The headphone interface (FKH-IF) from Limex is a small and versatile box which can be mounted directly onto your instrument or is detachable mounted on the base righten. As power supply a LiPo battery (8000 mAh) is used. This LiPo is connected to the headphone interface via a small USB cable which is plugged into the micro USB port from the headphones interface. At the top side the headphone interface has a 6,3 mm headphone jack and two indication LED. One lights up green after power is switched on. If Midi signals are receives the green LED is flashing. The second LED is used for the optional wireless functionality. This button will then switch on the wireless system which is indicated by a blue led.
Headphone interface is used for:
- Powering the Midi Electronic inside your instrument
(midi system or microphone system) - Headphone operation
- Wireless operation

Wireless Operation (optional):
There are two options to play wireless with an headphone interface. First is to directly assemble a Limex Wireless System into the headphone interface or you can use a Limex-bug plugged into the headphone jack. The headphone jack has a built in automatic which detects if a wireless system (mono) or a headphone (stereo) is plugged in and switches the output accordingly. Also the output level is set automatically to fit the attached device
Please be aware that, if you are using a bag transmitter with our headphone interface, the used transmitter has no power at the headphone jack.
Headphone Interface Use

Technical Specifications
Audio output: | stereo, mono |
Power supply: | sender + 5 V DC USB |
Temperature range: | 10 to 40°C |
Humidity: | max. 80%, not condensing |
Supplied
![]() Transmitter Complete |
![]() Battery Power Bank |
![]() USB Wire |
![]() Instruction Manual |
Optional Accessories
![]() Charging Adapter Set |
![]() Battery Power Bank |