Fishman VTB Manuel utilisateur

www.ﬁshman.com

System Requirements

These instructions support installation with the

following systems:

• Fishman Acoustic Matrix Natural I &II—

between Rev. 4.0 and 6.0

• Fishman Powerjack—Rev. 2.3

• Martin Gold Plus—between Rev. 4.0 and 6.0

• Martin Active Jack—Rev. 2.3

Please note that revision numbers for each

pickup are printed on the circuit board inside

the endpin jack.

Do not attempt to install the VTB with

the discontinued Acoustic Matrix Natural

or the Acoustic Matrix Hot preamps or

similar versions of the Martin Gold Plus

systems. These systems can be identiﬁed

by the rectangular metal box that encases

the electronics.

Installation

Warning! Installation of the VTB is meant to be

performed only by a professional repairperson.

1. Locate the controls on the top of the instrument’s

shoulder, on the bass-side adjacent to the neck.

Check for interference with the internal structural

components, such as the neck block, the top braces

or the lining. When you choose a location, be aware

the VTB knobs must clear the interior lining of the

guitar case. The single-shaft control is for volume

and the dual shaft control is for bass (outer knob)

and treble (inner knob).

2. Reinforce the mounting area with a backing

strip of thin veneer glued to the inside of the

guitar. Use the included drilling template to size

the backing strip.

3. Fasten the template to locate 3⁄8” (9.5mm) holes.

VTB

INSTALLATION GUIDE

Fishman Acoustic Matrix and

Martin Gold Plus—Rev. 6.0:

1. Remove “000” jumper.

2. Thread cable assembly through barrel and solder

as indicated.

Fishman Acoustic Matrix and

Martin Gold Plus—Rev. 5.0, 5.3:

1. Remove the components from the endpin

preamp as indicated

2. Solder the new 2k resistor (supplied with your VTB)

to the preamp circuit board in place of the capacitor

3. Thread cable assembly through barrel and solder

as indicated.

Active Volume, Bass

& Treble Controls

for Fishman

Acoustic Matrix Natural I,

Acoustic Matrix Natural II

and Powerjack preamps.

www.ﬁshman.com 513-000-008 Rev B 11-06

Installation (continued)

4. Remove the endpin preamp and locate the

revision number on the circuit board. Follow the

soldering instructions that apply to the revision.

Warning: The surface-mount components on the

endpin preamp can be easily overheated with a hot

iron. Use only a low-wattage soldering iron and take

care not to overheat the components.

5. Fasten the VTB as shown:

Electrical Speciﬁcations

Typical current consumption@9Vdc: 0.85mA

Typical 9V alkaline battery life

with Acoustic Matrix preamp: 500 hours

Nominal output impedance: 1k Ohm

Recommended load impedance: 10k Ohm

and above

Signal gain (tone ﬂat, volume at maximum): 0dB (unity)

Maximum output level (1% THD@3kHz): +8dBV

Bass control (Outer shaft of dual pot):

±12dB@100Hz

Treble control (Inner shaft of dual pot):

±14dB@11kHz

Cable Color Code:

White: VTB Input Red : +9V

Black: VTB Output

Copper shield: +Ground

Because we continually make improvements to our

products, the speciﬁcations in this guide are subject

to change without notice.

1. Remove the components from the endpin

preamp as indicated

2. Solder the new 2k resistor (supplied with your

VTB) to the preamp circuit board

3. Thread cable assembly through barrel and solder

as indicated.

Fishman Acoustic Matrix and

Martin Gold Plus—Rev. 4.0:

1. Remove the “000” jumper from the endpin

preamp.

2. Thread cable assembly through barrel and solder

as indicated.

Fishman Powerjack and

Martin Active Jack—Rev. 2.3:

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