Polarity Inverter Cable — 4 in

Reverse Polarity Without Rebuilding Your Power Setup

The T-Rex Polarity Inverter Cable allows you to power compatible pedals that require the opposite DC polarity from your standard pedalboard power connection.

It sits between your existing power cable and the pedal, reversing the polarity while leaving the voltage unchanged.

When You Need It

Most modern guitar pedals use one common DC polarity standard.

Some pedals do not.

If a pedal requires inverted polarity, connecting it directly to a standard power cable may not work—and can potentially damage the pedal.

The Polarity Inverter Cable provides a simple way to adapt a compatible power connection without changing your entire power system.

How It Works

Connect the 2.1 mm female connector to your existing compatible power cable, then connect the 2.1 mm barrel plug to the pedal.

The adapter reverses the polarity of the connection.

It does not change voltage or increase available current.

Important: Verify Polarity First

Before connecting any pedal, confirm the manufacturer’s required:

• Voltage
• AC or DC
• Polarity
• Current requirement

Only use the Polarity Inverter Cable when the pedal specifically requires the opposite polarity from the power cable being used.

Connections

• Input: 2.1 mm female barrel connector
• Output: 2.1 mm barrel plug
• Length: 10 cm / 4 in
• Function: Reverses DC polarity

Power Budget

Polarity is one of the four basic things to verify before powering a pedal:

Voltage
AC or DC
Polarity
Available current

The connector may physically fit and the voltage may be correct, but the wrong polarity can still make the connection incompatible.

The Polarity Inverter Cable solves that specific problem without changing the rest of the power equation.

Specifications

• Product: Polarity Inverter Cable
• T-Rex part number: 10921
• Length: 10 cm / 4 in
• Connector: 2.1 mm barrel plug to 2.1 mm female barrel connector
• Function: DC polarity inversion
• Manufacturer: T-Rex Effects

The Right Connection for the Odd One Out

When one pedal on the board requires reverse polarity, you shouldn’t have to redesign the entire power system.

Same voltage. Same available current. Opposite polarity.