Input Gain; Input Impedance, Variable - Low-Output Mc Cartridges; Input Capacitance, Variable - High-Output Mc And Mm Cartridges - Pro-Ject Audio Systems Tube Box DS Instructions For Use

Input gain

Input impedance, variable – low-output MC cartridges
* Input capacitance is irrelevant for low-output MC cartridges
Jumper on F/ V must be inserted – see drawing below
400
300
200
100
50
20
10
Input capacitance, variable – high-output MC and MM cartridges
No jumper on F/ V – see drawing below
367pF/*
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.
60dB 50dB
500
600
700
800
900
1000
267pF/*
© Audio Trade GmbH · Pro-Ject Tube Box DS · Revision 2013.1.15
40dB
147pF/* 47pF/*47kohms
3