inside J48C


Inside J48C, contact microphone C1 Original, C2 or C3, wheel or volume button option


Thank you for purchasing a system ISCHELL. We are delighted to welcome you to the growing number of world-renowned music, technician, audio engineers and artist users who have chosen to use our systems.

We are at your disposal and we will always remain so over time, for any question relating to the use of our systems on your instrument. Your complete satisfaction is a priority for us. Consult the online help and contact us if necessary.

  • Your model inside J48C is equipped with a C1, C2 or C3 contact microphone developed by the brand ISCHELL in order to reproduce with the greatest fidelity the acoustics of your instrument, the attack, the timbre, the woody color, your playing and your playing nuances, without the problems of feedback and without picking up the sounds which surround you. Our hybrid Air / Contact technology works without a filter between the membrane and the soundboard of your instrument. We thus reproduce on a reduced and isolated scale an aerial sound recording, controlled by the immediate environment of our specific putty audio adhesive.
  • The sound is comparable to an aerial microphone, fidelity, warmth, width, air… With the acoustic insulation and the feedback resistance of a cell allowing high levels face / returns. You can easily use it in an amp, apply effects or make clean loops. A revolution in the amplification of many instruments on stage! An innovation ISCHELL !
  • All our products are manufactured and assembled in France by hand, with awareness and respect for a job well done, only with high quality components, for products that we hope will bring you satisfaction for many years on stage, in the studio and at each of your performances amplified.
  • You made the right choice, the model inside J48C Installs fixedly in the instrument with a required 12mm hole. The installation is therefore discreet and practical. It also has a volume wheel option to be attached to the edge of a gill or vent with Velcro, or a volume knob on a small removable media or with drilling. It adapts to many instruments ...
  • For advanced users, use in balanced mode with operation on phantom power is possible.
  • We strongly recommend that you take a few minutes to read this manual. Indeed, it is important to respect a few principles in order to benefit simply and quickly from these new systems.

What you need to know

  • Wash your hands before kneading the putty and carefully clean the bonding areas before doing your tests, they must be dry, non-greasy, clean and smooth.
  • You will find two doses of audio adhesive putty with your system. A white and a gray, they do not have the same sound. Carefully read the instructions for preparing the different contact microphones.
  • Original C1 contact microphone preparation page
  • C2 and C3 contact microphones preparation page
  • Use only the audio adhesive putty ISCHELL ! Any other putty will distort the quality of the sound.
  • The electronics contained in the socket Jack is fragile. Operate delicately to act on the low cut. A small pointed object is needed to operate the switches.
  • The use of the low cut is not compulsory and depends on the instruments. The 360Hz cut-off is the default position for acoustic instruments, your system is delivered to you in this position. However, if after finding the best mic placement you are running low on bass width, then try 180Hz (Mid Position) or Flat (Full Bandwidth).
  • This system is like your instrument, it is fragile. Never pull on the cables, always remove the microphone delicately from your instrument by taking it by the shell and gently tilting it while removing the putty, to avoid a too sudden suction effect (fragile membrane) and to preserve the surface of your instrument.
  • Operation on 9v battery can provide approximately 500 hours of use. Roughly calculate your hours to determine the changdefinitely. If the level drops, changez 9v battery as soon as possible.
  • Plugging in the jack activate 9v battery. Unplug it as soon as possible to preserve it.
  • Volume wheel option to be fixed with a Velcro scratch at the edge of a gill or a vent. Particularly suitable for guitars ...
  • Volume button option on a small removable media. Does not require drilling the instrument. Particularly suitable for harps ...
  • Volume knob option with instrument drilling. Particularly suitable for Koras, N'gonis, Harp ...
  • For advanced users: Your system can operate on phantom power, the 9v battery does not wear out, and provide a balanced signal using a balanced link cable fitted with a Jack stereo on the instrument side and an XLR socket on the amplification side available here. This mode of use requires your WARNINGSYou must first plug in the Jack then then use the XLR to plug in / unplug. Indeed, when you plug in or unplug a Jack, short circuits occur which could be damaging to the preamps when phantom power is turned on. Ischell cannot be held responsible in the event of a problem related to this mode of use.

Internal low cut Jack :

  • Open the Jack Like on the photo. A small switch is inside allowing three 180Hz / 360Hz / Flat positions.
  • The two switches on the left cut the bass below 360Hz (maximum cutoff).
  • To have all the bandwidth (Flat), push the bottom switch to the right (the top one stays on the left).
  • The 180Hz position is obtained by putting the top switch on the right (the bottom one remains on the left).
  • A drawing represents these positions on the cover of the Jack


After-Sales Service

  • Our products are guaranteed against any manufacturing defect for 2 years from the date of purchase.
  • We are at your disposal and we will always remain so in time for any question relating to the use of our systems on your instrument.
  • Your complete satisfaction is a priority for us. Consult the online help and contact us if you cannot find the solution to your problem.
  • Refer to the CGV on for more information on the warranty.


ISCHELL MICROPHONES  119 impasse de la gare – 44800 Saint-Herblain – FRANCE

Tel: +33 (0)6 62 09 54 91 – Email:

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