Introduction
This manual provides essential information for the proper setup, operation, and maintenance of your Pro-Ject Audio Phono Box DC. This compact phono preamplifier is designed to enhance the audio signal from your turntable, making it compatible with line-level inputs on your amplifier or receiver. It supports both Moving Magnet (MM) and Moving Coil (MC) cartridges, offering versatility for various turntable setups.
Figure 1: Front view of the Pro-Ject Audio Phono Box DC in black.
Safety Information
- Always disconnect the power adapter before cleaning or if the unit will not be used for an extended period.
- Do not expose the unit to rain or moisture. Avoid placing objects filled with liquid, such as vases, on the unit.
- Ensure proper ventilation. Do not block ventilation openings.
- Place the unit on a stable, level surface to prevent accidental falls.
- Avoid placing the unit near heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
- Use only the power supply provided by the manufacturer.
- Do not attempt to service the unit yourself. Refer all servicing to qualified service personnel.
Package Contents
Please check that your package contains the following items:
- Pro-Ject Audio Phono Box DC unit
- DC power adapter (18V)
- Instruction Manual
If any items are missing or damaged, please contact your retailer immediately.
Setup
Follow these steps to correctly set up your Phono Box DC:
- Placement: Position the Phono Box DC near your turntable and amplifier. Its compact size allows for flexible placement.
- Cartridge Type Selection: Locate the MM/MC switch on the rear panel of the Phono Box DC. Set it according to your turntable's cartridge type (Moving Magnet or Moving Coil). Ensure this is set correctly for optimal sound quality.
- Connect Turntable to Input: Connect the RCA output cables from your turntable to the "In" (Left and Right) RCA inputs on the rear of the Phono Box DC.
- Connect Ground Wire: Connect the ground wire from your turntable to the ground terminal on the Phono Box DC. This is crucial for minimizing hum and noise.
- Connect Output to Amplifier: Connect the "Out" (Left and Right) RCA outputs from the Phono Box DC to a line-level input on your amplifier or receiver (e.g., "Aux", "CD", "Line In"). Do NOT connect it to an amplifier's dedicated "Phono" input, as this would result in over-amplification and distortion.
- Connect Power: Connect the supplied 18V DC power adapter to the "Power 18V===" input on the rear of the Phono Box DC, then plug the adapter into a suitable power outlet.
Figure 2: Rear view showing input, output, MM/MC switch, ground terminal, and power input.
Operating
Once all connections are made and the power is supplied, the Phono Box DC is ready for operation. There are no additional controls on the unit beyond the MM/MC switch. Simply select the correct cartridge type, and the unit will automatically process the audio signal from your turntable.
- Ensure your amplifier is set to the correct input channel where the Phono Box DC is connected.
- Adjust the volume using your amplifier's controls.
Maintenance
The Pro-Ject Audio Phono Box DC requires minimal maintenance:
- Cleaning: Use a soft, dry cloth to clean the exterior of the unit. Do not use liquid cleaners or solvents.
- Dust: Keep the unit free from dust accumulation, which can affect performance and lifespan.
- Connections: Periodically check all cable connections to ensure they are secure and free from corrosion.
Troubleshooting
If you encounter issues with your Phono Box DC, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound or very low volume | Incorrect connections, MM/MC switch setting, power issue, amplifier input. |
|
| Distorted or unclear sound | Incorrect MM/MC switch setting, faulty cables, damaged cartridge. |
|
| Humming or buzzing noise | Improper grounding, interference, faulty cables. |
|
Specifications
| Feature | Detail |
|---|---|
| Brand | Pro-Ject |
| Model Number | 13072 |
| Product Dimensions (L x W x H) | 2.95 x 4.21 x 2.83 inches |
| Item Weight | 1.19 pounds |
| Material | Metal |
| Voltage | 120V |
| Maximum Supply Voltage | 9.5 Volts |
| Minimum Supply Voltage | 9.5 Volts (AC) |
| Number of Channels | 1 |
| Specification Met | RIAA Response Accuracy 0.5dB (20-20,000 Hz), THD 0.01% (MM), THD 0.05% (MC) |
Warranty Information
Pro-Ject Audio Systems products are covered by a manufacturer's warranty. The specific terms and duration of the warranty may vary by region and retailer. Please retain your proof of purchase for warranty claims.
For detailed warranty information, it is recommended to visit the official Pro-Ject Audio Systems website or contact your authorized dealer.
Support
Should you require further assistance or have questions not covered in this manual, please contact:
- Your authorized Pro-Ject Audio Systems retailer.
- Pro-Ject Audio Systems customer support via their official website: www.project-audio.com
When contacting support, please have your product model number (13072) and purchase details ready.
