1. Einleitung
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. Sicherheitshinweise
- Always connect the power adapter to the unit last, after all other audio connections have been made.
- Stellen Sie sicher, dass die Stromversorgungslautstärketage entspricht den auf dem Gerät angegebenen Anforderungen.
- Setzen Sie das Gerät weder Regen noch Feuchtigkeit aus.
- Avoid placing the unit near heat sources such as radiators, heat registers, stoves, or other heat-producing apparatus.
- Blockieren Sie keine Belüftungsöffnungen.
- Disconnect the unit from the power outlet during lightning storms or when unused for long periods.
- Überlassen Sie alle Wartungsarbeiten qualifiziertem Servicepersonal. Eine Wartung ist erforderlich, wenn das Gerät auf irgendeine Weise beschädigt wurde, z. B. wenn das Netzkabel oder der Stecker beschädigt sind, Flüssigkeit in das Gerät verschüttet wurde oder Gegenstände hineingefallen sind, das Gerät Regen oder Feuchtigkeit ausgesetzt war, nicht normal funktioniert oder fallengelassen wurde.
3. Packungsinhalt
Bitte überprüfen Sie, ob Ihr Paket folgende Artikel enthält:
- Pro-Ject Phono Box RS unit
- Power supply unit (18V DC)
- Bedienungsanleitung
4. Produktüberschreitungview
4.1 Bedienelemente auf der Vorderseite
The front panel of the Phono Box RS features controls for adjusting various parameters to optimize performance with your phono cartridge.
Bild: Vorderseite view of the Pro-Ject Phono Box RS, highlighting the impedance selector and control switches.
- Netzschalter: Schaltet das Gerät ein und aus.
- Impedanzwähler: A rotary knob allowing adjustment of input impedance from 10 Ohm to 1,200 Ohm for MC cartridges.
- Stummschalter: Schaltet die Audioausgabe stumm.
- Verstärkungsschalter: 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-Filterschalter: Activates or deactivates the 20 Hz, 12 dB/octave subsonic filter.
4.2 Anschlüsse auf der Rückseite
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.
- Audioeingänge: One stereo RCA input and one stereo XLR input for connecting your turntable.
- Audioausgänge: Stereo RCA and stereo XLR outputs for connecting to your ampVerstärker oder Receiver.
- Erdungsklemme: For connecting the ground wire from your turntable to minimize hum.
- 18-V-Gleichstromeingang: Connects to the supplied external power supply.
5. Einrichtung
Follow these steps to set up your Pro-Ject Phono Box RS:
- Platzierung: Place the Phono Box RS on a stable, level surface away from strong electromagnetic fields and heat sources.
- Plattenspieleranschluss:
- 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.
- Amplifier-Verbindung: 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.
- Stromanschluss: 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.
- Anfangseinstellungen: Before playing music, ensure the Mute switch is engaged.
6. Bedienungsanleitung
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 Verstärkungseinstellung
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 Subsonic-Filter
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. Wartung
To ensure the longevity and optimal performance of your Phono Box RS, follow these maintenance guidelines:
- Reinigung: Reinigen Sie die Außenseite des Geräts mit einem weichen, trockenen Tuch. Verwenden Sie keine flüssigen Reiniger oder Lösungsmittel, da diese die Oberfläche beschädigen können.
- Belüftung: Um eine Überhitzung zu vermeiden, ist darauf zu achten, dass die Lüftungsöffnungen nicht verstopft sind.
- Lagerung: Wenn Sie das Gerät über einen längeren Zeitraum lagern, trennen Sie es vom Stromnetz und bewahren Sie es an einem kühlen, trockenen Ort auf.
8. Fehlerbehebung
If you encounter issues with your Phono Box RS, consult the following table before contacting support.
| Problem | Mögliche Ursache | Lösung |
|---|---|---|
| Kein Ton | Unit not powered on; Mute engaged; Incorrect connections; AmpVerstärkereingang nicht ausgewählt. | Check power connection and switch; Disengage Mute; Verify all audio cables are correctly connected; Select correct input on ampschwerer. |
| Summendes oder brummendes Geräusch | 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. |
| Verzerrter Ton | 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 | Falsche Verstärkungseinstellung. | Adjust the gain switches on the front panel to match your cartridge output and amplifier input sensitivity. |
9. Spezifikationen
Technical specifications for the Pro-Ject Phono Box RS:
- Audioeingänge: 1 Stereo RCA, 1 Stereo XLR
- Einstellbare Eingangsimpedanz: 10 Ohm bis 1,200 Ohm
- 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)
- Unterschallfilter: 20 Hz, 12 dB/Oktave
- Stromversorgung: Dual 18 V/250 mA DC
- Stromverbrauch: 150 mA DC, Less than 1W in Standby
- Abmessungen (BHT): 8.1" x 2.9" x 7.9" (206 x 72 x 200 mm)
- Produktgewicht: 4.4 kg
Interne Komponenten
Bild: Intern view of the Phono Box RS circuit board.
10. Garantie und Support
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.
