Pro-Ject Audio Systems Box Design Tube Box DS2 Instructions For Use Manual page 4

Gain dB
Gain for the outputs can be set between
40dB, 45dB, 50dB, 60d8
and
65dB
in steps of 5dB or 1 OdB. Any
change will be automatically stored for the chosen input, when input is changed or the unit is switched into
standby mode.
Input impedance, variable -low-output MC cartridges
The button
Loading C
must be set to
Variable.
Use the rotary controller to set input impedance to desired
value (1 00-1 0000)
*
Input capacitance is irrelevant for low-output MC cartridges
Input impedance, 47k- high-output MC and MM cartridges
The button
Loading C
must be set to 47k.
Input capacitance, variable- high-output MC and MM cartridges
The rotary control must be set to 10 0. Press Loading 0 until the LED marked by 4 7k lights up. The device
has a basic capacity of 47pF, and the Load pf button can be used to increase the terminating capacity by
1 OOpF, 220pF or 320pF depending on the LED display, making the values 47pF, 147pF, 267pF or 367pf
available
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 (/ow-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.
Examples of typical settings
Ortofon 2M Red
Rotary control
lOG
(MM) Loading
n
47k0hm
Gain
40dB
Loading pf
lOOpF
(plus basic capacitance 47pF adds up to total of 147pf)
Ortofon MC3 Turbo
Rotary control
lOG
(High-Output MC) Loading
n
47k0hm
Gain
45d8
Loading pf
320pF
(plus basic capacitance 47pF adds up to total of 367pF)
Ortofon MC
Rotary control
200
Cadenza
Blade
Loading
n
variable
(Low-Output MC)
Gain
60d8
4
Loading pf capacitance for Low-Output MCs is not relevant
The values given by the manufacturer for capacitance settings for MM, Ml and high-output MC-
pickups are guideline values. Since the right setting is a/so dependent on the capacitance of the
tonearm cable used and the inner wiring of the tonearm, experimentation with settings can be
carried out. The recommended terminating resistance for Low-Output MC cartridges is also a
guideline. The gain should be set to the highest value, which makes distortion-free playback still
possible. You cannot destroy anything when experimenting with the different settings. Kflal
you
Iiles
bssl
i6
tight/
©Pro-Ject Audio Systems· Pro-Ject Tube Box DS2 ·Revision 2017.2.9