1. Introducere
The Pro-Ject Phono Box S2 Ultra is a high-performance phono preamplifier designed to enhance the audio quality from your turntable. It features a discrete circuit design without operational ampliificatori (OpAmps) and utilizes audiophile-grade polystyrene capacitors for precise RIAA equalization. Its robust metal casing provides effective protection against electromagnetic interferences, ensuring a clean and detailed sound reproduction.
This manual provides essential information for setting up, operating, and maintaining your Phono Box S2 Ultra, ensuring optimal performance and longevity.

Figura 1: Față view of the Pro-Ject Phono Box S2 Ultra. This image displays the sleek, silver-colored metal chassis with a single power button on the left and the "Phono Box S2 Ultra" text along with the Pro-Ject logo on the right.
2. Configurare și conexiuni
Before connecting your Phono Box S2 Ultra, ensure all audio equipment is powered off. Carefully unpack the unit and verify all components are present.
2.1. Despachetare și conținut
Your package should contain the Phono Box S2 Ultra unit and its external 18V DC power supply.
2.2. Connecting Your Turntable
Conectați cablurile de ieșire RCA de la platan la "In" RCA jacks on the rear of the Phono Box S2 Ultra. Ensure the left and right channels are correctly matched (typically red for right, white/black for left). If your turntable has a ground wire, connect it to the ground terminal located next to the input jacks.
2.3. Connecting to Your Ampmai vie / Receptor
Conectați "Out" RCA jacks of the Phono Box S2 Ultra to a line-level input on your amplifier or receiver (e.g., "Aux", "CD", "Line In"). Do not connect it to a "Phono" input on your amplifier, as this would result in double equalization and distorted sound.
2.4. Conexiune la alimentare
Connect the external 18V DC power supply to the "18V" input jack on the rear of the Phono Box S2 Ultra. Then, plug the power supply into a suitable AC outlet.

Figure 2: Rear connections of the Phono Box S2 Ultra. This image highlights the "In" (input) and "Out" (output) RCA connectors for left and right channels, the ground screw, the small black button for the subsonic filter, and the 18V DC power input jack.
2.5. Initial Configuration (Dip Switches)
The Phono Box S2 Ultra features dip switches on its underside for adjusting input impedance, capacitance, and gain. These settings should be matched to your phono cartridge's specifications for optimal sound. Refer to your cartridge's manual for recommended settings. A small tool (e.g., a toothpick or small screwdriver) may be needed to adjust these switches.
- Câştig: Adjusts the output level to match your amplifier's input sensitivity and cartridge output. Four adjustable gain levels are available.
- Input Impedance/Capacitance: Crucial for matching Moving Magnet (MM) and Moving Coil (MC) cartridges. Incorrect settings can lead to frequency response anomalies.
- Filtru subsonic: A switchable -18 dB @ 20Hz filter is located on the rear panel (see Figure 2). This filter helps to remove very low-frequency rumble and warp-induced signals that can cause speaker cone excursion without contributing to audible music.
It is recommended to experiment with these settings to find the best sound for your specific setup and listening preferences.
3. Funcționare
Once all connections are secure and dip switches are set, you can begin using your Phono Box S2 Ultra.
3.1. Pornire/Oprire
Press the power button on the front panel (refer to Figure 1) to turn the unit on or off. A small LED indicator next to the button will illuminate when the unit is powered on.
3.2. Listening to Records
With the Phono Box S2 Ultra powered on and your amplifier set to the correct input, you can now play records on your turntable. Adjust the volume on your amplifier as usual.

Figure 3: The Phono Box S2 Ultra integrated into an audio system. This image shows the compact preamplifier positioned next to a turntable, demonstrating its small footprint and how it fits into a typical vinyl playback setup.
4. Întreținere
Proper care will ensure the longevity and performance of your Phono Box S2 Ultra.
- curatenie: Disconnect the unit from power before cleaning. Use a soft, dry, lint-free cloth to wipe the exterior. Avoid using liquid cleaners, aerosols, or abrasive materials.
- Plasare: Așezați unitatea pe o suprafață stabilă și plană, ferită de lumina directă a soarelui, surse de căldură și umiditate excesivă. Asigurați o ventilație adecvată în jurul unității.
- Depozitare: Dacă depozitați unitatea pentru o perioadă lungă de timp, deconectați-o de la priză și depozitați-o într-un loc răcoros și uscat, de preferință în ambalajul original.
5. Depanare
If you encounter issues with your Phono Box S2 Ultra, consult the following table for common problems and solutions.
| Problemă | Cauza posibila | Soluţie |
|---|---|---|
| Niciun sunet sau sunetul se aude foarte slab. |
|
|
| Sunet distorsionat sau nenatural. |
|
|
| Zgomot de bâzâit sau bâzâit. |
|
|
6. Specificații
The following are key technical specifications for the Pro-Ject Phono Box S2 Ultra:
- Model: Cutie telefonică S2 Ultra
- Intrare/Ieșire: 1 pereche de conectori RCA
- Canale: 2
- Voltage: 18 volți (DC)
- Material: Metal casing
- Caracteristici: Switchable input impedance/capacitance, Four adjustable gain levels, Switchable Subsonic filter –18 dB @ 20Hz, Audiophile-grade polystyrene capacitors, No Operational Ampliificatori (OpAmps) used.
- Greutate: Aproximativ 1.52 lire sterline (0.69 kg)
- Conformitate: CE, FCC
- Producător: Proiect
Note: Product dimensions provided in source data (0.39 x 0.39 x 0.39 inches) appear to be incorrect. The unit features a compact, surface-mount design.
7. Garanție și asistență
For detailed warranty information, please refer to the warranty card included with your product or visit the official Pro-Ject Audio Systems webTermenii și condițiile de garanție pot varia în funcție de regiune.
Should you require technical assistance or support, please contact your authorized Pro-Ject dealer or the Pro-Ject customer service department. Contact information can typically be found on the manufacturer's website-ul sau în ambalajul produsului.
Pentru mai multe informații, vizitați Pro-Ject Store on Amazon.





