1. Introducción
The Pro-Ject Phono Box RS is a high-performance phono preamplifier designed for both Moving Magnet (MM) and Moving Coil (MC) cartridges. It offers extensive adjustability for input impedance, capacitance, and gain, allowing for precise matching with a wide range of cartridges. This manual provides essential information for the proper setup, operation, and maintenance of your Phono Box RS.
2. Instrucciones de seguridad
- Always connect the power adapter to the unit last, after all other audio connections have been made.
- Asegúrese de que la fuente de alimentación voltage coincide con los requisitos especificados en la unidad.
- No exponga la unidad a la lluvia ni a la humedad.
- Avoid placing the unit near heat sources such as radiators, heat registers, stoves, or other heat-producing apparatus.
- No bloquee ninguna abertura de ventilación.
- Disconnect the unit from the power outlet during lightning storms or when unused for long periods.
- Encargue todas las tareas de mantenimiento a personal técnico cualificado. Se requiere realizar el mantenimiento cuando el aparato haya sufrido algún daño, como por ejemplo si el cable de alimentación o el enchufe están dañados, si se ha derramado líquido o han caído objetos en el interior del aparato, si el aparato ha estado expuesto a la lluvia o la humedad, si no funciona con normalidad o si se ha caído.
3. Contenido del paquete
Por favor, compruebe que su paquete contiene los siguientes artículos:
- Pro-Ject Phono Box RS unit
- Power supply unit (18V DC)
- Manual de usuario
4. Producto terminadoview
4.1 Controles del panel frontal
The front panel of the Phono Box RS features controls for adjusting various parameters to optimize performance with your phono cartridge.
Imagen: Frente view of the Pro-Ject Phono Box RS, highlighting the impedance selector and control switches.
- Botón de encendido: Enciende y apaga la unidad.
- Selector de impedancia: A rotary knob allowing adjustment of input impedance from 10 Ohm to 1,200 Ohm for MC cartridges.
- Interruptor de silencio: Silencia la salida de audio.
- Interruptores de ganancia: Adjusts the input gain (e.g., 40 dB, 50 dB, 60 dB) for both RCA and XLR outputs.
- Equalization Switches: Selects between RIAA and DECCA equalization curves.
- Subsonic Filter Switch: Activates or deactivates the 20 Hz, 12 dB/octave subsonic filter.
4.2 Conexiones del panel posterior
The rear panel provides all necessary audio input and output connections, along with the power input.
Image: Rear panel connections, including RCA and XLR inputs/outputs.
- Entradas de audio: One stereo RCA input and one stereo XLR input for connecting your turntable.
- Salidas de audio: Stereo RCA and stereo XLR outputs for connecting to your amplificador o receptor.
- Terminal de tierra: For connecting the ground wire from your turntable to minimize hum.
- Entrada de alimentación de 18 V CC: Connects to the supplied external power supply.
5. Configuración
Follow these steps to set up your Pro-Ject Phono Box RS:
- Colocación: Place the Phono Box RS on a stable, level surface away from strong electromagnetic fields and heat sources.
- Conexión del tocadiscos:
- Connect the RCA or XLR output cables from your turntable to the corresponding input on the Phono Box RS.
- Connect the ground wire from your turntable to the ground terminal on the Phono Box RS.
- AmpConexión del elevador: Connect the RCA or XLR output from the Phono Box RS to a line-level input (e.g., 'Aux', 'CD', 'Line In') on your amplifier or receiver. Do NOT connect it to another phono input.
- Conexión de energía: Connect the supplied 18V DC power supply to the '18V DC' input on the rear of the Phono Box RS, then plug the power supply into a wall outlet.
- Ajustes iniciales: Before playing music, ensure the Mute switch is engaged.
6. Instrucciones de funcionamiento
The Phono Box RS offers extensive customization to match your cartridge and listening preferences.
6.1 Cartridge Type Selection (MM/MC)
The Phono Box RS automatically detects the cartridge type based on the impedance and gain settings. For MM cartridges, typically use higher capacitance and lower gain. For MC cartridges, adjust impedance and gain as needed.
6.2 Adjusting Input Impedance (MC Cartridges)
For Moving Coil (MC) cartridges, use the front panel rotary knob to adjust the input impedance. Start with the manufacturer's recommended impedance for your cartridge. Common settings range from 10 Ohm to 1,200 Ohm. Experiment to find the best sound for your system.
6.3 Adjusting Input Capacitance (MM Cartridges)
For Moving Magnet (MM) cartridges, the input capacitance can be adjusted. The unit offers options such as 100pF, 200pF, 300pF, 420pF, 520pF/47k ohm. Refer to your MM cartridge's specifications for the recommended capacitance. The 47k ohm setting is standard for MM cartridges.
6.4 Ajuste de ganancia
Use the gain switches to match the output level of your cartridge to your amplifier's input sensitivity. Options typically include 40 dB, 50 dB, and 60 dB. Higher gain is generally used for lower output MC cartridges.
6.5 Equalization Curve
The Phono Box RS supports both RIAA and DECCA equalization curves. RIAA is the standard for most modern records. Select DECCA only if you are playing older records specifically mastered with the DECCA curve.
6.6 Filtro subsónico
Activate the subsonic filter (20 Hz, 12 dB/octave) if you experience excessive low-frequency rumble or woofer pumping, which can be caused by warped records or turntable vibrations. This filter helps to remove inaudible low-frequency noise without affecting the musical content.
7. Mantenimiento
To ensure the longevity and optimal performance of your Phono Box RS, follow these maintenance guidelines:
- Limpieza: Use a soft, dry cloth to clean the exterior of the unit. Do not use liquid cleaners or solvents, as they may damage the finish.
- Ventilación: Asegúrese de que las aberturas de ventilación no estén obstruidas para evitar el sobrecalentamiento.
- Almacenamiento: Si va a almacenar la unidad durante un período prolongado, desconéctela de la fuente de alimentación y guárdela en un lugar fresco y seco.
8. Solución de problemas
If you encounter issues with your Phono Box RS, consult the following table before contacting support.
| Problema | Posible causa | Solución |
|---|---|---|
| Sin sonido | Unit not powered on; Mute engaged; Incorrect connections; AmpEntrada de ificador no seleccionada. | Check power connection and switch; Disengage Mute; Verify all audio cables are correctly connected; Select correct input on ampmás duradero. |
| Ruido de zumbido o zumbido | Ground wire not connected; Ground loop; Nearby electrical interference; Faulty cables. | Ensure turntable ground wire is connected to Phono Box RS; Try different power outlets; Move unit away from other electronics; Replace audio cables. |
| Sonido distorsionado | Incorrect gain setting; Incorrect impedance/capacitance; Damaged cartridge/stylus. | Adjust gain to appropriate level for your cartridge; Verify impedance/capacitance settings match your cartridge; Inspect cartridge and stylus for damage. |
| Sound too quiet or too loud | Configuración de ganancia incorrecta. | Adjust the gain switches on the front panel to match your cartridge output and amplifier input sensitivity. |
9. Especificaciones
Technical specifications for the Pro-Ject Phono Box RS:
- Entradas de audio: 1 Stereo RCA, 1 Stereo XLR
- Adjustable Input Impedance: 10 ohmios a 1,200 ohmios
- Input Capacitance Options: 100pF, 200pF, 300pF, 420pF, 520pF/47k ohm
- Fixed Input Impedance: 10 Ohm (for specific configurations)
- Input Gain (with XLR): 40 dB, 50dB (B), 60dB (A)
- Filtro subsónico: 20 Hz, 12 dB / octava
- Fuente de alimentación: Dual 18 V/250 mA DC
- Consumo de energía: 150 mA DC, Less than 1W in Standby
- Dimensiones (An. x Al. x Pr.): 8.1" x 2.9" x 7.9" (206 x 72 x 200 mm)
- Peso del producto: 4.4 libras (2 kg)
Componentes internos
Imagen: interna view of the Phono Box RS circuit board.
10. Garantía y soporte
Pro-Ject products are manufactured to the highest standards and undergo strict quality control. In the unlikely event of a defect, please refer to the warranty terms provided with your purchase documentation. For technical support or service inquiries, please contact your authorized Pro-Ject dealer or distributor. Keep your proof of purchase for warranty claims.