---
product_id: 191145891
title: "Mr.Power Reverse Polarity Converter Cable 5.5 X 2.1 for Keyboard Guitar Effect Pedal (2 pcs)"
brand: "mr.power"
price: "€ 15.07"
currency: EUR
in_stock: true
reviews_count: 13
category: "Mr.Power"
url: https://www.desertcart.be/products/191145891-mr-power-reverse-polarity-converter-cable-5-5-x-2
store_origin: BE
region: Belgium
---

# Fits keyboards & guitar pedals Reverse polarity conversion 5.5x2.1mm jack size Mr.Power Reverse Polarity Converter Cable 5.5 X 2.1 for Keyboard Guitar Effect Pedal (2 pcs)

**Brand:** mr.power
**Price:** € 15.07
**Availability:** ✅ In Stock

## Summary

> 🔄 Power your gear your way — no more polarity puzzles!

## Quick Answers

- **What is this?** Mr.Power Reverse Polarity Converter Cable 5.5 X 2.1 for Keyboard Guitar Effect Pedal (2 pcs) by mr.power
- **How much does it cost?** € 15.07 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/191145891-mr-power-reverse-polarity-converter-cable-5-5-x-2)

## Best For

- mr.power enthusiasts

## Why This Product

- Trusted mr.power brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Durable Design:** Coaxial cable with sturdy plastic housing ensures long-lasting indoor use.
- • **Dual Pack Value:** Two cables included to power multiple devices or keep a spare on hand.
- • **Reliable Power Swap:** Reverses polarity effortlessly, saving you from costly proprietary adapters.
- • **Compact & Convenient:** 173mm length fits perfectly in tight setups without cable clutter.
- • **Universal Compatibility:** Seamlessly adapts standard power supplies to nonstandard polarity devices like keyboards and guitar pedals.

## Overview

The Mr.Power Reverse Polarity Converter Cable (5.5 x 2.1mm) is a compact, reliable solution designed to convert power polarity for keyboards and guitar effect pedals. This dual-pack cable enables standard power supplies to work with devices requiring reversed polarity, saving users from expensive proprietary adapters. With a 173mm length and durable coaxial construction, it’s perfect for professional musicians and tech-savvy creatives seeking hassle-free power connectivity.

## Description

desertcart.com: Mr.Power Reverse Polarity Converter Cable 5.5 X 2.1 for Keyboard Guitar Effect Pedal (2 pcs) : Musical Instruments

Review: Use a standard power supply with nonstandard electronics - Needed this for a Casio keyboard, bought in a thrift shop with no power cord. I have lots of 'em with the right voltage, but Casio uses a nonstandard polarity (presumably to make us buy their proprietary power cord). This adapter changed my standard polarity cord to fit their keyboard. Worked great and saved me $20!
Review: ESSENTIAL for tape recorder power unit - I bought a tape recorder that didn't come with external power, and the one I had fit just fine, but still didn't work because polarity was backwards. Thus: this perfect little device swaps tip to ring within the barrel connector, and seamlessly lets me proceed with using the same power device for multiple units. EXCELLENT; SIMPLE; PERFECT solution!

## Features

- One male plug and one female plug
- Reverse Polarity what you want, fit for keyboard and guitar effect pedal
- Jack Size: 5.5mmx2.1mm
- Length: 173mm
- 2pc Effect Pedal Cable

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07YJKJY7C |
| Best Sellers Rank | #4,809 in Musical Instruments ( See Top 100 in Musical Instruments ) #150 in Instrument Cables |
| Brand | Mr.Power |
| Brand Name | Mr.Power |
| Cable Type | Coaxial |
| Color | Black |
| Compatible Devices | PC |
| Connector Gender | Male-to-Female |
| Connector Type | Male-to-female |
| Customer Package Type | sealed anti-static bag |
| Customer Reviews | 4.7 out of 5 stars 390 Reviews |
| Indoor Outdoor Usage | Indoor |
| Item Shape | Round |
| Manufacturer | Mr.Power |
| Model | MP-RPC-5521-2 |
| Number of Items | 2 |
| Number of Pins | 2 |
| Other Special Features of the Product | Low Voltage |
| Outer Material | Plastic |
| Part Number | Reverse Polarity Converter Cable |
| Recommended Uses For Product | Connecting guitar effect pedals to amplifiers or keyboards to power supplies |
| Special Feature | Low Voltage |
| Unit Count | 1 Count |

## Product Details

- **Brand:** Mr.Power
- **Cable Type:** Coaxial
- **Compatible Devices:** PC
- **Connector Type:** Male-to-female
- **Special Feature:** Low Voltage

## Images

![Mr.Power Reverse Polarity Converter Cable 5.5 X 2.1 for Keyboard Guitar Effect Pedal (2 pcs) - Image 1](https://m.media-amazon.com/images/I/41Ke6H0swzS.jpg)
![Mr.Power Reverse Polarity Converter Cable 5.5 X 2.1 for Keyboard Guitar Effect Pedal (2 pcs) - Image 2](https://m.media-amazon.com/images/I/51Xbq9ichzL.jpg)
![Mr.Power Reverse Polarity Converter Cable 5.5 X 2.1 for Keyboard Guitar Effect Pedal (2 pcs) - Image 3](https://m.media-amazon.com/images/I/51DCPj3KfHL.jpg)
![Mr.Power Reverse Polarity Converter Cable 5.5 X 2.1 for Keyboard Guitar Effect Pedal (2 pcs) - Image 4](https://m.media-amazon.com/images/I/6122xcUuR9L.jpg)
![Mr.Power Reverse Polarity Converter Cable 5.5 X 2.1 for Keyboard Guitar Effect Pedal (2 pcs) - Image 5](https://m.media-amazon.com/images/I/61bjpaMyONL.jpg)

## Available Options

This product comes in different **Number Of Items** options.

## Questions & Answers

**Q: Does it work with 9 volts**
A: I use it for 9 volts. Works great!

**Q: Is this cable also the right size for 12Volt battery pack?**
A: The plug size is 5.5 x 2.1mm. 
If your device has the same plug size, it can fit for.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Use a standard power supply with nonstandard electronics
*by K***Z on February 4, 2026*

Needed this for a Casio keyboard, bought in a thrift shop with no power cord. I have lots of 'em with the right voltage, but Casio uses a nonstandard polarity (presumably to make us buy their proprietary power cord). This adapter changed my standard polarity cord to fit their keyboard. Worked great and saved me $20!

### ⭐⭐⭐⭐⭐ ESSENTIAL for tape recorder power unit
*by J***J on October 19, 2023*

I bought a tape recorder that didn't come with external power, and the one I had fit just fine, but still didn't work because polarity was backwards. Thus: this perfect little device swaps tip to ring within the barrel connector, and seamlessly lets me proceed with using the same power device for multiple units. EXCELLENT; SIMPLE; PERFECT solution!

### ⭐⭐⭐⭐⭐ Works to reverse polarity on cameras
*by C***S on November 2, 2025*

Worked great with Panasonic convertible cameras

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*Product available on Desertcart Belgium*
*Store origin: BE*
*Last updated: 2026-08-02*