Pro-Ject Tube Box S2 Instructions for Use

INSTRUCTIONS FOR USE

Pro-Ject Tube Box S2

© Pro-Ject Audio Systems · Pro-Ject Tube Box S2 · Revision 2017.12.5

2

Dear music lover,

thank you for purchasing a Pro-Ject Audio Systems 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 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.

Setting for MM and high output MC cartridges

47pF is basic is the lowest fixed setting. DIP switches 1, 2 and 3 add more capacitance
input capacitance 147pF (1-OFF, 2-OFF, 3-ON)
input capacitance 267pF (1-OFF, 2-ON, 3-OFF)
input capacitance 367pF (1-ON, 2-OFF, 3-ON)
input capacitance 487pF (1-ON, 2-ON, 3-OFF)
input capacitance 587pF (1-ON, 2-ON, 3-ON)

DIP switches 4-8 are OFF, it represent value 47kohms.

Setting for MC cartridges

Input capacitance is irrelevant for low-output MC cartridges
input impedance 10ohms (4-OFF, 5-OFF, 6-OFF, 7-OFF, 8-ON)

input impedance 100ohms (4-OFF, 5-OFF, 6-OFF, 7-ON, 8-OFF)
input impedance 470ohms (4-OFF, 5-OFF, 6-ON, 7-OFF, 8-OFF)
input impedance 1kohms (4-OFF, 5-ON, 6-OFF, 7-OFF, 8-OFF)
input impedance 2kohms (4-ON, 5-OFF, 6-OFF, 7-OFF, 8-OFF)
(Combinations are also possible)