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AG-Series
Passive Acoustic Guitar Pickup
Includes Installation Instructions for Models
AG-125
.125” (3.2 mm) Width • 2.125” String Spacing
AGX-125
.125” (3.2 mm) Width • 2.3125” String Spacing
AG-094
.094” (2.3 mm) Width • 2.125” String Spacing
AGX-094
.094” (2.3 mm) Width • 2.3125” String Spacing
Installation Guide
Installation Guide
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Thank you for choosing the classic AG Series undersaddle pickup. Please read these instructions carefully. For technical assistance, contact Fishman Customer Support at
997788--998888--99666655
oorr tteecchh@@ffiisshhmmaann..ccoomm
The AG-Series is our original string-sensitive, piezo-ceramic undersaddle pickup. It provides
natural acoustic reproduction of your guitar with an explosive attack well-suited for percussive
playing styles. The pickup senses individual string vibrations with six fully shielded piezo elements. Installation is straight forward and you can plug the AG-Series pickup directly into an
instrument amplifier with great results. For improved performance we recommend one of our
dedicated outboard preamps.
Included with each AG pickup is our versatile Switchjack stereo endpin jack, which enables you
to wire up the AG pickup with another pickup or a microphone for outboard stereo blending
applications.
CHOOSING THE RIGHT MODEL TRANSDUCER
Before installation, be sure to select the right pickup for your instrument.
AG-125
E to E string spacing = 2.125" (54.0 mm)
Wire hole location = .234" (5.9mm) from closest outside string
The AG-125 is suitable for most instruments
with string spacings from 2.075" (52.7 mm) to
2.175" (55.3 mm)
AGX-125
E to E string spacing = 2.3125" (58.7 mm)
Wire hole location is .234" (5.9mm) from closest outside string
The AGX-125 is suitable for most 6 and 12string instruments with E to E string spacings
from 2.262" (57.4 mm) to 2.362" (59.9 mm)
NOTE: Custom string spacings are available
upon request.
WIDTH: .125" (3.2 mm)
HEIGHT: .048" (1.22 mm)
LENGTH: AG-125: 2.625" (66.67 mm)
AGX-125: 2.725" (69.22 mm)
AG-094
E to E string spacing = 2.125" (54.0 mm)
Wire hole location = .234" (5.9mm) from closest outside string
The AG-094 is suitable for most instruments
with string spacings from 2.075" (52.7 mm) to
2.175" (55.3 mm)
AGX-094
E to E string spacing = 2.3125" (58.7 mm)
Wire hole location is .234" (5.9mm) from closest outside string
The AGX-094 is suitable for most 6 and 12string instruments with E to E string spacings
from 2.262" (57.4 mm) to 2.362" (59.9 mm)
NOTE: Custom string spacings are available
upon request.
WIDTH: .094" (2.3 mm)
HEIGHT: .048" (1.22 mm)
LENGTH: AG-094: 2.625" (66.67 mm) /
AGX-094: 2.725" (69.22 mm)
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AG Series -
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Passive Guitar Pickup
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PREPARATION
Tools
• Caliper • Router with 1/8" (3mm) Straight Bit (single flute)
• 400 Grit Sandpaper or Scraper • Soldering Iron (30 watt max)
• Rosin Core Solder • Wire Strippers
• Masking Tape • X-Acto Saw
• Variable Speed Drill • Center Punch
• 1/8" Twist Drill • 15/32" Spade Bit Drill
• 1/2" Open End Wrench • 3/32" Allen Wrench
MECHANICAL FACTORS AFFECTING PICKUP PERFORMANCE
Break Angle
For the pickup to perform optimally, there should be a 20° (minimum) string break
angle across the back of the saddle. An adequate break angle can be realized by
"ramping" the string slots. In extreme cases, where the break angle is less than
20°and the saddle is so low that it is nearly flush with the top of the bridge, the
instrument probably requires a neck re-set. In these cases, re-setting the neck to a
higher angle will restore the saddle height and the string break angle required for
good pickup performance.
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Installation Guide
Installation Guide
IIMMPPOORRTTAANNTT
Installation of the AG Series Acoustic Guitar Pickup requires fine woodworking & soldering
skills and should be performed only by a qualified repairman. Fishman Transducers will not be
responsible for any damages that may result from improper installation.
Please read these instructions carefully. For technical assistance, contact Fishman
Customer Support at 978-988-9665 or tech@fishman.com.
If you are new to under saddle piezo installations, a comprehensive guide, The Finer Points of
Piezo Installation by Ken Parker, is available at www.fishman.com.
Handle the pickup carefully! Mishandling may result in ground hum or intermittent signal.
Fishman Transducers will not be responsible for any damages to the pickup that may occur
due to misuse or poor installation.
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Mechanical Factors Affecting Pickup Performance - Continued
The 50/50 Rule
We have found that there is a critical relationship between the overall saddle height
and the bridge slot depth. For adequate mechanical coupling and pickup balance,
we recommend that the saddle slot depth (with pickup installed) measures no more
than 50% of the total height of the saddle. If the slot measures more than 50% of
the total height of the saddle, balance and/or output level may suffer. In these
cases, add a hardwood shim under the pickup. To determine the shim's thickness,
subtract ½ the total saddle height from the slot depth, then remove an equal amount
of material from the bottom of the saddle.
Exception to the 50/50 Rule: Pickups in bridges (especially Martin style 3/32" width) with
exceptionally steep string break angle will generally perform well, even if the saddle slot depth
measures more than 50% of the total saddle height.
PREPARATION
I • Prepare the Saddle Slot
A large percentage of string balance problems with undersaddle pickups can be
traced to an unevenly cut or warped saddle slot. Irregularities on the bottom or
sides of the slot can often prevent the saddle from uniformly pressurizing the pickup.
For this reason, we strongly recommend that before you install any undersaddle
pickup, re-mill an existing slot with a plunge router, jigged up in an appropriate slot
cutting fixture.
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Passive Guitar Pickup
NO MORE THAN 50%
R
AM
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1. Rout a .125" (3.2 mm) or .094 (2.3 mm)
wide saddle slot.
2. Be certain that the bottom of the slot is
FLAT. Deepen an existing slot just
enough to obtain a clean, flat surface.
II • Locate the Wire Hole
The location of the wire hole is critical to the performance to the AG-125 / AG-094
as it determines the correct position of the piezo elements relative the strings.
1. Locate the center of the wire hole .234" (5.9 mm) from the closest outside string.
(Or center of the closest pair of outside strings for 12-string models.)
2. Mark the location where the wire will enter the saddle slot. Center the mark
between the walls (width) of the slot. Drill a .09375"(2.4mm) hole.
3. Clear wood chips and foreign materials from the saddle slot
4. Carefully insert the pickup. The wire must slip easily into the wire hole. The pick-
up must fit into the slot without friction or binding.
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Installation Guide
Installation Guide
.234"
(5.9 mm)
.234"
(5.9 mm)
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III • Prepare the Saddle
We highly recommend the Fishman Cleartone™ saddle for enhancing the performance of the AG-Series pickup. We also suggest synthetic materials such as
Micarta or Corian as adequate substitutes. Organic materials such as bone or ivory
can not be recommended since these are not structurally as consistent as synthetics and can produce poor string to string balance through the pickup.
1. Prepare a .125" or .094" wide saddle. Make sure the bottom of the saddle is
FLAT.
2. Remove only enough material from the width of the saddle to provide a sliding fit
in the slot. To test the fit, the saddle should slide easily in the slot, but should not
fall out when overturned. To maintain your current action, the new saddle must
be .048" shorter in height than your current saddle.
IV • Prepare the Endblock
There are two ways to widen the endpin hole to accept the endpin jack:
Slow and Safe
If you have the time, this is the preferred way to enlarge the endpin hole. Remove
the endpin and widen the hole to size with a 15/32'" (11.9mm) reamer, available in
the US & Canada through Stewart Macdonald, 800-848-2273, part #4323.
OR
Quick & Clean
The objective here is to drill out the hole with the endpin or other suitable plug in
place. You may remove a loose endpin and refasten it in the endblock with cyanoacrylate glue before starting the procedure.
Note: We do not recommend this method for instruments with brittle ornamental veneers (ex: abalone) around the endblock.
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Passive Guitar Pickup
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1. Apply masking tape around the endblock area to protect the instrument.
2. Locate an X-Acto saw blade 1/16" (1.6mm) away from the body and saw off the
endpin.
3. Centerpunch a guide hole in the center of the trimmed endpin.
4. Drill a 1/8" (3.2mm) pilot hole through the endblock.
5. Line up a 15/32" (11.9mm) 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.
6. To avoid damage to the instrument, let the drill come to a complete stop before
removing it from the hole.
V - Install the Pickup
1. Insert the pickup in the slot and then strip and tin the wire ends.
2. Unscrew the shielding cap on the jack to expose the solder terminals. Thread
the pickup wire through the shielding cap.
Gently bend back the strain relief/sleeve tab to gain better access to the Tip ter-
minal.
3. Solder the pickup "hot" wire to the Tip terminal, which is the shortest of the three
tabs.
Solder the pickup shield to the ground tab on the jack. Gently tighten the strain
relief.
4. Refasten the shielding cap to the jack.
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Installation Guide
Installation Guide
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Wiring Options with the Fishman Switchjack
The Switchjack T-R-S-S (Tip/Ring/Sleeve/Switch) stereo switching endpin jack
allows simultaneous stereo operation and battery switching for active pickups. This
new configuration simplifies stereo wiring with many pickup combinations that were
once incompatible.
To gain better access to the Tip, Ring and Switch terminals, gently bend back the
Strain Relief/Sleeve tab, before you begin to solder.
Pages 9 & 10 illustrate the various wiring options made possible by the Switchjack.
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AG Series -
AG Series -
Passive Guitar Pickup
Passive Guitar Pickup
Shield
Tip
(Short Terminal)
Ring
TipGuitar Sleeve
1/4" Stereo Plug
Switch
(Long Terminal)
Ring
(Medium Terminal)
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Pickup Signal
to Tip
Shield to
Sleeve
Pickup Signal
to Tip
2nd Pickup
to Ring
Common
Ground
Mono Wiring an AG Series Pickup
Mono Wiring an AG Series Pickup
Stereo Wiring a Second Pickup to an AG Series Pickup
Stereo Wiring a Second Pickup to an AG Series Pickup
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Installation Guide
Installation Guide
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Passive Guitar Pickup
Negative Battery Wire
to Switch
Pickup Signal
to Tip
2nd Pickup
to Ring
Common
Ground
Stereo Wiring with an Active Pickup
Stereo Wiring with an Active Pickup
Common
Ground
Pickup Signal
to Tip
Microphone to Ring
Zener Diode
between Ring & Sleeve
Adding a Microphone to an AG Series Pickup
Adding a Microphone to an AG Series Pickup
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Installation Guide
Installation Guide
VI - Fasten the Jack in the Endpin Hole
Follow this sequence when installing the endpin jack:
1 - Shielding Cap
2 - First Large Hex Nut
3 - Large Dress Washer
4 - Star Washer
5 - Guitar Endblock
6 - Small Dress Washer
7 - Small Dress Nut
8 - Strap Button
The jack should protrude at least 5/16" and no more than 11/32" outside of the guitar body for proper fit.
After fitting the small dress washer and nut over the end of the jack, insert the 3/32"
allen wrench through the small hole on the end of the jack. Tighten the nut with the
1/2" open end wrench while holding the jack in place with the allen wrench. Thread
and hand tighten the the strap button.
Note: With the strap button in place, the end of the jack
should protrude slightly to allow proper plug fit.
PLUGGING IN
Due to the nature of passive pickups, the type of cable you use and the input you
plug into will affect the quality of your sound.
Instrument Cable
Cable lengths over 10 feet (before preamp) will cause audible high frequency loss.
Use a high quality, low capacitance shielded cable. This will ensure minimal tone
coloration and hum. Using fully shielded metal plugs will also help eliminate hum.
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Passive Guitar Pickup
Kinds of Audio Inputs
Because of the lack of standardization for high impedance audio inputs, special
attention should be paid to what you are plugging into:
The AG-125 / AG-094 will sound best when plugged directly into an input with a 10
MOhm impedance; the full frequency response of the instrument is reproduced.
The AG-125 / AG-094 can also be plugged into inputs as low as 1 MOhm with
adequate results; the bass frequencies will be slightly rolled off.
Preamps
We strongly recommend using a 10 MOhm, impedance matching, buffered preamp
in conjunction with the pickup.
A matching preamp will:
1. Realize the full frequency response potential of the pickup.
2. Permit long cable runs (after the preamp) without signal deterioration.
3. Allow precise volume and tone shaping with dedicated EQ.
4. Ensure compatibility with virtually any instrument level audio input available.
Fishman Transducers manufactures a complete line of compatible
preamps, all with 10 MOhm inputs:
POWERJACK - Miniature Endpin Preamp
MODEL GII & BII - Outboard Acoustic Instrument Preamp
AGP-2 - Onboard Instrument Preamp
PRO-EQ II - 4 Band Acoustic Instrument Preamp
PRO-EQ PLATINUM - Outboard Acoustic Instrument Preamp / EQ / D.I.
DUAL PARAMETRIC D.I. - Fully Parametric Two Band Preamp / D.I.
ACOUSTIC / BASS BLENDER - 2 Channel Pickup / Mic Preamp
POCKET BLENDER - 2 Channel Pickup/Mic Preamp
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Installation Guide
Installation Guide
Musical Instrument Amplifiers
Most musical instrument amplifiers (at least 1 M
W
input impedance) will yield
useable results. Acoustic instrument amplifiers have a 10 M
W
Piezo input, ideally
matching the pickup.
Direct Boxes
You can plug the AG-125 / AG-094 into an "active" direct box (1 - 10 M
W
input) with
very good results. Using a passive direct box will sound weak and thin.
PA / Recording Consoles
Professional PA and recording consoles have a much lower input impedance than
what is acceptable for the AG-125 / AG-094 ; you will need an impedance matching
preamp. Plugging a passive piezo pickup into a mixer without an impedance
matching preamp will sound harsh and thin.
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SYMPTOM CAUSE SOLUTION
WEAK
STRING OR
STRINGS
Saddle is not
completely seated.
Push the saddle down
over the weak strings.
Bottom of saddle is uneven
or out of square with its sides.
Check bottom of saddle for
flatness and squareness.
Debris in the saddle slot.
Improper saddle fit
(too tight or loose).
Saddle material.
Not enough downbearing
pressure on saddle.
Uneven or belly up
saddle slot.
Wire hole too tight.
Pickup binding in saddle slot.
Remove debris
from the saddle slot.
Make sure that the saddle has
a sliding fit in the slot.
Do not use bone, ivory
or other organic materials
for the saddle material.
We recommend synthetic
materials such as Corian,
Micarta, and Tusc.
Follow the 50/50 rule.
Sculpt the bottom of the saddle
to compensate for depth
differences in the saddle slot
or re-rout the saddle slot.
*
The wire hole must be
.093" diameter.
The saddle slot must be
.125" wide. Rout the slot
to the correct width.
* See Ken Parker's The Finer Points of Piezo Installation.
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ROUBLESHOOTING
ROUBLESHOOTING
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SYMPTOM CAUSE SOLUTION
HIGH
FREQUENCY
LOSS
Instrument cable too long.
Use 10' or shorter
instrument cable before
your amplifier
THIN OR
WEAK
SIGNAL
Weak downbearing pressure
due to low string break angle.
Observe the 50/50 rule. Ramp
the string slots if necessary.
Impedance mismatch
(see PLUGGING IN section).
Match the pickup to the audio
input with a buffer-preamp.
HUM
Improper saddle fit (too tight,
resulting in poor s/n ratio).
Check saddle for
sliding fit in the slot.
Torn pickup shield.
Examine the pickup. Replace
pickup if the material is torn.
Unshielded jack.
Poorly shielded
instrument cable.
Fasten the Shielding Cap
to the jack.
Use only fully shielded
instrument cables.
PICKUP
INTERMITTENT
OR DEAD
Pickup binding in wire hole (wire
hole too small
or misaligned).
Align or widen
pickup wire hole.
Pickup binding in saddle slot.
Widen or lengthen pickup
saddle slot to accommodate
the pickup.
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ROUBLESHOOTING
ROUBLESHOOTING
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The FISHMAN Switchjack™ Equipped AG Series Acoustic Guitar Pickup is
warranted to function for a period of One (1) Year from the date of purchase. If the
unit fails to function properly within the warranty period, free repair and the option
of replacement or refund in the event that FISHMAN is unable to make repair are
FISHMAN’s only obligations. This warranty does not cover any consequential
damages or damage to the unit due to misuse, accident, or neglect. FISHMAN
retains the right to make such determination on the basis of factory inspection.
Products returned to FISHMAN for repair or replacement must be shipped in
accordance with the Return Policy, as follows. This warranty remains valid only if
repairs are performed by FISHMAN. This warranty gives you specific legal rights
and you may also have other rights which may vary from state to state.
Return Policy
To return products to FISHMAN TRANSDUCERS, you must follow these steps...
1. Call FISHMAN TRANSDUCERS at 978-988-9199 for a Return Authorization
Number (“RAN”).
2. Enclose a copy of the original Bill of Sale as evidence of the date of purchase,
with the product in its original packaging and a protective carton or mailer.
3. FISHMAN TRANSDUCERS’ technicians will determine whether the item is
covered by warranty or if it instead has been damaged by improper customer
installation or other causes not related to defects in material or workmanship.
4. Warranty repairs or replacements will be sent automatically free of charge.
5. If FISHMAN TRANSDUCERS determines the item is not covered by warranty, we
will notify you of the repair or replacement cost and wait for your authorization to
proceed.
F
ISHMAN
T
RANSDUCERS
340-D Fordham Road Wilmington MA 01887 USA
Phone 978-988-9199 • Fax 978-988-0770
www.fishman.com
3-00 • 009-010-001
Limited Warranty
Limited Warranty
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