JK Audio have a range of professional digital hybrid's to suit your application and budget.

A digital hybrid connects audio signals to a standard analog telephone line without the variations in quality found with analog hybrids. The main function of a hybrid is to bring in the caller's voice, as clear and clean as possible. In the real world, when you send your voice down the telephone line it will bleed over into the caller's audio. The hybrid must adapt to the phone line in order to properly separate transmit and receive audio.

JK Audio Product Applications                                                               PDF Manual Downloads

JK BlueDriver Audio Interface

Our BlueDriver™ series audio interfaces use Bluetooth Wireless Technology* to send and receive audio from your professional audio equipment.

BlueDriver-F3™ plugs directly into a dynamic mic or the mic level output from a mixing console. Pair to your Bluetooth enabled cell phone or headset. The 3.5 mm stereo jack contains a mic level output suitable for recording, with the clean mic signal on the left channel and the Bluetooth return on the right.

BlueDriver-M3™ plugs into the mic input channel of a mixer. Pair to your Bluetooth equipped cell phone or headset. The 3.5 mm jack will accept a signal from the headphone output of the mixer for transmission back to the cell phone or headset.

A switch on either unit selects between connection to a 3rd party Bluetooth headset, or a cell phone.

JK BlueSet Wireless Headset Interface

JK Audio introduces the BlueSet™ series of intercom headset adapters using Bluetooth Wireless Technology*. These headset interfaces plug directly into most Party-Line (PL) belt packs, replacing the wired headset.

A 3.5 mm stereo headset jack contains a mic level output signal suitable for recording, with the beltpack headphone signal on the left channel, and the Bluetooth return signal on the right.

A switch selects between connection to a 3rd party Bluetooth headset or a cell phone.

JK Universal Host

Universal Host easily converts your IP or PBX telephone into a professional, affordable interview station. This desktop digital hybrid provides talk show quality caller audio from most telephone systems. Simply connect between your telephone handset and the base of your telephone.

The 16 bit USB audio CODEC allows stereo recording at up to 48 kHz sampling rate, with the talent voice on the left channel in full bandwidth, and the caller on the right. Play recordings from your computer directly into the phone system.

Universal Host PDF below

JK BluePack Wireless Interview Tool 

BluePack allows live man-on-the-street interviews through a cell phone equipped with Bluetooth Wireless Technology. This sleek belt pack provides a professional look and feel to field reporters and remote talent.

BluePack pairs to your cell phone like a Bluetooth wireless headset. This professional microphone preamp and powerful headphone amplifier make sure the message gets through. A 3.5 mm stereo line input jack allows recordings to be mixed into the broadcast.

The 3.5 mm stereo line output jack provides your full bandwidth microphone signal on the left channel and Bluetooth audio on the right channel. Like any phone call, live interviews are limited to 3.4 kHz voice bandwidth back to the station. This stereo output jack allows you to make a full bandwidth recording using your favorite recorder for transfer back at the station or over the web.

The stereo headphone output gives you a mix of the XLR microphone input, 3.5 mm input, and Bluetooth audio. This powerful ½ watt stereo headphone amplifier will cut through any crowd noise. BluePack also pairs to Bluetooth equipped sound cards and music players in full bandwidth stereo A2DP mode. 

JK BlueKeeper Wireless Audio Gateway 

BlueKeeper combines Bluetooth Wireless Technology with professional audio electronics in a convenient desktop design.

BlueKeeper pairs to your cell phone like a Bluetooth wireless headset. Simply connect your favorite microphone and headphones and enjoy an immediate improvement at both ends of the call. The professional microphone preamplifier provides a dramatic improvement in sound quality to the caller (or back to the station if you are away from the studio). The caller audio comes in loud and clear over the convenient front panel headphone jack.

Recording Interviews - BlueKeeper allows you to send mic and line level signals into your wireless phone while maintaining excellent separation between your voice and the caller. The stereo output jack on the back of the unit provides your voice on one channel (in full fidelity) and the caller’s voice on the other channel. Connect this jack to your sound card or recorder. It’s perfect for radio or podcast interview recordings. The balanced XLR output jack contains only the caller’s voice. Connect to your mixing console or even to a PA system for everyone to hear.

BlueKeeper also pairs to Bluetooth equipped sound cards and music players in full bandwidth stereo A2DP mode.

JK Innkeeper LTD Digital Hybrid

Plain and simple may be the best words to describe the new innkeeper LTD Digital Hybrid. Our simplest digital hybrid yet, innkeeper LTD allows you to send line level signals into the phone line while maintaining excellent separation between your voice and the caller. The balanced XLR output jack contains only the caller’s voice, making this the perfect companion to mixers, consoles, and PA systems that demand talk show quality audio from a phone line.

The digital hybrid connects audio signals to a standard analog telephone line without the transmit / receive crosstalk common to analog hybrids. Its Digital Signal Processor (DSP) continuously monitors both the phone line and audio signals to deliver excellent separation. This proprietary, dual-convergence echo canceller algorithm can achieve excellent separation, typically exceeding 50 dB, without any setup and without sending a noise burst down the line. While this may sound complicated, it’s all done automatically during every call.

An auxiliary telephone is only required to place outgoing calls. The auxiliary telephone is disconnected when you press the “Call” button, and reconnected when you press the “Drop” button. The “Remote” jack allows connection to a JK Audio Guest Module, allowing remote control and dialing without an auxiliary telephone.

Innkeeper LTD features Auto-Answer/Auto Disconnect for use in IFB and monitoring applications. Other applications include: telephone interviews, talk shows, church PA interface, and conference room full duplex applications. This simple design features recessed volume controls and no confusing DIP switches, yet works reliably on standard analog phone lines around the world.

The RA2 Rackmount accessory holds two innkeeper LTDs in a 1U rack space.

JK RemoteAmp Blue Wireless Headphone Amplifier

JK Audio combines Bluetooth Wireless Technology with professional audio electronics in a rugged new belt pack design.

RemoteAmp Blue allows IFB monitoring through a cell phone equipped with Bluetooth Wireless Technology. This is a listen only connection designed for voice IFB or full bandwidth stereo music listening.

RemoteAmp Blue pairs to your cell phone like any Bluetooth wireless headset. The line input jacks and separate volume controls allow wired operation in parallel with the Bluetooth connection. The XLR line level input accepts either a balanced mono signal, or a party line intercom feed (listen-only). The ½ watt, ¼” stereo headphone jack will cut through any crowd noise. Connect an IFB earpiece to the 3.5 mm earpiece jack for mono operation.

BluePack also pairs to Bluetooth equipped sound cards and music players in full bandwidth A2DP stereo mode.

JK RemoteAmp Three Portable Headphone Amplifier

RemoteAmp Three provides a listen only connection for IFB or full bandwidth audio monitoring. The XLR line level input accepts either a balanced mono signal or a one or two channel party-line intercom feed (listen-only). The XLR source switch selects between balanced input and intercom monitoring. The intercom mode allows RemoteAmp Three to work with one or two channel intercom systems, and provides separate volume controls for each channel.

The integrated speaker is disabled when headphones or earphones are connected. The ½ watt, ¼” headphone jack will cut through any crowd noise without distortion. Connect a mono IFB earpiece or stereo headphones to the 3.5 mm earpiece jack.

RemoteAmp Three is powered by one 9-volt alkaline battery. If intercom power is available on either pin 2 or 3 of the XLR jack, this power will automatically override the battery, but will not charge the battery.

JK RemoteMix4

RemoteMix 4 is a four channel field mixer and headphone amplifier.  More than just a field mixer, this is a communications interface.  RemoteMix 4 features a phone line hybrid and keypad, a PBX handset interface, and a cell phone interface. All this in a tough, portable unit that’s smaller than a lunch box. All-in-one is an understatement. These parts were designed to work together and save setup time in the field.  No need to send an engineer with patch cables. All the pieces work together in one reliable unit.

Radio - RemoteMix 4 was designed for live remotes. Use it as a phone line hybrid, calling into your studio talk show hybrid.  Use it as a front end mixer for your POTS, ISDN or IP codec. Use it with your laptop codec.

TV – RemoteMix 4 gives you the ultimate phone connectivity with four IFB feeds. Imagine being able to send and receive interview audio, and pull IFB out of any business phone system, even your cell phone.  More than a field mixer, this is a shoot saver.

Great Sound – Bass Boost adds some low end before sending the signal down the phone line.  A soft limiter prevents overdriving the phone line interfaces, while the mixer XLR output is pre-limiter (full range). Line level cue input to the headphones make RemoteMix 4 a perfect companion to your CODEC.

Bluetooth Wireless Technology - RemoteMix 4 will first attempt to connect in hands free mode to a cell phone. If this type of connection is not available, it will connect to any other product, such as a notebook or portable that allows a Bluetooth wireless connection. This wireless headphone mode offers a full audio bandwidth stereo connection.

Convenient 3.5 mm send and receive jacks for recording the show, or mixing in your MP3 player. Separate headphone level and source selection controls. Monitor just the clean mixer output, or the communication return plus the mix.

JK Innkeeper 1x Digital Hybrid

A number of new features have been added to the innkeeper 1x and 1rx digital hybrids:

1. New look, but the same common sense user interface.

2. Lower noise, better echo canceller performance.

3. RS-232 remote interface using simple ASCII protocol, cable included.

4. Now compatible with (optional) JK Audio model RIU-IP Remote Control, an IP

interface with a built in web server for remote control from your web browser.

5. FCC/UL/CE/RoHS marked for sales in Europe, C-tic / A-tic marked for Australia.

The innkeeper 1x gets audio in and out of analog telephone lines. Its excellent caller audio output does not exhibit the transmit/receive crosstalk common to analog hybrids. This makes innkeeper 1x perfect for radio or television talk shows, teleconferencing, or auto-answer IFB feeds.

We use a 16-bit DSP to monitor the phone line and audio signals continuously in order to deliver excellent separation. Our dual-convergence echo canceller algorithm can achieve excellent transhybrid loss, typically exceeding 50 dB, without any setup and without sending a burst of noise into the phone line.

From the front panel you can control on-hook/off-hook, and adjust headphone volume. Front panel LEDs display signal levels and option status. The Send and Caller Volume controls are hidden behind an access panel to discourage unauthorized "tweaking". Five feature switches are also hidden behind the access panel.

AGC (Automatic Gain Control) adjusts the caller volume to an average level. AGC will tame a loud caller, and boost a quiet caller or quiet long distance connection.

Caller Ducking drops the Caller output level by 9 dB whenever the host speaks. This keeps the host "in charge" of the show, automatically making sure the caller never overpowers the host by attempting to talk over the host's voice.

Press the "Presence" button and you'll get a richer sound from the caller's voice. This digital filter brings back some of the low-end lost in transmission.

The Test Tone generator sends a 1 kHz full level tone either down the phone line or out the Caller XLR jack. This tone represents the maximum level transmit into the phone line or out the XLR jacks. The Test Tone generator is not required for tuning the digital hybrid.

Auto-Answer simply answers on the first ring and disconnects at the end of the call. 

Brochure : http://www.jkaudio.com/assets/pdf/innkeeper_1x-1rx_datasheet.pdf

JK Innkeeper 2 Digital Hybrid

JK Audio RIU-IP

The RIU-IP is a remote control interface designed for the new innkeeper 1x, innkeeper 2, and innkeeper 4 digital hybrids. This unit contains a web server which allows the user to send and receive control data through their web browser. RIU-IP can be connected to the user's computer NIC card for direct control, to a switch or hub for network control, or to an ethernet port with internet access for control from anywhere in the world.

Remote Control Capabilities:

• On-Hook and Off-Hook
• Confirmation of Off-Hook on On-Hook transition per line.
• Place call on hold or release hold.
• Dial (number) (line).
• Set Auto-Answer and ring count.
• Start and stop Conference (innkeeper 2).
• Adjust transmit and receive level per line.
• Test tone start/stop per line.
• Address book upload/download.
• Master Send configuration.

Manual : http://www.jkaudio.com/assets/pdf/riu-ip_datasheet.pdf

JK PBXPort Digital Hybrid

PBXport is a professional digital hybrid capable of providing talk show quality caller audio from your PBX phone system. PBXport allows you to send mic or line level signals into your PBX telephone system while maintaining excellent separation between your voice and the caller. The balanced XLR output jack contains only the caller's voice allowing full duplex voice conferencing through the existing PBX phone system without fear of echo and feedback.

Manual : http://www.jkaudio.com/assets/pdf/user_guides/PBXport-1006w.pdf

JK Broadcast Host digital audio Hybrid. 

Broadcast Host is a low cost portable stand alone digital telephone hybrid for radio broadcast talkback applications. This unit can be used connected to a recording device for journalist interview situations or integrated into a on-air console for radio talkback shows. The high speed 16 bit DSP enables excellent separation between announcer and caller with the caller only signal available for program mix in the console.

Manual : http://www.jkaudio.com/assets/pdf/user_guides/Broadcast_Host-1006w.pdf    Set Up Guide : Pages 3-6

JK Guest Module 1

Guest Module 1 gives you remote access to the on-hook / off-hook and dial features of either the Broadcast Host or Innkeeper series digital hybrids.

This little time-saver gives you call control you simply can't get with an auxiliary telephone and a couple of switches. Connect Guest Module 1 using an 8 pin RJ45 modular cable. This cable provides remote power so there is no need for batteries or an external power pack. The Call button will flicker when a call comes in. Press this button to answer or place a call. The button will stay lit when a call is present. When you dial on-air, the tones go out on the line, and do not come back mixed with the dial tone or caller signal.

Manual : http://www.jkaudio.com/assets/pdf/user_guides/Guest_Module1-0606w.pdf

JK Innkeeper PBX digital audio Hybrid

Innkeeper PBX digital telephone hybrid allows the extension handset of an analogue or digital PABX to be used as the interface between your caller and the broadcasting studio console. Excellent for dedicated news booths and journalist offices where PABX extensions are readily available.

The on board DSP constantly monitors send and receive signals to provide maximum separation and best available quality.

Manual : http://www.jkaudio.com/assets/pdf/user_guides/innkeeper_PBX-1006w.pdf       Set Up Guide : Pages 3-6

JK Innkeeper 4 multi-line digital audio Hybrid

Innkeeper 4 provides four independent digital telephone hybrids in a 1RU of rack space making this unit ideal where multiple telephone lines need to be available simultaneously at the on air console. This allows the program presenter to have total control of all callers participating in the talkback session and new participants can be brought in and out as required.

Manual : http://www.jkaudio.com/assets/pdf/user_guides/innkeeper_2-4%201006w.pdf

JK Auto Hybrid

The Auto hybrid is a full duplex low cost hybrid for portable and fixed bi-directional conversations. Auto hybrid suits OB, public address and IFB applications. Small and powerful with auto answer feature this unit can belt pack of be contained in the 4 unit 1RU panel for conservation of rack space.

Manual : http://www.jkaudio.com/assets/pdf/user_guides/Auto_Hybrid-0606w.pdf

JK Celltap

Celltap allows you to connect the coms port of your mobile phone to a recording device. The headphone output allows you to monitor or connect a powered speaker for group or conference listening.

Manual : http://www.jkaudio.com/assets/pdf/user_guides/CellTap-0606w.pdf

JK Compac

JK Compac is a versatile portable interface enabling access to PSTN, PABX and mobile phones for Bi-directional conversations. Should be in every OB kit forthose days when nothing goes right.

Manual : http://www.jkaudio.com/assets/pdf/user_guides/ComPack-1006w.pdf

JK THAT2

THAT2 connects into the handset lead of any telephone and permits the sending or receiving of audio conversations. Ideal for monitoring or getting the highest quality audio down the telephone line.

Manual : http://www.jkaudio.com/assets/pdf/user_guides/THAT-2-0606w.pdf

JK DAP2

DAP2 allows a connection between you OB mixer and a mobile phone. Can be used as a reporters mobile phone interface or as a emergency OB connection when all else fails. A good box to have in your pocket at weekends.

Manual : http://www.jkaudio.com/assets/pdf/user_guides/DaptorTwo-0606w.pdf

JK DAP3

Daptor Three is a simple, professional audio interface using Bluetooth Wireless Technology. Like its predecessor Daptor Two, this new version allows balanced and unbalanced connections to your cell phone. While Daptor Two uses the 2.5mm headset jack, Daptor Three connects to your cell phone like any other Bluetooth Wireless Technology enabled headset. It will also connect to any other product, such as a laptop, that allows a wireless headset connection.

Daptor Three won the Radio World Cool Stuff and Radio Magazine Pick Hit awards at NAB2007. These will move quickly.

JK RAMP

RAMP is a battery operated one watt personal headphone amplifier with belt clip. The output level is separately adjustable to the on-off switch so battery conservation and level setting are not linked.

Manual : http://www.jkaudio.com/assets/pdf/user_guides/RemoteAmp-0606w.pdf

JK PUREFORMER

Pureformer is a stereo isolation transformer for devices such as PC sound cards where input devices are unknown and may have residual DC voltages causing hum loops.

Manual : http://www.jkaudio.com/assets/pdf/user_guides/Pureformer-0606w.pdf