Voltage Doubler Cable — 22 in

Combine Two Isolated Outputs for Higher Voltage

The T-Rex Voltage Doubler Cable combines two compatible isolated power-supply outputs to provide a higher-voltage connection for pedals that require more than a single output can provide.

For example, two compatible 9V isolated outputs can be combined to supply 18V to a pedal designed to operate at 18V.

The 22 in cable length provides additional reach for larger pedalboards and more flexible power-supply placement.

How It Works

Connect the two input plugs to two isolated power-supply outputs, then connect the remaining plug to your compatible pedal.

The cable combines the voltage from the two outputs into one higher-voltage connection.

Important: This Doubles Voltage, Not Current

The Voltage Doubler Cable increases the available voltage by combining two isolated outputs.

It does not function like a Current Doubler.

For example:

9V + 9V = 18V

or

12V + 12V = 24V

The connected pedal must be specifically designed to accept the resulting voltage.

Isolated Outputs Required

Voltage doubling requires two isolated power outputs.

Do not use this cable with two outputs that share a common electrical ground unless the power-supply manufacturer specifically confirms that configuration is appropriate.

Extra Reach for Larger Pedalboards

At 22 in, this version gives you additional cable length when your power supply and pedal are positioned farther apart.

It is particularly useful when:

• Your power supply is mounted underneath the pedalboard
• The pedal sits farther from the available power outputs
• You need to route the cable around other pedals or hardware
• A short adapter would create unnecessary strain at the connection points

Power Budget

Before connecting your pedal, verify:

Voltage
AC or DC
Polarity
Current requirement

The Voltage Doubler changes the voltage supplied to the pedal, so confirming the pedal’s allowable input voltage is especially important.

Never supply a pedal with a higher voltage than the manufacturer specifies.

Connections

• Inputs: 2 × 2.1 mm barrel plugs
• Output: 1 × 2.1 mm barrel plug
• Cable length: 22 in
• Function: Combines two isolated power outputs to double voltage

Specifications

• Product: Voltage Doubler Cable
• T-Rex part number: 10911
• Length: 22 in
• Connector size: 2.1 mm
• Function: Voltage doubling
• Type: Pedalboard power cable
• Manufacturer: T-Rex Effects

When Your Pedal Needs More Voltage

If your power supply has the correct isolated outputs but your pedal requires a higher operating voltage, the T-Rex Voltage Doubler Cable provides a simple way to make that connection.

Two isolated outputs. Higher voltage. More reach.