Fishman FLUENCE User manual

Phase Invert Control with Push-Pull Potentiometer

Rev1.0

The Fluence Phase Invert Control enables a guitar to achieve the distinct tone of using two pickups “out-of-

phase” with each other. Engaging the pull-switch on the control pot inverts the phase/polarity of one pickup

relative to the other.

The rotary function of the pot can be wired several different ways to accommodate any control layout. The

three wiring options are a volume control, standard tone control, or reactive tone using the Fluence Tone

Reactor accessory.

A trim control is provided to fine adjust the volume blend between pickups when phase invert is engaged. This

allows dialing in the preferred sweet spot on guitars without separate pickup volume controls. The trim control

range is -2dB to +3dB with the middle position being 0dB (no change in level) for the pickup being phase

inverted.

Electrical Specifications

Power Source: 9-18Vdc

Current Consumption: 0.8mA @9Vdc

Input Impedance: 270k

Output Impedance: 2k

Volume/Tone Pot: 25k

Phase Invert Control with Push-Pull Potentiometer

Quick Reference - 3 Ways to Configure Potentiometer Rotary Function

.15uF

Solder

0.15uF

Capacitor

“154”

Tone

Reactor

Volume Standard

Tone

Reactive

Tone

Apply Solder to

Connect Pads

for Volume

Function

Phase Invert Control with Push-Pull Potentiometer - Connection Points, Controls, & Functions

Push-Pull Pot - Pull for Phase Invert

Volume/Tone IN

Volume/Tone OUT

Pickup Phase OUT

+9V-18V IN/OUT

Ground

Pickup Ground

Pickup Phase IN

Phase Invert Trim

Pot Function

Solder Pads

Note: All connections points (except the Pot Function Pads) are plated through-hole

style such that wires cab be inserted and soldered from either side.

1. Push-Pull Pot - The rotary function of the pot can be wired for several functions;

volume, standard tone control, and reactive tone control. (see diagrams for details)

Pulling up on the shaft engages the pickup phase invert feature. Pushing the shaft

down into the default position bypasses the phase invert.

2. Volume/Tone IN - Signal input for volume or reactive tone control. (Not used for

standard tone control.)

3. Volume/Tone OUT - Signal output for volume or reactive tone control. Main

connection for standard tone control.

4. Pickup Phase OUT - The pickup output from the phase select circuit.

5. +9V-18V IN/OUT - (+) DC Power / Battery input for inverter circuit. Two additional

connections are provided for convenient power distribution to active pickups.

6. Ground - Connection to main control cavity ground.

7. Pot Function Solder Pads - Solder pads for setting potentiometer control function.

Volume: Bridge pads with solder.

Standard Tone: Solder 0.15uF capacitor across pads. (see diagrams)

Reactive Tone: (Pads not used) Requires tone reactor accessory (see diagrams)

8. Phase Invert Trim - Fine gain adjustment for achieving preferred blend tone in

phase invert mode. Adjust to taste when using two pickups in combination. Range is -

2dB to +3dB.

9. Pickup Phase IN - Input for the pickup to phase selected.

10. Pickup Ground - Ground connection for the pickup input cable shield.

“224”

.22uF

25k

Phase Invert Control with Push-Pull Potentiometer

Basic Wiring Example - Phase Invert as Volume Control

Neck

Volume IN

Volume OUT

Bridge

Neck Pickup Bridge Pickup

Both

Output

Jack

9V Battery

Ring

Tip

Sleeve

(-)

(+)

Tone

Volume,

Pull for

Neck Pickup

Phase Invert

Neck Pickup Output

to Phase Inverter

Bridge Pickup Output

Neck +9-18V

Pickup

Voice-2

Wires

Pull for

Voice-2

Invert

Trim

Toggle Switch Style

Pickup Selector

Bridge +9-18V

Apply Solder to

Connect Pads

for Volume

Function

25k

Phase Invert Control with Push-Pull Potentiometer

Basic Wiring Example

Phase Invert as Standard Tone Control

Neck

Bridge

Neck Pickup Bridge Pickup

Both

Output

Jack

9V Battery

Ring

Tip

Sleeve

(-)

(+)

Neck Pickup Output

to Phase Inverter

Bridge Pickup Output

Bridge +9-18V

Neck

+9-18V

Pull for

Voice-2

Bridge Ground

Toggle Switch Style

Pickup Selector

“154”

.15uF

Pickup

Voice-2

Wires

Volume

Tone,

Pull for

Neck Pickup

Phase Invert

.15uF

Solder

0.15uF

Capacitor

as Shown.

Invert

Trim

25k

Phase Invert Control with Push-Pull Potentiometer

Basic Wiring Example

Phase Invert as Reactive Tone Control

Neck

Bridge

Neck Pickup Bridge Pickup

Both

Output

Jack

9V Battery

Ring

Tip

Sleeve

(-)

(+)

Neck Pickup Output

to Phase Inverter

Bridge Pickup Output

Pull for

Voice-2

Bridge Ground

Toggle Switch Style

Pickup Selector

Pickup

Voice-2

Wires

Volume

Tone,

Pull for

Neck Pickup

Phase Invert

Tone

Reactor

Neck

+9-18V

Bridge +9-18V

Invert

Trim

(-)

Push

25k

Log

Push-Pull

Pot

Pickup

OUT

VT-IN

Pot

Function

Solder

Pads

VT-OUT

GND

GND+9V IN/OUT

Pull for

Phase

Invert

(+)

Phase Invert

Trim

-2dB to +3dB

.047uF

Phase Control - Functional Diagram and Connections

(Standard Capacitor Value

for Reactive Tone Control)

25k

Log

.047uF

VT-IN

VT-OUT

(Not Used)

Tone Wire

0.15uF Capacitor “154”

for 0.2uF Total

Pot Wired for Standard Tone Control

0.15uF

25k

Log

.047uF

VT-IN

VT-OUT

Tone IN

Tone OUT

Pot Wired for Reactive Tone Control

Tone

Reactor

Fluence Phase Control with Push-Pull Potentiometer - Functional Schematic Diagrams

25k

Log

VT-IN

VT-OUT

OUT

Bridge with Solder

for Volume function.

(Located next to

trim pot)

Pot Wired for Volume Control

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