BOX DESIGN Pro-Ject Amp Box S3 Audio System Instruction Manual
- June 4, 2024
- BOX DESIGN
Table of Contents
- Dear music lover,
- Safety instructions
- Connectors
- Connection to the preamplifier
- Connection to the speakers
- Mains power connection
- Remote power on
- To switch on from standby or to standby
- Technical specifications Pro-Ject Amp Box S3
- Service
- Warranty
- Copyright, trademarks
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
BOX DESIGN Pro-Ject Amp Box S3 Audio System
Dear music lover,
thank you for purchasing a Pro-Ject Audio Systems amplifier. In order to achieve maximum performance and reliability you should study these instructions for use carefully.
Warning of a hazard for the user, the unit or possible misuse.
Important notice.
Safety instructions
AC outlet voltages vary from country to country. Before connecting to the
mains, make sure that the voltage in your area meets the voltage requirements
printed on the power supply. The power cord is used to disconnect the unit
from the mains. Make sure that the power cord is easily accessible at all
times.
Never handle the device, the power cord/power supply while your hands are wet
or damp. Avoid letting liquids enter the device or the power supply. Never
place any item containing liquid, such as a flower vase on or near the device.
Never spill any liquid on the device or the power supply. Never place any
naked flame sources, such as lighted candles on or near the device. The
product shall not be used in damp or wet locations, next to a bathtub, sink,
swimming pool or any other similar conditions.
Connectors
Make all connections whilst the amplifier is disconnected from the mains. Take
care to connect the left and right channels correctly. The right channel is
usually marked red, the left channel black or white.
Make sure the polarity of the connection is correct at each end of the cables.
Only connect one loudspeaker with an impedance not less than 4 ohms per
channel. Never use any other power supply than the one supplied with the unit.
Connection to the preamplifier
The Input sockets marked Left / Right are for connecting the cables from your pre-amp or AV processor. Signal can be relayed further via Jack socket 3.5mm marked Out.
Connection to the speakers
The output terminals accept loudspeaker cables terminated with 4mm Banana plugs, spades connectors or naked wire.
Mains power connection
Connect the low voltage plug from the power supply to the Power DC 20V
socket of the amplifier before connecting the power supply to the mains.
2 © Pro-Ject Audio Systems · Amp Box S3 · Revision 2022.01.03
Remote power on
The amplifier can be switched on & off via the 12V DC 2,5mm socket marked Trigger In. Cables are available as accessories. The remote power-on signal can be relayed to further units via the Trigger Out socket.
Pay attention to the correct polarity of the cable.
Only connect the remote power cable when the pre- and power amplifier are
disconnected from the mains. Failure to observe can result in damage to the
circuit.
To switch on from standby or to standby
The push button on the front panel of the unit alternately turns the power on or returns it to standby mode. The blue LED above the stand-by push button shows that the unit is switched on.
Technical specifications Pro-Ject Amp Box S3
| Power output: | 2 x 23W/40W at 8 ohms/4 ohms (1% THD) |
|---|---|
| Peak power: | 2 x 50W at 4 ohms |
| Frequency response (20Hz – 20kHz): | <-0,7dB at 4 ohms |
| Channel separation: | >-68dB at 20kHz |
| Signal to noise ratio: | 87dBV (100dBV – ‘A’ weighted) at 4ohms |
| THD+N: | |
| Gain: | 31 dB |
| Line input sensitivity: | 360mV |
| Pre in: | 1 pair RCA |
| Bypass Output: | Jack socket 3,5mm stereo |
| Input impedance: | 25 kohms |
| Speaker connectors: | 4mm ∅ banana plugs, spades connectors or naked wire |
| Trigger: | 12V DC switching voltage, 2-pole co-axial ∅ 2,5mm co-axial jack |
| Outboard power supply: | 20V/3A DC, suitable for your country’s mains supply |
| Dimensions W x H x D (D with sockets) | 103 x 36 x 118 (136) mm |
| Weight: | 385 g without power supply |
Service
Should you encounter a problem which you are not able to alleviate or identify, please contact your dealer for further advice. Only when the problem cannot be resolved there should the unit be sent to the responsible distributor in your country.
Warranty
The manufacturer accepts no responsibility for damage caused by not adhering to these instructions for use. Modification or change to any part of the product by unauthorized persons release the manufacturer from any liability over and above the lawful rights of the customer.
Copyright, trademarks
Pro-Ject Audio Systems is a Registered Trademark of H. Lichtenegger.
This guide was produced by Pro-Ject Audio Systems Copyright © 2022. All rights
reserved.
The information was correct at the time of going to press. The manufacturer reserves the right to make changes to the technical specification without prior notice as deemed necessary to uphold the ongoing process of technical development.