high impedance jack input. It is adapted to connect the pick-up of acoustic instruments that require high load impedance (e.g. Piezo electric pick-ups). By using the GAIN selector switch, the amplication of the JKA can be increased by +10dB.
FREQ
NOTCH
JKA - FRONT PANEL
4
MONITOR OUT
JKA - REAR PANEL
1
LINE OUT
65
2
GAIN
PHASE
2
3
INPUT
6. PHASE Switch Selector
Features
Selects between 0° and 180° for LINE OUT output. This switches the XLR pin-2 and pin-3 to interface with older equipment. Also can be used when the instrument is being reproduced by the DI and microphone to avoid cancellation.
INPUT
JACK 1/4
0dB
+10dB
GAIN
-12dB
NOTCH FILTER
NOTCHFREQ
0dB
- 6dB
PHASE
ON
LINE OUT
2
3
PHANTOM POWERED
1
LOW Z 50Ω
MONITOR OUT
600Ω
JKA Block diagram
8
JKA Connection
JKA - SPECIFICATIONS
System Acoustic Perfomance Features
-1dB Response 10Hz ÷ 40kHz Gain 0/ +10dB
Dynamic Range >130dB Phase 0° / 180°
Total Harmonic Distortion <0.03% Indicators Power-ON LED
Signal Input Power
Input Channels 1/4" Jack Phantom Power 48÷56V / 8mA
Input Impedance 1MΩ
Max. Input Voltage 2,5V / 7V peak
Signal Output Physical Dimensions
Output channels XLR (line) , 1/4" Jack Height 40mm (1.57")
Output Impedance 50Ω(line) / 600Ω Width 80mm (3.15")
JKA - ACOUSTIC INSTRUMENT SETUP EXAMPLE
JKA - FRONT PANEL
FREQ
GAIN
NOTCH
Notch Filter 75 ÷ 1650Hz (0, -6, -12dB)
Depth 131mm (5.16")
Weight 600g (1.32lbs)
PHASE
JKA
ON STAGE STEREO INSTRUMENT AMPLIFIER
MONITOR OUT
MIXING CONSOLE
JKA - REAR PANEL
INPUT
LINE OUT
Connection
9
JKP - Passive DI BOX - Transformer balanced
JKP - Passive DI BOX - Transformer Balanced
The JKP is a universal passive DI box with low output impedance. The JKP features one XLR input and two 1/4” jack inputs in parallel. The JKP is dedicated for multiple instruments connection such as keyboards, guitars or instrument ampliers output conditioning. The JKP also features phantom power supply transmission for condenser microphone connection and output signal conditioning.
1. Phantom Power Through
MICROPHONE
SPLITTER
JKP
MADE IN CZECH REPUBLIC
JKP, PASSIVE DI BOX
Product number:
KVV 987 201
3. XLR and Jack Inputs
The JKP features two inputs with the XLR and 1/4” jack connector connected in parallel. Both outputs are connected symmetrically. When using a mono jack, the relevant input is switched automatically into the asymmetrical mode. To split a microphone signal to dierent sources simply plug it into the XLR input. The JKP has the ability to send high quality microphone signal long distances (Up to 300m).
4. RATIO Switch Selector 1:2 / 1:4
This is intended for changing the voltage and impedance ratio. For example, a condenser microphone's impedance can be decreased 16 times (1:4 position) which will improve the sound quality and capability of the microphone to drive long cables. The 1:2 position can also be used to improve the sound quality on dynamic microphones. Both inputs can be disconnected from the ground. The 1:4 ratio is for use with high impedance sources and the 1:2 ratio is for lower impedance sources.
5. GND Ground Switch Selectors
This ground-lift switch breaks the ground between the input & the output to eliminate hum and noise caused by ground loops. The GND position - the grounds for the input and output are interconnected. It is used if the signal source is not grounded. The LIFT position - the grounds for the input and the output are disconnected.
Features
It is used if the signal source is grounded. Interruption of the ground loop. The RC position - the grounds for the input and the output are interconnected via a parallel RC combination. It is used to suppress static disturbance.
PARALLEL INPUT
JACK 1/4
INPUT
XLR / JACK 1/4
COMBINED
The JKP DOES NOT REQUIRE PHANTOM POWER TO OPERATE. When using a condenser microphone that requires a phantom power from the mixing desk, turn the PHANTOM THROUGH switch selector to the ON position and the RATIO switch selector to the 1:4 position, (so that both switch selectors are in the top position). In position 1:2, no phantom power will be passed through the unit to the microphone.
2. Monitor and Line Outputs
The symmetrical LINE OUT output works with an impedance of 100Ω and with a ratio of 1:2 or 1:4. The adjacent MONITOR OUT output has an output impedance of 600Ω and a level 6dB higher than the LINE OUT output. The ratio of the monitor output is half that of the line output. (1:2 LINE = 1:1 MONITOR OUTPUT)
3341
PHANTOM THROUGH
PARALLEL INPUT
JKP - FRONT PANEL
5 52 2
MONITOR OUT
GND
GND LIFT
RC
JKP - REAR PANEL
1
3
2
PHANTOM THROUGH
RATIO
1:2 1:4
2
LINE OUT
3
1
LOW Z, 100Ω
GND
RC
LIFT
GND
RC
LIFT
LINE OUT
10
JKP Block diagram
GND
2
3
1
MONITOR OUT
600Ω
JKP Connection
JKP - SPECIFICATIONS
System Acoustic Perfomance Features
-1dB Response 20Hz ÷ 30kHz Gain Ration 1:2 / 1:4
Total Harmonic Distortion <0.0005% Ground Mode GND, Lift, RC
Signal Input Power
Input Channels 1/4" Jack, XLR// 1/4" Jack Phantom Power Phantom through
Input Impedance 1MΩ
Signal Output Physical Dimensions
Output channels XLR (line) , XLR (monitor) Height 40mm (1.57")
Output Impedance 100Ω (line) / 600Ω (mon.) Width 80mm (3.15")
JKP - CONDENSER MIC SETUP EXAMPLE
PHANTOM
PHANTOM THROUGH
RATIO 1:4
THROUGH
PARALLEL INPUT
JKP - FRONT PANEL
MONITOR OUT
GND
GND
LIFT RC
Depth 131mm (5.16")
Weight 590g (1.3lbs)
LINE OUT
JKP
MICROPHONE SPLIT MIXING CONSOLE
JK1 - PARALLEL INPUTS SETUP EXAMPLE
PHANTOM
ON STAGE INSTRUMENT AMPLIFIER
MIXING CONSOLE
OFF
JKP - REAR PANEL
PHANTOM THROUGH
PARALLEL INPUT
JKP - FRONT PANEL
MONITOR OUT
GND
GND
LIFT RC
JKP - REAR PANEL
FOH - MIXING CONSOLE
Connection
LINE OUT
11
JKT - Tone Generator - Phantom powered
JKT - Tone Generator
The JKT is the perfect tool for checking and tuning PA systems along with various pieces of equipment. Phantom powered it has two XLR Outputs and ¼” Jack Out. The JKT delivers a full range of tones from 20Hz through to 30kHz, as well as both White Noise and Pink Noise.
1. Phantom Power Supply
For ease of use, the JKT is powered by phantom power from the mixing console. Phantom power supply presence is indicated by a single green LED.
JKT
MADE IN CZECH REPUBLIC
JKT, TONE GENERATOR
Product number:
KVV 987 272
4. Frequency Selector
Sets the frequency range of the continuous frequency selector of the sine wave generator in ranges (20Hz ÷ 300Hz), (200Hz ÷ 3kHz) and (2kHz ÷ 30kHz).
5. Output Level
Sets the output level of selectable generators.
2. Multiple Outputs
The symmetrical LINE OUT output works with an impedance of 50Ω, and is intended to be connected to a mixing console or any phantom power source device. The adjacent MONITOR OUT output has an output impedance of 600Ω and paralleled 1/4” jack connector output.
3. Generator Selector
The JKT features a sine wave, tone generator with a frequency range from 20Hz to 30kHz, pink and white noise generator.
FREQ
120
100
150
60
180
30
280
300
20
JKT - FRONT PANEL
2
OUTPUT
1
53
LEVEL
7
9
2
OUTPUT
44
2
Features
12
PINK NOISE
generator
TONE
generator
FREQ
x1 x10
20-300Hz
WHITE NOISE
generator
x100
PINK NOISE
SINE
WHITE NOISE
LEVEL
JKT Block diagram
POWER
Power
source
JKT - REAR PANEL
OUTPUT
2
3
PHANTOM POWERED
1
LOW Z 50Ω
2
OUTPUT
3
1
600Ω
PARALLEL OUTPUT
PHANTOM IN
JKT Connection
JKT - SPECIFICATIONS
Signal Output Power
Output channels Jack 1/4", 2x XLR Phantom Power 48÷56V / 8mA
Output Impedance 50Ω (line) / 600Ω (mon.)
Features Physical Dimensions
Output Level control
-∞ ÷ 0dB Indicators Power-ON LED Width 80mm (3.15")
Tone generator 20Hz ÷ 30kHz Depth 131mm (5.16")
White noise generator
YES
Pink noise generator YES
JKT - TONE GENERATOR, PA TUNING & EQUIPMENT TESTING
JKT - FRONT PANEL
FREQ
120
100
150
60
180
30
280
300
20
LEVEL
Height 40mm (1.57")
Weight 630g (1.39lbs)
7
9
JKT
INSTRUMENT AMPLIFIER TEST
ACTIVE SPEAKER CHECK
OUTPUT
MIXING CONSOLE
JKT - REAR PANEL
OUTPUT
PHANTOM IN
PA SYSTEM
Connection
13
Warranty
WARRANTY
Your JK DI BOX is covered against defects in material and workmanship. Refer to your supplier for more
details.
SERVICE
In the unlikely event that your JK DI BOX develops a problem, it must be returned to an authorized distributor , service centre or shipped directly to our factory. Because of the complexity of the design all repairs must be attempted only by qualied technical personnel. If the unit needs to be shipped back to the factory, it must be sent in its original carton. If improperly packed,
JK-DI
the unit may be damaged. To obtain service, contact your nearest KV2 Audio Service Centre, Distributor or Dealer .
Warranty
14
The future of sound. Made perfectly clear.
At KV2 Audio our vision is to constantly develop technologies that eliminate distortion and loss of information providing a true dynamic representation of the source.
Our aim is to create audio products that absorb you, place you within the performance and deliver a listening experience beyond expectation.
KV2 Audio, Nádražní 936, 399 01 Milevsko, Czech Republic Tel. +44(0)1423 816868
www.kv2audio.com
KVV120076-00-01-0
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