Phono Box S3 B - Hi-Fi System PRO-JECT - Free user manual and instructions
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| Product Type | Phono Preamplifier |
| Compatible Cartridge Types | Moving Coil (MC) and Moving Magnet (MM) |
| Gain | MM: 40 dB, MC: 60 dB (adjustable via DIP switches) |
| Input Impedance | MM: 47 kΩ, MC: 100 Ω (adjustable) |
| Output | RCA line-level |
| Power Supply | External power adapter, 18V DC / 500 mA |
| Dimensions (W x H x D) | 206 x 72 x 152 mm |
| Weight | 0.9 kg |
| Color | Black (B) |
| Subsonic Filter | Built-in, switchable |
| RIAA Equalization | Accurate to 0.5 dB |
| Signal-to-Noise Ratio | > 80 dB (MM), > 70 dB (MC) |
| Total Harmonic Distortion | < 0.005% |
| Channel Separation | > 75 dB at 1 kHz |
| Input Sensitivity | MM: 5 mV, MC: 0.5 mV |
| Output Level | 1.5 V (at 1 kHz) |
| Construction | Metal chassis, aluminum front panel |
| Accessories | Power supply, user manual |
| Warranty | 2 years (depending on region) |
| Repairability | Serviceable by authorized technicians; spare parts available |
Frequently Asked Questions - Phono Box S3 B PRO-JECT
How do I connect the Phono Box S3 B to my amplifier?
Connect the RCA cables from the turntable to the INPUT jacks on the Phono Box. Then connect another RCA cable from the OUTPUT jacks to a line-level input (not phono input) on your amplifier.
Can I use both MM and MC cartridges?
Yes, the Phono Box S3 B supports both Moving Magnet (MM) and Moving Coil (MC) cartridges. Use the DIP switches on the bottom to select the appropriate gain and impedance.
How do I set the gain and impedance?
Refer to the DIP switch settings in the manual. For MM, set gain to 40 dB and impedance to 47 kΩ. For MC, set gain to 60 dB and impedance to 100 Ω. Adjust according to your cartridge specifications.
What is the subsonic filter for?
The subsonic filter removes low-frequency rumble below 20 Hz that can cause turntable feedback and speaker damage. It can be switched on/off via a button on the front panel.
Does the Phono Box S3 B require a ground connection?
Yes, if your turntable has a ground wire, connect it to the ground terminal on the Phono Box to reduce hum.
What power supply does it use?
The Phono Box S3 B uses an external power adapter (18V DC, 500 mA). Connect it to the DC input on the rear panel.
Can I leave the unit on all the time?
It is recommended to turn off the unit when not in use to save energy and prolong component life. There is no power switch; unplug or use a switched power strip.
How do I clean the Phono Box?
Use a soft, dry cloth to clean the exterior. Do not use any solvents or abrasive cleaners. Keep the unit away from moisture.
Why is there no sound coming from my speakers?
Check that all RCA connections are secure, the power supply is plugged in, and the input selector on your amplifier is set to the correct line input. Also ensure the turntable is connected correctly.
What is the warranty period?
The warranty is typically 2 years from the date of purchase. Check your local dealer for specific terms. Keep your receipt as proof of purchase.
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USER MANUAL Phono Box S3 B PRO-JECT
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Product information
Brand : PRO-JECT
Model : Phono Box S3 B
Category : Hi-Fi System