1. Introduction
The Douk Audio T14 Phono Preamplifier is designed to convert phono signals from your MM (Moving Magnet) or MC (Moving Coil) record player to a line-level signal, making it compatible with modern amplifiers or active speakers. It also features a built-in headphone amplifier and tone controls for a personalized listening experience. Its compact design and high-quality components ensure clear, low-noise audio transmission.
2. Package Contents
- 1 × T14-EQ Preamp
- 1 × USB Cable (Type-C)
Image: The Douk Audio T14 Phono Preamplifier box showing the preamp unit and USB-C cable.
3. Product Overview
3.1 Front Panel
The front panel features a 3.5mm headphone output, a power indicator, Bass and Treble tone control knobs, and a combined power switch/volume knob.
Image: Close-up of the T14 front panel showing the 3.5mm headphone jack, power indicator, and control knobs.
3.2 Rear Panel
The rear panel includes stereo RCA Line Out, a DC 5V USB-C power input, MM/MC Phono Input (RCA), and a Ground (GND) terminal.
Image: Detailed view of the T14 rear panel with labels for RCA output, DC 5V input, MM/MC phono input, and ground terminal.
3.3 MM/MC Switch
A switch on the bottom of the unit allows selection between MM (Moving Magnet) and MC (Moving Coil) phono input types to match your turntable's cartridge.
Image: The T14 Phono Preamplifier shown with a turntable and speakers, highlighting the MM/MC switch on the bottom.
3.4 Tone Control
Independent treble and bass controls allow adjustment within a ±5dB range, enabling you to fine-tune the sound to your personal preference.
Image: Close-up of the T14 front panel showing the Bass and Treble adjustment knobs.
4. Setup
- Connect Turntable: Use RCA cables to connect your turntable's phono output to the MM/MC INPUT on the rear panel of the T14. If your turntable has a ground wire, connect it to the GND terminal on the T14 to reduce hum.
- Select Cartridge Type: Locate the MM/MC switch on the bottom of the T14 and set it to match your turntable's cartridge type (MM or MC).
- Connect to Amplifier/Speakers: Use RCA cables to connect the OUTPUT on the rear panel of the T14 to an available line-level input (e.g., AUX, CD) on your amplifier or active speakers.
- Connect Power: Connect the provided USB cable to the DC 5V IN port on the rear panel of the T14 and plug the other end into a DC 5V power adapter (not included, ≥0.6A recommended).
- Power On: Turn on your amplifier/speakers first, then turn on the T14 by rotating the volume knob clockwise.
Video: Demonstration of setting up a similar Fosi Audio Box X5 Phono Preamp. Note: This video is for a similar model (Box X5) and may have slight differences in features or connections compared to the T14.
Video: Short demonstration of a similar Fosi Audio Box X5 Mini Preamplifier setup. Note: This video is for a similar model (Box X5) and may have slight differences in features or connections compared to the T14.
Video: Demonstration of a similar NEOHIPO TP10 Phono Preamp setup. Note: This video is for a similar model (TP10) and may have slight differences in features or connections compared to the T14.
5. Operating
- Volume Control: Rotate the large knob on the front panel clockwise to increase the volume and counter-clockwise to decrease it.
- Tone Adjustment: Use the Bass and Treble knobs to adjust the low and high frequencies of the audio output according to your preference.
- Headphone Output: Plug your 3.5mm headphones into the headphone jack on the front panel. The headphone output has priority; if headphones are connected, the stereo RCA output will be muted. Ensure the headphone cable is unplugged if you wish to use the stereo RCA output.
- Power Off: Rotate the volume knob counter-clockwise until it clicks to turn off the T14. It is recommended to turn off your amplifier/speakers first, then the T14, and finally your turntable.
6. Specifications
| Parameter | Value |
|---|---|
| Audio Input | MM/MC Phono |
| Audio Output | Stereo RCA / 3.5mm Headphone Jack |
| Input Level (MM) | 0.005V RMS |
| Input Level (MC) | 0.0005V RMS |
| Frequency Response | Conforms to RIAA characteristics (±0.5dB) |
| Treble / Bass Range | ±5dB |
| Headphone Output Power (32Ω) | 250mW |
| Headphone Output Power (64Ω) | 100mW |
| Headphone Output Power (128Ω) | 60mW |
| Headphone Impedance Range | 16-200Ω |
| THD | ≤0.1% |
| Output Level | 0.6V RMS |
| S/N Ratio (Phono) | ≥80dB |
| Working Voltage | DC 5V (≥0.6A) |
| Dimensions (W*D*H) | 84*84*28mm / 3.31*3.31*1.10in |
| Net Weight | 176g / 0.39lb |
7. Troubleshooting
- No Sound:
- Ensure all cables are securely connected.
- Verify the MM/MC switch setting matches your cartridge.
- Check if the power adapter is providing sufficient current (DC 5V ≥0.6A).
- If using headphones, ensure they are properly plugged in and the volume is up. If using RCA output, ensure headphones are unplugged.
- Confirm your amplifier/active speakers are powered on and set to the correct input.
- Distorted Sound:
- Check if the volume level is too high, causing clipping.
- Ensure the MM/MC switch is correctly set for your cartridge.
- Inspect your turntable's stylus for wear or damage.
- Hum or Noise:
- Ensure the turntable's ground wire is securely connected to the T14's GND terminal.
- Try moving the T14 away from other electronic devices that might cause interference.
- Check for loose cable connections.
- Verify that the power supply is stable and free from noise.
8. Maintenance
- Keep the unit in a dry, dust-free environment.
- Clean the exterior with a soft, dry cloth. Avoid using liquid cleaners or solvents.
- Do not block ventilation openings.
- Avoid exposing the unit to extreme temperatures or direct sunlight.
9. Warranty and Support
For warranty information and technical support, please refer to the documentation provided with your purchase or visit the official Douk Audio website. Keep your proof of purchase for any warranty claims.