Introduction
The Caline CP-12 Pure Sky Overdrive is a versatile guitar effect pedal designed to deliver a range of tones from pristine clean boost to smooth, compressed overdrive. This pedal is engineered to preserve the original timbre of your amplifier while adding rich harmonic content.
What's in the Box
- 1 Caline CP-12 Pure Sky OD Effect Pedal
- 1 Instruction Manual
Key Features
- Pure and Clean Overdrive: Provides a highly pure and clean overdrive, sustaining the original amplifier timbre.
- True Bypass: Minimizes tone loss when the effect is disengaged.
- Durable Construction: Features a full metal case and a sturdy stomp switch for reliability.
- Versatile Tone Control: Volume and Gain controls allow for sounds ranging from clean boost to hard rock overdrive.
- Power Requirement: Operates with a negative center 9-Volt DC power supply (not included).
Controls and Connections
The Caline CP-12 Pure Sky pedal features four control knobs and standard input/output jacks.

This image displays the top view of the Caline CP-12 Pure Sky pedal. It features four black control knobs with white indicators: 'VOL' (Volume), 'GAIN', 'TREBLE', and 'BASS'. The pedal has a bright blue casing with "Pure Sky" written in script and "OVERDRIVE" at the bottom. Input and output jacks are on the sides, along with a DC 9V power input.
- VOL (Volume): Adjusts the overall output level of the effect.
- GAIN: Controls the amount of overdrive or distortion. Lower settings provide a clean boost or subtle grit, while higher settings introduce more pronounced overdriven tones.
- TREBLE: Adjusts the high-frequency response of the tone.
- BASS: Adjusts the low-frequency response of the tone.
- IN (Input Jack): Connect your guitar or previous effect pedal here.
- OUT (Output Jack): Connect to your amplifier or next effect pedal.
- DC 9V (Power Input): Connect a 9-Volt DC negative center power supply.
- Footswitch: Engages or disengages the effect. The LED indicator will light up when the effect is active.
Setup
- Power Connection: Connect a standard 9-Volt DC negative center power supply (not included) to the DC 9V input jack.
- Input Connection: Connect your guitar to the 'IN' jack of the pedal using a standard 1/4-inch instrument cable.
- Output Connection: Connect the 'OUT' jack of the pedal to your amplifier's input using a standard 1/4-inch instrument cable.
- Initial Settings: Start with the 'VOL' and 'GAIN' knobs at their minimum positions, and 'TREBLE' and 'BASS' at the 12 o'clock (neutral) position.
Operating Instructions
- Engaging the Effect: Press the footswitch to activate the overdrive effect. The LED indicator will light up.
- Adjusting Gain: Slowly increase the 'GAIN' knob to introduce overdrive. Start with lower settings for a clean boost or subtle grit, and increase for more pronounced overdriven tones.
- Setting Volume: Adjust the 'VOL' knob to achieve the desired output level, balancing it with your amplifier's clean tone.
- Tone Shaping: Use the 'TREBLE' and 'BASS' knobs to fine-tune the tonal characteristics. Turning clockwise increases the respective frequencies, while turning counter-clockwise decreases them.
- Disengaging the Effect: Press the footswitch again to bypass the effect. The LED indicator will turn off.
Maintenance
- Cleaning: Use a soft, dry cloth to clean the pedal's exterior. Avoid abrasive cleaners or solvents.
- Power Supply: Always use a regulated 9-Volt DC negative center power supply to prevent damage.
- Storage: Store the pedal in a dry, cool environment away from direct sunlight and extreme temperatures when not in use.
- Cable Care: Ensure all instrument cables are in good condition to prevent signal loss or noise.
Troubleshooting
| Problem | Solution |
|---|---|
| No sound when pedal is active. | Check power supply connection and ensure it's 9V DC negative center. Verify all cables are securely connected. |
| Weak or distorted sound. | Check guitar and amplifier volume settings. Ensure 'VOL' and 'GAIN' knobs are adjusted appropriately. Test with different cables. |
| Excessive noise or hum. | Use a high-quality, regulated power supply. Ensure proper grounding. Check for interference from other electronic devices. |
| LED not lighting up. | Verify power supply connection and functionality. The pedal may not be receiving power. |
Specifications
| Feature | Value |
|---|---|
| Model | CP-12 |
| Brand | Caline |
| Effect Type | Overdrive |
| Power Requirement | 9V DC (Negative Center) |
| Current Draw | Approximately 5mA |
| Dimensions | 11.5 x 6.5 x 5.5 cm (4.5 x 2.5 x 2.1 inches) |
| Weight | 274g (9.7 ounces) |
| Bypass | True Bypass |
| Material | Full Metal Case |
Warranty and Support
For warranty information or technical support, please refer to the official Caline website or contact your authorized dealer. Keep your purchase receipt as proof of purchase.
Product Images

A clear front view of the Caline CP-12 Pure Sky pedal, highlighting the Volume, Gain, Treble, and Bass control knobs. The bright blue casing and "Pure Sky" branding are visible.

An angled perspective of the Caline CP-12 Pure Sky pedal, showcasing the input, output, and DC 9V power jacks on the sides, along with the footswitch and control knobs.

The bottom plate of the Caline CP-12 Pure Sky pedal, displaying regulatory marks (CE, RoHS, FC) and power input specifications (INPUT: DC9V).
Official Product Video
Watch the official product demonstration video for the Caline Pure Sky Overdrive Pedal.
This video provides an overview and demonstration of the Caline Pure Sky OD Guitar Pedal Effect CP-12, showcasing its features and sound capabilities.