1. Product Overview
The JOYO King of Kings R-20 is a dual-channel crunch pedal designed to offer versatile overdrive tones. It comes bundled with a JOYO DC 9V 500mA Pedal Power Adapter for optimal performance and noise reduction. This pedal features independent controls for each channel, allowing for a wide range of tonal possibilities.
Image: The JOYO King of Kings R-20 pedal is shown, highlighting its dual-channel design, effectively functioning as two independent pedals within one unit. Each channel has its own set of controls.
2. Setup Instructions
2.1 Power Connection
Connect the included JOYO DC 9V 500mA Pedal Power Adapter to the pedal's DC 9V input jack. Ensure the adapter is a tip-negative 9V power supply to prevent damage and minimize noise. The adapter features Smart IC chips for over-current, over-temp, over-voltage, and over-circuit protection.
Image: The JOYO DC 9V 500mA Pedal Power Adapter is displayed, illustrating its safety features including over-current, over-temp, over-voltage, and over-circuit protection. The cord length is 150cm/4.92ft.
Image: A close-up of the JOYO DC 9V 500mA Pedal Power Adapter, detailing its specifications (DC 9V 500mA, 100-240V 50-60Hz) and showing the tip-negative polarity. It is compatible with most brands of pedals.
2.2 Guitar and Amplifier Connection
Connect your guitar to the INPUT jack on the pedal. Connect the OUTPUT jack of the pedal to your amplifier. Ensure all connections are secure to prevent unexpected noise.
Image: A diagram illustrating the wide compatibility of JOYO pedals with various brands of effect pedals and keyboards, including BOSS, Donner, JHS, VOX, MXR, ammoon, Ibanez, Muslady, and Xotic.
3. Operating Instructions
3.1 Dual Channel Operation
The King of Kings R-20 features two independent channels, each with its own Volume, Gain, and Tone knobs. This allows you to achieve a variety of tones, from subtle crunch to heavier overdrive. The channels can be used independently or in series for stacked gain effects.
Image: The JOYO King of Kings R-20 pedal is shown, illustrating how two independent overdrive circuits combine into a single dual-channel pedal, emphasizing its versatility.
3.2 Control Knobs
- VOL (Volume): Adjusts the output level of each channel.
- GAIN: Controls the amount of overdrive/crunch for each channel.
- TONE: Shapes the tonal character, from darker to brighter sounds.
Image: A close-up of the JOYO King of Kings R-20 pedal, highlighting the Volume, Gain, and Tone knobs for Channel B, with descriptive labels for each control.
3.3 Clipping Diodes Switches
Each channel features two independent clipping diodes switches (labeled '1' and '2' or 'ON' and 'CLIP'). These switches allow you to select different clipping characteristics, altering the distortion texture and response.
- Switch 1 (Diode Clipping): Engages diode clipping for a more distorted sound. This may result in a slight decrease in volume.
- Switch 2 (Feedback Circuit): Engages a feedback circuit for an overdrive effect.
Image: A close-up of the JOYO King of Kings R-20 pedal, illustrating the '1' (Diode Clipping) switch. Turning it on provides a more distorted sound, potentially with a slight volume decrease.
Image: A close-up of the JOYO King of Kings R-20 pedal, illustrating the '2' (Feedback Circuit Dipping) switch. Turning it on engages an overdrive effect.
3.4 Video Demonstration
Video: A detailed review and demonstration of the JOYO R-Series King of Kings R-20 Dual Channel Overdrive pedal, showcasing its features and sound capabilities.
Video: A tonal exploration of the JOYO King of Kings R-20 pedal, demonstrating various settings and sounds achievable with the dual-channel overdrive.
4. Specifications
- Input Impedance: 1MΩ
- Output Impedance: 1KΩ
- Working Current: 20mA
- Working Voltage: DC 9V (center minus)
- Item Weight: 0.92 lb / 14.67 ounces
Image: The JOYO King of Kings R-20 pedal is shown with its physical dimensions: 13cm/5.12in (length), 11cm/4.33in (width), and 5cm/2in (height). Key specifications are also listed.
5. Maintenance
To ensure the longevity and optimal performance of your JOYO King of Kings R-20 pedal, keep it clean and free from dust. Avoid exposing the pedal to extreme temperatures, humidity, or direct sunlight. Use a soft, dry cloth for cleaning. Do not use abrasive cleaners or solvents.
6. Troubleshooting
- No Sound: Check all cable connections (guitar to input, output to amp). Ensure the power adapter is correctly connected and functioning. Verify that the pedal is engaged (LEDs on).
- Excessive Noise: Ensure you are using a regulated, isolated 9V DC (center negative) power supply. Unplug and re-plug all cables to ensure secure connections.
- Pedal Not Engaging: Check if the footswitches are functioning correctly. Ensure the power supply is adequate.
7. Warranty and Support
For warranty information and technical support, please refer to the official JOYO website or contact your authorized JOYO dealer. Keep your purchase receipt as proof of purchase for any warranty claims.
