Pro-Ject Audio Systems Pro-Ject Tube Box S Manuale utente

INSTRUCTIONS FOR USE

Pro-Ject Tube Box S

Dear music lover,

thank you for purchasing a PRO-JECT AUDIO phono 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 supply is used to disconnect the unit from the mains. Make sure that the power supply is easily

accessible at all times. Never handle the device, the 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.

Settings

Use the dip switches at the bottom of the unit to set input gain, input capacitance and input impedance.

Please set both channels equally.

To find out which type your cartridge is please consult the literature accompanying your cartridge.

The literature for cartridges should also specify the correct input impedance (low-output MC cartridges) and

the correct input capacitance (high-output MC and MM cartridges), into which the cartridge is designed to

work. If in doubt please consult your dealer.

To alter settings the unit must be disconnected from the power supply and the amplifier.

Examples of typical settings

Ortofon 2M Red (MM)

input gain 41dB, input capacitance 150pF, input impedance 47kohms

12345678

41dB

2000R

100pF

200pF

1000R

100R

10R

51dB

Ortofon X5-MC (High-Output MC)

input gain 41dB, input capacitance 370pF, input impedance 47kohms

12345678

41dB

2000R

100pF

200pF

1000R

100R

10R

51dB

Ortofon Rondo Red (Low-Output MC)

input gain 61dB, input capacitance *, input impedance 10ohms.

* Input capacitance is irrelevant for low-output MC cartridges

12345678

41dB

2000R

100pF

200pF

1000R

100R

10R

51dB

Input impedance / input capacitance – high-output MC and MM cartridges

50pF 150pF

270pF 370pF

47k

234

12345678

100pF

200pF

Input impedance – low-output MC cartridges

* Input capacitance is irrelevant for low-output MC cartridges

100

ON ON

234

1 2 341 2 341 2 34

12345678

2000R

1000R

100R

10R

Input gain

61dB

51dB 41dB

12345678

41dB

51dB

Connectors

Pro-Ject Audio Systems, Vienna, Austria

18V

Make all connections whilst the phono amplifier is disconnected from the power supply.

Take care to connect the left and right channels correctly. The right channel is usually marked red, the

left channel black or white.

Do not connect the phono amplifiers output to a phono input (sometimes labelled gram, disc or RIAA)

on the amplifier.

Never use any other power supply than the one supplied with the unit.

Connecting the record player

Connect the tonearm signal lead to the In of the phono amplifier. The earthing wire may be connected to the

screw terminal if you encounter hum problems when using the record player.

Connection to the amplifier

Connect the Out of the phono amplifier to a line input (such as AUX, CD, Tuner, Tape or Video) on your

amplifier.

Mains power connection

Connect the low voltage plug from the power supply to the Power 18V "socket of the phono amplifier before

connecting the power supply to the mains.

Stand-By

The 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 Tube Box S

ATypical for low output MC cartridges, Btypical for MM or high output MC cartridges

* Input capacitance is irrelevant for low-output MC cartridges

Tubes: 2 x ECC83 (12AX 7A)

Input impedance: 10ohms, 100ohms, 1kohm, 2kohms A

Input capacitance/impedance: 50pF, 150pF, 270pF and 370pF */47kohms B

Together with other input impedance settings without any influence!

Input gain: 41dB B / 51dB and 61dB A

Noise floor: 94dB (A weighted) at 41dB input gain

75dB (A weighted) at 51dB and 61dB input gain

THD: <0,01% at 41dB input gain

<0,05% at 51dB and 61dB input gain

RIAA-equalisation curve accuracy: 20Hz - 20kHz / max. 0,4dB

Subsonic filter: at 20Hz with 12dB/octave

Input: 1 pair RCA/phono sockets

Line-level output: 1 pair RCA/phono sockets

Outboard power supply: 18V/1.000mA DC, suitable for your country's mains supply

Power consumption: 470mA DC, <1W in standby

Dimensions W x H x D (D with sockets): 103 x 74 x 125 (137)mm

Weight: 810g without power supply

Potential incorrect use and fault conditions

No signal on one or both channels:

No connection between player and phono amplifier or amplifier. This could be due to a faulty plug,

broken wire or solder joint or simply loose plug/socket connection.

Strong hum:

No earth connection from cartridge or arm, or arm cable to phono amplifier, or earth loop.

Output too quiet or too loud, or distorted:

Input gain incorrectly set - input overloading or insufficiently amplified.

Service

Should you encounter a problem which you are not able to alleviate or identify despite the above information,

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.

PRO-JECT is a Registered Trademark of H. Lichtenegger.

This guide was produced by: Audio Trade GmbH

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.

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