SFT Preamplifier Pickup System User Manual

1. Introduction

Thank you for choosing the SFT Preamplifier Pickup System. This innovative device is designed to significantly enhance the acoustic properties of your guitar, providing rich, resonant tones and versatile effects. This manual will guide you through the installation, operation, and maintenance of your new preamplifier system.

2. Key Features

• SFT (Same Frequency Trans) Technology: Drives the guitar body to phonate, increasing frequency response and making the sound more resonant, solid, and dynamic, even without an external amplifier.
• Integrated Effects: Features built-in Reverb, Chorus, and Delay effects for creative sound shaping.
• Dual-Pickup System: Combines a piezo pickup and a microphone to capture comprehensive details of your playing, adding extensiveness and dynamics.
• Bluetooth Connectivity: Allows connection to a mobile phone for playing along with background music or tracks.
• Rechargeable Battery: Equipped with a 2000mAh rechargeable Li-ion battery for portable use.
• Durable Construction: Made from Acrylonitrile Butadiene Styrene (ABS) material.

3. Package Contents

Please verify that all items are present in the package:

• 1 x SFT Preamplifier Pickup
• 1 x End-Pin Jack
• 1 x Vibrating Horn
• 1 x Pickup Wire
• 1 x Type-C Cable
• 2 x Clip

4. Setup and Installation

Important Note: This is an on-board preamplifier system that requires opening holes in your guitar for proper installation. Professional installation by a qualified luthier or guitar technician is highly recommended to avoid damage to your instrument.

4.1. Components Overview

Figure 4.1: Overview of the SFT Preamplifier Pickup System's controls and interfaces.

4.2. Installation Steps (Professional Installation Recommended)

1. Prepare the Guitar: Carefully mark the locations for the preamplifier unit, end-pin jack, and vibrating horn on your guitar.
2. Drill Holes: Precisely drill the necessary holes for mounting the components. Ensure correct sizing to prevent damage.
3. Install End-Pin Jack: Secure the end-pin jack at the designated location, typically at the bottom of the guitar.
4. Mount Vibrating Horn: Install the vibrating horn inside the guitar body, ensuring it has clear contact with the soundboard for optimal resonance transmission.
5. Connect Pickup Wire: Connect the pickup wire from the piezo pickup (usually under the saddle) to the preamplifier unit.
6. Install Preamplifier Unit: Mount the preamplifier unit securely, ensuring all connections are firm.
7. Insert Battery: Open the battery compartment and insert the 2000mAh rechargeable battery. Ensure correct polarity.

Figure 4.2: Battery compartment with 2000mAh battery.

5. Operating Instructions

5.1. Powering On/Off

Locate the power button or switch on the preamplifier unit. Press and hold (or toggle) to power the unit on or off. The Dial LED Lamp will illuminate when the unit is active.

5.2. Adjusting Effects

The preamplifier features dedicated controls for Reverb, Chorus, and Delay effects. Rotate the corresponding knobs to adjust the intensity of each effect. Experiment with different settings to find your desired sound.

5.3. Bluetooth (BT) Connection

The unit is equipped with Bluetooth functionality (BT5.0). To connect to your mobile phone or other Bluetooth-enabled device:

1. Ensure the preamplifier is powered on.
2. Activate Bluetooth on your mobile device.
3. Search for available devices. The preamplifier should appear as a discoverable device.
4. Select the preamplifier from the list to pair. Once paired, you can play background music through the system, which will be mixed with your guitar sound.

Figure 5.1: Bluetooth and other features.

5.4. Microphone Usage

The system includes a microphone as part of its dual-pickup setup. For the microphone to be effective and audible, the preamplifier must be connected to an external speaker or amplifier. Adjust the 'Mic' control knob to blend the microphone signal with the piezo pickup signal.

6. Maintenance

6.1. Charging the Battery

The preamplifier is equipped with a 2000mAh rechargeable battery. When the battery indicator shows low power, connect the provided Type-C cable to the charging port on the unit and to a suitable USB power source. The charging rate is increased by 50% with the Type-C interface.

Figure 6.1: Charging the preamplifier via Type-C cable.

6.2. Cleaning

Wipe the unit with a soft, dry cloth. Do not use abrasive cleaners or solvents, as these may damage the finish or internal components.

6.3. Storage

When not in use for extended periods, store the preamplifier in a cool, dry place away from direct sunlight and extreme temperatures. It is advisable to fully charge the battery before long-term storage.

7. Troubleshooting

• No Sound Output:
  • Ensure the unit is powered on and fully charged.
  • Check all cable connections (pickup wire, end-pin jack to amplifier).
  • Verify that the volume on your amplifier/speaker is turned up.
• Microphone Not Working:
  • The microphone requires connection to an external speaker or amplifier to be effective. Ensure your system is connected.
  • Adjust the 'Mic' control knob to increase the microphone signal.
• Bluetooth Connection Issues:
  • Ensure the preamplifier is in pairing mode or discoverable.
  • Turn off and on Bluetooth on your mobile device.
  • Move closer to the preamplifier to ensure you are within Bluetooth range.
• Poor Resonance/Effects:
  • Ensure the vibrating horn is properly installed and making good contact with the guitar's soundboard.
  • Adjust the Reverb, Chorus, and Delay knobs to desired levels.

8. Specifications

Figure 8.1: Product Dimensions.

9. Warranty and Support

Specific warranty information for this product is not provided in the available documentation. For details regarding warranty coverage, technical support, or service, please refer to the manufacturer's official website or contact the retailer from whom you purchased the product. Please retain your proof of purchase for any warranty claims.