© Pro-Ject Audio Systems · Phono Box ultra 500 · Revision 2018.10.25
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 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.
Input impedance / input capacitance
–
high-output MC and MM cartridges
Input impedance
–
low-output MC cartridges
* Input capacitance is irrelevant for low-output MC cartridges
