Keeley Compressor Plus Pedal User Manual

Introduction

The Keeley Compressor Plus is an advanced compression pedal designed for guitarists seeking enhanced sustain, dynamic control, and tone shaping. Building upon Keeley's extensive experience in compression, this pedal offers intuitive controls including a unique Release Switch optimized for single-coil or humbucker pickups, a versatile Tone Control, and a Blend Control to mix compressed and dry signals. It is engineered to provide professional-grade compression, limiting, and sustain, making your instrument stand out in any mix.

Image: Banner displaying "COMPRESSOR PLUS" with a partial view of the pedal.

Safety Information

Use only a 9V DC center-negative power supply (not included) with a minimum of 10mA current. Incorrect power supply can damage the unit and void the warranty.
Do not expose the pedal to water, excessive moisture, or extreme temperatures.
Avoid dropping the pedal or subjecting it to strong impacts.
Do not attempt to open or service the pedal yourself. Refer all servicing to qualified personnel.
Keep out of reach of small children.

Setup

Follow these steps to set up your Keeley Compressor Plus pedal:

Power Connection: Connect a 9V DC center-negative power supply to the power input jack on the side of the pedal. The pedal requires at least 10mA.
Input Connection: Connect your guitar or other instrument to the INPUT jack on the right side of the pedal using a standard 1/4-inch instrument cable.
Output Connection: Connect the OUTPUT jack on the left side of the pedal to your amplifier or the next pedal in your signal chain using a standard 1/4-inch instrument cable.
Initial Settings: For a good starting point, set the SUSTAIN, LEVEL, BLEND, and TONE knobs to the 12 o'clock position. Set the Release Switch (SINGLE COIL/HUMBUCKER) according to your guitar's pickup type.

Image: Front view of the Keeley Compressor Plus Pedal, showing all controls and jacks.

Operating the Pedal

The Keeley Compressor Plus features intuitive controls for shaping your tone:

Image: Diagram of the Keeley Compressor Plus Pedal with numbered controls for easy identification.

1. SUSTAIN Knob: Controls the amount of compression and sustain. Turning it clockwise increases the sustain and compression effect.
2. BLEND Knob: Mixes the compressed signal with your original dry signal. Turn clockwise for more compressed signal, counter-clockwise for more dry signal. This allows for parallel compression, preserving attack and dynamics.
3. Release Switch (SINGLE COIL/HUMBUCKER): This toggle switch adjusts the release time of the compressor.
- SINGLE COIL: Optimized for single-coil pickups, providing a faster release.
- HUMBUCKER: Optimized for humbucker pickups, providing a slower release.
4. LEVEL Knob: Adjusts the overall output volume of the pedal. Use this to match the volume with the pedal bypassed or to provide a boost.
5. TONE Knob: A unique tone control that emphasizes or subdues sensitive harmonics that can be affected by compression. Turn clockwise for brighter tones, counter-clockwise for darker tones.
6. Footswitch: Engages or bypasses the effect. The LED indicator above the SUSTAIN knob illuminates when the effect is active.

Usage Tips:

Experiment with the BLEND knob to find the perfect balance between compressed sustain and natural attack.
Adjust the TONE knob to compensate for any perceived tonal changes due to compression, or to add sparkle.
The Release Switch is crucial for optimal performance; ensure it matches your pickup type for the best dynamic response.

Maintenance

Cleaning: Use a soft, dry cloth to clean the pedal. Do not use abrasive cleaners or solvents.
Storage: Store the pedal in a cool, dry place away from direct sunlight and extreme temperatures when not in use.
Power: Disconnect the power supply when the pedal is not in use for extended periods to prolong its lifespan.

Troubleshooting

Problem	Possible Cause	Solution
No sound when pedal is engaged.	Incorrect power supply, faulty cables, incorrect connections.	Verify 9V DC center-negative power supply. Check all cables for damage and ensure they are securely connected to the correct input/output jacks.
Excessive noise or hum.	Ground loop, noisy power supply, high gain settings.	Use an isolated power supply. Reduce SUSTAIN and LEVEL settings. Ensure proper grounding of all equipment.
Sound is too squashed or unnatural.	Sustain knob set too high, Blend knob setting.	Reduce the SUSTAIN knob setting. Adjust the BLEND knob to introduce more dry signal. Ensure the Release Switch matches your pickup type.

Specifications

Model: KCompPlus
Dimensions: 6.75 x 4.25 x 3.25 inches (approximate)
Weight: 10.6 ounces (approximate)
Power Requirement: 9V DC Center-Negative, 10mA minimum
Signal Format: Analog
Hardware Interface: 1/4-inch Audio Input/Output
Color: Black

Warranty

Keeley Electronics products are built to the highest standards and are covered by a limited warranty against defects in materials and workmanship. For specific warranty terms and conditions, please refer to the official Keeley Electronics website or contact their customer support directly. Keep your proof of purchase for warranty claims.

Support

For further assistance, technical support, or service inquiries, please contact Keeley Electronics through their official channels:

Official Website: Visit the Keeley Electronics website for FAQs, product registration, and contact information.
Customer Service: Refer to the contact details provided on the official website for direct support.

Image: Logo for Keeley Electronics.

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Keeley KCompPlus