Introduction
The Keeley 1962X is a limited edition 2-Mode British Overdrive pedal designed to deliver a wealth of classic Bluesbreaker tones. This pedal expands upon the original 1962 model by introducing an additional high-headroom mode. It is crafted for guitarists seeking versatile overdrive with distinct tonal characteristics.
The 1962X features two distinct clipping modes: the standard KT66 mode and the more forceful KT88 mode, which utilizes MOSFET clipping for higher output and a meatier sound. This manual will guide you through understanding and utilizing these features to enhance your sound.

Figure 1: The Keeley 1962X 2-Mode Limited British Overdrive pedal. This image displays the pedal's top-down view, highlighting its control knobs for Gain, Boost, and Treble, along with the footswitch and the toggle switch for selecting between KT66 and KT88 modes.
Safety Information
- Power Supply: Use only a regulated 9V DC power supply with a center-negative polarity. Using an incorrect power supply can damage the pedal and void the warranty.
- Environment: Do not expose the pedal to extreme temperatures, high humidity, water, or direct sunlight. Operate in a dry, stable environment.
- Cleaning: Disconnect power before cleaning. Use a soft, dry cloth. Do not use liquid cleaners or solvents.
- Servicing: Do not attempt to open or service the pedal yourself. Refer all servicing to qualified Keeley Electronics personnel.
- Placement: Place the pedal on a stable surface to prevent accidental falls. Ensure proper ventilation if used in an enclosed pedalboard.
Setup
- Power Connection: Connect a standard 9V DC (center-negative) power supply to the power input jack on the pedal.
- 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's input or the next pedal in your signal chain using a standard 1/4-inch instrument cable.
- Initial Settings: For first use, set all knobs (Gain, Boost, Treble) to the 12 o'clock position. Ensure the toggle switch is set to the KT66 mode.
Operating the 1962X
Controls
- GAIN Knob: Controls the amount of overdrive and distortion. Turning it clockwise increases the saturation and sustain.
- BOOST Knob: Adjusts the overall output volume of the pedal. Use this to match levels with your bypassed signal or to provide a volume boost for solos.
- TREBLE Knob: Shapes the high-frequency content of your tone. Turn clockwise for brighter tones, counter-clockwise for warmer, darker tones.
- MODE Toggle Switch (KT66/KT88): Selects between the two distinct overdrive modes.
Modes of Operation
The 1962X offers two unique clipping characteristics, selectable via the toggle switch:
- KT66 Mode: This is the standard mode, providing the classic performance and gain range found in the original Keeley 1962 pedal. It offers a spectrum from mild, light breakup to full saturation, ideal for blues and classic rock tones.
- KT88 Mode: In this mode, a MOSFET transistor is engaged in the clipping stage. This results in a higher output, a more forceful, focused, and
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