Thinline Gold+Plus Acoustic Pick Up System



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Installation Instructions

Installation Instructions

Martin Thinline Gold+Plus

Natural I & Natural II

Acoustic Sound Reinforcement System

martinguitar.com







measures more than 50% of the total height of the saddle,

balance and/or output level of the pickup may suffer. In these

cases, add a hardwood shim under the pickup. To determine the

shim's thickness, subtract 1/2 of 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:

Many Martin guitars will have adequate down-bearing on the

saddle, even when there is less than 50% of the saddle height

appearing above the slot. This is due to the close proximity of the

bridge pins to the saddle slot. These guitars will generally perform

very well and you may disregard the 50/50 rule.



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.

1. Rout a .094" (2.38 mm) wide slot.

2. Be certain that the bottom of the slot is flat. Deepen an existing

slot only enough to obtain a clean, flat surface.



Locate the Wire Hole

1. Locate the center of the wire hole no less 

than .100" (2.54 mm) from the closest string.

2. Mark the location where the wire will 

enter the saddle slot. Center the mark 

between the walls (width) of the slot.

4

Installation Instructions

 






8

Pickup & Electret Microphone

(Use with the Fishman Blender System)

Note: Before you install a microphone, check the Manufacturer’s specific

wiring instructions (color coding).

Pickup Signal

to IN pad

Microphone Shield

to Ground (”G”)

Microphone Signal

to Ring (”R”)

Zener

Diode

Figure 5

Ground

Front View

Rear View

Remove

1.8K Resistor

Figure 6

Additional Tone and Volume Controls

Installation Instructions

Pickup Shield

to Ground (”G”)


Gold+Plus

®

Fasten the Jack in the Endpin Hole

Follow the above sequence when installing the endpin jack:

The jack should protrude at least 

5

/



16

" (7.9 mm) and no more than

11

/

32



" (8.7mm) outside the guitar's body for proper fit.

Fit the small dress washer and nut over the end of the jack, then

insert a 

3

/



32

" Allen wrench through the small hole on the end of

the jack. Tighten the 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 will snap securely in place. 

Attach the Battery Clip

We recommend that you attach the battery clip to a small piece of

hardwood approximately 1 

1

/



2

" x 1 


1

/

2



" x 

1

/



2

" (4cm x 4cm x

1.1cm) thick. Mark the screw hole locations on the block using

the battery holder as a template. Drill the screw holes using the

5

/

64



" (2mm) drill. Attach the battery holder using the two supplied

1

/



4

" screws. Attach this assembly to the inside front block (neck

block) using either wood glue or a gap filling cyanoacrylate such

as Loctite

®

Black Max™.



1 - Preamp/Shielding Cap

2 - 1st Large Hex Nut

3 - 2nd Large Hex Nut

4 - Large Dress Washer

5 - Star Washer

6 - Guitar End Block

7 - Small Dress Washer

8 - Small Dress Nut

9 - Strap Button

9



Important! Although the supplied battery holder should provide

adequate capacity to grip the battery at all times, we strongly

recommend that you remove the battery when shipping your

instrument.  FAILURE TO REMOVE BATTERY COULD RESULT IN

DAMAGE TO YOUR INSTRUMENT. C. F. Martin & Co., Inc. will

not be held responsible for any damage incurred to instruments

from a loose battery. A set of adhesive backed clips has been

provided to secure the pickup cable and battery leads inside the

guitar once the endpin jack has been installed. Remove the plastic

film from the back of each clip to expose the adhesive. Secure the

cable/clips to the kerfed lining of the guitar.

10

Specifications

Power Supply:

9 Volt Alkaline battery

Battery Life:

Natural I - 6,000 hours

Natural II - 6,000 hours

Maximum Output Voltage: 4V peak to peak

Output Impedance:

Less than 5k Ohm

Signal-to-Noise Ratio

94 dB


Discrete Component Design: FET low noise class A

input stage, bipolar class

AB output stage

All specifications subject to change without notice.



Troubleshooting

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.

Remove debris from saddle slot

Improper saddle fit (too tight or loose).

Make sure that the saddle has a sliding fit in the slot

Not enough downbearing pressure on saddle.

Follow the 50/50 rule.

Uneven or belly up saddle slot.

Sculpt the bottom of the saddle to compensate for 

depth differences in the saddle slot or re-rout the saddle slot.

Wire hole too tight.

The wire hole must be .094" diameter.



Pickup binding in saddle slot. The saddle slot must be .094” . 

Rout the slot to the correct width.



Thin or weak signal

Weak downbearing pressure due to low string break angle.

Observe the 50/50 rule. Ramp the string slots if necessary.

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.

Fasten the Shielding Cap to the jack.

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.

TROUBLESHOOTING



Installation Instructions

 


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