Front Panel; Headphone Connection; Volume; Input Selector - Pro-Ject Audio Systems Pre Box RS Digital Instructions For Use Manual

Front panel

Headphone connection

Connect the headphones to the socket on the front panel (Jack 6,3mm) and select proper impedance with
the switch (OUT Ohm) next to headphone socket. (When using headphones, main outputs XLR & RCA will
not be muted.)
To switch on from standby or to standby
The switch on the left hand side of the front panel turns the unit on or back into standby. The blue LED above
the stand-by switch shows that the unit is switched on.
!
We recommend setting the volume control to minimum, prior to switching on.

Volume

Adjust the volume to the desired level, using the large knob on the front panel.

Input selector

After the unit is powered on, operating the switch marked with ▲ ▼ selects the inputs. The selected input will
be shown by the corresponding LED.

DAC selector

Switch to DAC 1 for 24bits/192kHz and DSD capability or to DAC 2 for 32bits/384kHz support.

Filter selector

Two filters are available. Switch between FIL 1 and FIL 2 to select desired filter.

Output stage selector

The switch on the very right side select between solid state output stage and tube output stage. Selecting of
tube for the first time after start of the unit requires heat up period.

Sampling frequency LED indicators

On the front panel 8 LEDs indicate current sampling frequency of the incoming digital signal. Another 2 LEDs
for DSD indicate DSD64 or DSD128.
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© Pro-Ject Audio Systems · Pro-Ject Pre Box RS digital · Revision 2014.4.22