User manual FISHMAN PREFIX

[. . . ] Choose the flattest possible location for the preamp on the side of the instrument. The flattest and most comfortable location for the player is often at the upper bout, just above the instrument's waist and well below the shoulder. Note that the bezel has a limited ability to bend just enough to conform to the curved sides of most standard sized instruments. CAUTION! [. . . ] Apply masking tape around the endblock area to protect the instrument. Locate an X-Acto saw 1/16" (1. 6 mm) away from the body and saw off the endpin, nearly flush to the instrument. Centerpunch a guide hole in the trimmed endpin. Drill a 1/8" (3. 2 mm) pilot hole through the endpin and endblock. Line up 15/32" (11. 9 mm) Spade bit in the pilot hole and begin drilling. Maintain a perpendicular plunge in relation to the instrument. Use steady (but not heavy) pressure, especially as the drill exits inside the guitar. To avoid damage to the instrument, let the drill come to a complete stop before removing it from the hole. Red Wire Shield to to Tip Sleeve II - Cut Out the Preamp Cavity Preliminary Warning: The Prefix preamp will only fit in guitars with a clearance of at least 2 1/4" (57. 15 mm) between the top and back braces, at the point where the preamp chassis swings inside the instrument. Soundboard Minimum 2. 250" (57. 15 mm) Clearance between Top and Back Braces Back Jack Connections for Prefix and Prefix Plus models: · Red wire to Tip (short terminal) · Black wire to Switch (longest terminal) · Shield wire to Sleeve (strain relief) · Ring is not connected (middle terminal) Black Wire to Switch Red Wire Shield to to Tip Sleeve FISHMAN PREFIXTM SERIES PREAMP INSTALLATION - CONTINUED IV - Install the Endpin Jack Follow this sequence when installing the endpin jack: 1. Strap button 1 23 4 5 6 7 Battery Compartment Pull the small tab at the top of the Prefix toward you. The body of the preamp will swing out, revealing the battery compartment. Observe the polarity marks on the battery clip and install a fresh 9V alkaline battery accordingly. 9 Volt Battery Microphone Trim Control A small circular potentiometer is located on the underside of the preamp just below the battery compartment. This is a "set it and forget it" control. Use it to initially calibrate the microphone balance in relation to the pickup. Set the Blend slider to the center position and with a small slotted screwdriver, adjust the Trim Control until both the microphone and pickup levels are balanced to your taste. Fit the jack so that the larger diameter threads will sit slightly below the surface, on the outside of the endblock. After fitting the small dress washer and the dress nut over the end of the jack, insert a 3/32" (or 2 mm) Allen wrench (or suitably sized screwdriver or rod) through the cross drilled hole on the end of the jack. Tighten the dress nut with a 1/2" open end wrench while holding the jack in place with the allen wrench. [. . . ] Replace the foil trap door by gently tucking it back into the preamp, just below the battery clip. Angle the preamp 90° from the bezel and insert it in the cut-out. Fasten the preamp bezel using the four self-tapping screws and the two plastic backing plates. Self-Tapping Screws MONO CABLE STEREO "Y" CABLE If you wish to split the pickup and microphone signals for separate external processing (such as with a Fishman Blender TM system), move the switch to the Stereo position and use a stereo cable or a stereo "Y" cable to carry the two signals to separate destinations. [. . . ]