1. Introduktion
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. Sikkerhedsinstruktioner
- Always connect the power adapter to the unit last, after all other audio connections have been made.
- Sørg for, at strømforsyningen voltage opfylder de krav, der er angivet på enheden.
- Udsæt ikke enheden for regn eller fugt.
- Avoid placing the unit near heat sources such as radiators, heat registers, stoves, or other heat-producing apparatus.
- Bloker ikke nogen ventilationsåbninger.
- Disconnect the unit from the power outlet during lightning storms or when unused for long periods.
- Overlad al service til kvalificeret servicepersonale. Service er påkrævet, når apparatet er blevet beskadiget på nogen måde, såsom strømforsyningsledning eller stik er beskadiget, væske er blevet spildt, eller genstande er faldet ind i apparatet, apparatet har været udsat for regn eller fugt, ikke fungerer normalt , eller er blevet droppet.
3. Pakkens indhold
Kontroller venligst, at din pakke indeholder følgende varer:
- Pro-Ject Phono Box RS unit
- Power supply unit (18V DC)
- Brugermanual
4. Produktet er slutview
4.1 Betjeningselementer på frontpanelet
The front panel of the Phono Box RS features controls for adjusting various parameters to optimize performance with your phono cartridge.
Billede: Forside view of the Pro-Ject Phono Box RS, highlighting the impedance selector and control switches.
- Power knap: Tænder og slukker for enheden.
- Impedansvælger: A rotary knob allowing adjustment of input impedance from 10 Ohm to 1,200 Ohm for MC cartridges.
- Mute Switch: Dæmper lydoutputtet.
- Gain Switches: 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 Bagpaneltilslutninger
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.
- Lydindgange: One stereo RCA input and one stereo XLR input for connecting your turntable.
- Lydudgange: Stereo RCA and stereo XLR outputs for connecting to your amplifier eller modtager.
- Jordterminal: For connecting the ground wire from your turntable to minimize hum.
- 18V DC strømindgang: Connects to the supplied external power supply.
5. Opsætning
Follow these steps to set up your Pro-Ject Phono Box RS:
- Placering: Place the Phono Box RS on a stable, level surface away from strong electromagnetic fields and heat sources.
- Pladespillerforbindelse:
- 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 tilslutning: 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.
- Strømtilslutning: 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.
- Indledende indstillinger: Before playing music, ensure the Mute switch is engaged.
6. Betjeningsvejledning
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 Forstærkningsindstilling
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 Subsonisk 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. Vedligeholdelse
To ensure the longevity and optimal performance of your Phono Box RS, follow these maintenance guidelines:
- Rensning: 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.
- Ventilation: Sørg for, at ventilationsåbningerne ikke er blokerede for at forhindre overophedning.
- Opbevaring: Hvis enheden skal opbevares i længere tid, skal den afbrydes fra strømforsyningen og opbevares et køligt og tørt sted.
8. Fejlfinding
If you encounter issues with your Phono Box RS, consult the following table before contacting support.
| Problem | Mulig årsag | Løsning |
|---|---|---|
| Ingen lyd | Unit not powered on; Mute engaged; Incorrect connections; AmpLifier-indgang ikke valgt. | Check power connection and switch; Disengage Mute; Verify all audio cables are correctly connected; Select correct input on amplivligere. |
| Brummende eller summende lyd | 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. |
| Forvrænget lyd | 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 | Forkert forstærkningsindstilling. | Adjust the gain switches on the front panel to match your cartridge output and ampLifierens indgangsfølsomhed. |
9. Specifikationer
Technical specifications for the Pro-Ject Phono Box RS:
- Lydindgange: 1 Stereo RCA, 1 Stereo XLR
- Adjustable Input Impedance: 10 Ohm til 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)
- Subsonisk filter: 20 Hz, 12 dB / oktav
- Strømforsyning: Dual 18 V/250 mA DC
- Strømforbrug: 150 mA DC, Less than 1W in Standby
- Dimensioner (WHD): 206 x 72 x 200 mm (8.1" x 2.9" x 7.9")
- Produktvægt: 4.4 lb (2 kg)
Interne komponenter
Billede: Intern view of the Phono Box RS circuit board.
10. Garanti og 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.
