Fishman PREFIX - PREAMP INSTALLATION GUIDE REV 4 Installation Manual page 2

F
ISHMAN
P I
REAMP NSTALLATION
IV - Install the Endpin Jack
Follow this sequence when installing the endpin jack:
1. Large hex nut
2. Large dress washer
3. Star washer
4. Guitar end block
5. Small dress washer
6. Small dress nut
7. Strap button
Fit the jack so that the larger diameter threads will sit slightly below the surface, on the out-
side 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. Thread and hand tighten the
strap button.
NOTE: With the strap button in place, the end of the jack should protrude
slightly, so that when a plug is inserted, it can snap securely in place.
V - Mount the Preamp
1. Insert the pickup in the saddle slot (follow specific installation instructions as out-
lined for the Acoustic Matrix pickup).
2. Carefully pull back the foil "trap door" on the preamp (located next to the output
cable) to expose the terminal block.
Preamp
Battery Case
Trap
Door
Slot
Preamp
Foil Sheilding
Control Panel
3. Punch through the perforated slot in the trap door with the pickup wire and thread it
through the foil.
4. Insert the hot pickup wire (inner conductor) in the left side of the terminal block,
marked "IN".
5. Insert the pickup ground wire (shield) in the right side of the terminal block, marked
"GND".
6. Tighten down the screws on the top of the terminal block with a 2.4mm (3/32") slot
head screwdriver.
7. Replace the foil trap door by gently tucking it back into the preamp, just below the
battery clip.
8. Angle the preamp 90° from the bezel and insert it in the cut-out.
9. Fasten the preamp bezel using the four self-tapping screws and the two plastic
backing plates.
Plastic Backing Brackets
To keep the wires inside the guitar from rattling, secure them with the included adhesive
backed clips. Attach the wire guide clips to the sides or the kerfed lining of the instrument.
P ™ S
REFIX ERIES
- C
ONTINUED
1 2 3 4
Terminal
Block
Trap Door
Pulled Back
Preamp
Control Panel
Self-Tapping Screws
Soundboard
Battery Compartment
Pull the small tab at the top of the Prefix
5 6 7
toward you. The body of the preamp will
swing out, revealing the battery com-
partment. Observe the polarity marks on
the battery clip and install a fresh 9V
alkaline battery accordingly.
Microphone Trim Control
A small circular potentiometer is located on the underside of the preamp just below the bat-
tery compartment. This is a "set it and forget it" control. Use it to initially calibrate the micro-
phone 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.
Mono/Stereo Switch
A small slide switch, located on the underside of the preamp (across from the Notch control
pot), lets you choose between mono and stereo operation. Leave the switch in the Mono posi-
tion when you use a standard instrument cable.
MONO
MIC
If you wish to split the pickup and microphone signals for separate external processing (such
as with a Fishman Blender ™ 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. In the
stereo mode, the pickup goes to the tip output and the microphone sits on the ring output.
Phone 978-988-9199 • Fax 978-988-0770 www.fishman.com
9 Volt Battery
STEREO / MONO
Microphone
Trim Control
STEREO
Microphone & Pickup
Signals
MONO CABLE
F T
I S H M A N R A N S D U C E R S
340-D Fordham Road Wilmington MA 01887 USA
Stereo / Mono
Switch
MIC
Tip Ring
Pickup Microphone
STEREO "Y" CABLE
®
009-087-007 • Rev 4 • 11-19-07