BOX DESIGN S2 Pro-Ject Tube Box Instruction Manual

INSTRUCTIONS FOR USE
Pro-Ject Tube Box S2

S2 Pro-Ject Tube Box

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)

Examples of typical settings
Ortofon 2M Red (MM)
input capacitance 147pF, input impedance 47kohms
3-ON
rest- OFF
Ortofon X5-MC (High-Output MC)
input capacitance 367pF, input impedance 47kohms
1,3-ON
rest- OFF
Ortofon Rondo Red (Low-Output MC)
input impedance 10ohms, Input capacitance is irrelevant for low-output MC cartridges
8-ON
rest- OFF

Connectors

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 DC socket of the phono amplifier before connecting the power supply to the mains.

Front panel controls

Stand-By
The button on the left side of a front panel of the unit turns the unit on or returns it to standby mode. The blue
LED above the stand-by push button shows that the unit is switched on.
Gain setting
Buttons marked with ◄and ► set gain of the amplifier. Selected value is indicated by LED. Possible settinare 40, 43, 50, 53, 60 and 63dB.
Subsonic
The button on the right side of a front panel turns on and off subsonic filter. The blue LED above the button is illuminated when it´s on.
Technical specifications Pro-Ject Tube Box S2
A Typical for low output MC cartridges,B  typical for MM or high output MC cartridges

• Input capacitance is irrelevant for low-output MC cartridges

587pF*/47kohmsB
Together with other input impedance settings without any influence!
Input gain:| 40dB,43dB B ; 50dB, 53dB and 60dB, 63dB A
Noise floor:| 80dB (A weighted) at 40dB input gain
75dB (A weighted) at 50 dB and 63dB input gain
THD:| <0,02% at 40dB input gain
<0,05% at 50dB and 63dB input gain
RIM-equalisation curve accuracy:| 20Hz – 20kHz / max. 0,4dB
Subsonic filter:| at 20Hz with 18dB/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 73 x 119 (131)mm
Weight:| 410g without power supply

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