1. Introduction
The DOUBLE OS1 Resonance Pickup On-board Preamp is an innovative system designed to enhance your guitar's acoustic sound. It features SFT (Same Frequency Trans) technology, which drives the guitar body to resonate, increasing frequency response and making the sound more resonant, solid, and dynamic. This preamp also includes built-in Reverb, Chorus, and Delay effects, along with Bluetooth 5.0 connectivity for practice accompaniment. It utilizes a dual-pickup system combining a piezo pickup and a microphone to capture and enrich every detail of your playing.
2. Package Contents
Please check the package carefully to ensure all items are present:
- 1 x OS1 Resonance Pickup On-board Preamp Unit
- 1 x End-Pin Jack
- 1 x Vibrating Horn
- 1 x Pickup Wire
- 1 x Type-C Charging Cable
- 2 x Mounting Clips
- 1 x User Manual (this document)
3. Product Overview
The DOUBLE OS1 preamp features an intuitive control layout and robust connectivity options.
Controls and Interfaces:
- Controller: Main rotary knob for volume and menu navigation.
- Dial LED Lamp: Visual indicator for various functions and levels.
- Indicator: Status light.
- Type-C Interface: For high-speed charging.
- BT (Bluetooth): Button/indicator for Bluetooth connectivity.
- AUX: Auxiliary input for external audio sources.
- Reverb: Effect control button.
- Chorus: Effect control button.
- Delay: Effect control button.
- Mic: Microphone input/control.
- Input/Output Ports: Standard audio input and output connections.
4. Setup and Installation
Important Note: This is an on-board preamp that requires opening holes in your guitar for proper installation. Professional installation is recommended.
Installation Steps:
- Prepare Guitar: Carefully mark and cut the necessary openings on your guitar body for the preamp unit and end-pin jack.
- Install End-Pin Jack: Secure the end-pin jack into its designated hole.
- Connect Pickup Wire: Connect the pickup wire from your guitar's internal pickup to the preamp unit.
- Install Vibrating Horn: Mount the vibrating horn inside the guitar body, ensuring good contact for optimal resonance.
- Mount Preamp Unit: Secure the main preamp unit into the prepared opening on the guitar body using the provided clips or appropriate fasteners.
- Initial Charge: Before first use, fully charge the preamp using the Type-C cable.
Charging the Battery:
The OS1 preamp is equipped with a 2000mAh rechargeable lithium battery. To charge:
- Connect the provided Type-C cable to the Type-C interface on the preamp.
- Connect the other end of the cable to a suitable USB power source (e.g., computer, USB wall adapter).
- The indicator light will show charging status (refer to product for specific light behavior).
- A full charge significantly increases the charging rate by 50% compared to standard charging.
5. Operating Instructions
Power On/Off:
The main Controller knob likely serves as the power switch. Rotate or press the Controller knob to power the unit on or off.
Adjusting Effects:
- Reverb: Press the 'Reverb' button to activate/deactivate the reverb effect. Rotate the Controller knob to adjust the reverb level.
- Chorus: Press the 'Chorus' button to activate/deactivate the chorus effect. Rotate the Controller knob to adjust the chorus level.
- Delay: Press the 'Delay' button to activate/deactivate the delay effect. Rotate the Controller knob to adjust the delay level.
Bluetooth Connectivity (BT5.0):
- Press and hold the 'BT' button until the indicator light flashes, indicating pairing mode.
- On your mobile device, search for 'DOUBLE OS1' (or similar name) in the Bluetooth settings.
- Select the device to pair. Once connected, the indicator light will become solid.
- You can now play background music from your device through the preamp for practice or accompaniment.
Microphone Usage:
The built-in microphone captures the guitar's natural acoustic sound. For the microphone's effects to be audible and effective, the preamp must be connected to an external speaker or amplifier.
AUX Input:
Use the AUX input to connect external audio devices directly to the preamp. This allows you to mix external audio with your guitar sound.
6. Maintenance
Battery Care:
- The OS1 uses a 2000mAh 18650 rechargeable battery.
- Do not expose the battery to high temperatures, fire, or water.
- Do not dismantle or modify the battery.
- Avoid short-circuiting the battery.
- Always dispose of batteries responsibly according to local regulations.
Cleaning:
Wipe the unit with a soft, dry cloth. Do not use abrasive cleaners or solvents.
7. Troubleshooting
- Unit does not power on: Ensure the battery is fully charged. Check that the battery is correctly inserted into the compartment.
- No sound output: Verify all cables (pickup wire, output to amplifier) are securely connected. Check the volume level on both the preamp and your amplifier.
- Microphone not effective: Ensure the preamp is connected to an external speaker or amplifier. The microphone's effects are primarily heard through an amplified output.
- Bluetooth connection issues: Make sure the preamp is in pairing mode (flashing BT indicator). Ensure your mobile device's Bluetooth is on and within range. Try restarting both devices.
8. Specifications
| Feature | Specification |
|---|---|
| Material | ABS Plastic |
| Battery | 1 x 2000mAh Rechargeable Lithium Battery (18650 type) |
| Dimensions (L x W x H) | 90mm x 50mm x 45mm (3.54in x 1.97in x 1.77in) |
| Item Weight | 207g (7.30oz) |
| Connectivity | Bluetooth 5.0, Type-C Charging Port, AUX Input, Audio Input/Output |
| Effects | Reverb, Chorus, Delay |
| Pickup System | Dual-pickup (Piezo and Microphone) |
9. User Tips
- Professional Installation: Due to the requirement of opening holes in your guitar, consider professional installation to ensure proper fit and function, and to avoid damage to your instrument.
- Microphone Amplification: Remember that the microphone component of the dual-pickup system will only be fully effective when the preamp is connected to an external amplifier or speaker.
- Bluetooth for Practice: Utilize the Bluetooth 5.0 feature to connect your phone or tablet and play along with backing tracks, making practice sessions more engaging.
- Battery Check: If the unit doesn't power on, always check the battery first. The OS1 uses a standard 18650 rechargeable battery.
10. Warranty and Support
For any questions, technical support, or warranty inquiries, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase. Specific warranty terms and conditions may vary and are typically provided at the point of sale or on the manufacturer's official website.
