Pro-Ject Audio Systems Phono Box RS User manual

INSTRUCTIONS FOR USE
Pro-Ject Phono Box RS

© Audio Trade GmbH · Pro-Ject Phono Box RS · Revision 2012.9.1
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Dear music lover,
thank you for purchasing a PRO-JECT AUDIO 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.
Front panel controls
1200
1100
1000
700
400
200
150
130
100
60
30
20
10
Ohm
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.
Mute
ON/MUTE activates and deactivates mute
Selecting the de-emphasis curve
RIAA /DECCA selects the desired mode
Settings
Use the dip switches, the switch RCA /XLR at the back of the unit and the rotary control at the front to set
input gain, input capacitance and input impedance. Please set both channels equally.
!
To alter settings MUTE must be engaged. Input impedance setting (variable) can be done while
listening.
Examples of typical settings
Ortofon 2M Red (MM) - input gain 40dB, input capacitance 200pF, input impedance 47kohms
Ortofon X1-MC (high-output MC) - input gain 50dB, input capacitance 420pF, input impedance 47kohms
Ortofon Rondo Red (low-output MC) - input gain 60dB, input capacitance *, input impedance 10ohms

© Audio Trade GmbH · Pro-Ject Phono Box RS · Revision 2012.9.1
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Input / output connectors, input gain
RCA /XLR select the connectors to be used. Input gain for RCA can be set to 60, 50 or 40dB. The possible
settings for XLR are 66, 56 and 46dB.
RCA
XLR
60 66
50
40
56
46
Input impedance, variable – low-output MC cartridges
* Input capacitance is irrelevant for low-output MC cartridges
The switch F/Vmust be set to V
1200
1100
1000
700
400
200
150
130
100
60
30
20
10
Ohm
Input capacitance, variable – high-output MC and MM cartridges
The switch F/Vmust be set to F
ON
200pF 300pF 420pF 520pF
100pF
100pF
220pF
10R
47k
Fixed
234 2
1
ON
234 2
1
ON
234 2
1
ON
234 2
1
ON
234 2
1
ON
100pF
234 2
1
Input impedance, fixed – low-output MC cartridges
* Input capacitance is irrelevant for low-output MC cartridges
The switch F/Vmust be set to F
10 Ohm
100pF
100pF
220pF
10R
47k
Fixed
ON
234 2
1
ON
234 2
1
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.

© Audio Trade GmbH · Pro-Ject Phono Box RS · Revision 2012.9.1
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Connectors
Subsonic
Filter
ON
OFF
Pro-Ject Audio Systems, Vienna, Austria
Right Left
InputOutput Output
Input
100pF
100pF
220pF
10R
47k
Fixed
100pF
100pF
220pF
10R
47k
Fixed
RCA
XLR
Power
2x18V=
PUSH PUSH
!
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.
Selecting input / output connectors
RCA/XLR select the connectors to be used
Subsonic Filter
Subsonic Filter ON/OFF activates and deactivates the filter
Connecting the record player
Connect the tonearm signal lead to the Input 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 Output of the phono amplifier to a line input (such as AUX, CD, Tuner, Tape or Video) on your
amplifier.
Mains power connection
The phono amplifier is supplied with a power supply suitable for your country's mains supply. Check the label
before connecting to ensure compliance with the mains rating in your house. Connect the low voltage plug
from the power supply to the Power 2x18V "socket of the phono amplifier before connecting the power
supply to the mains.

© Audio Trade GmbH · Pro-Ject Phono Box RS · Revision 2012.9.1
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Technical specifications Pro-Ject Phono Box RS
ATypical for low output MC cartridges, Btypical for MM or high output MC cartridges
* Input capacitance is irrelevant for low-output MC cartridges
Input impedance, variable: stepless 10ohms - 1.200ohms A *
Input capacitance/impedance:, variable: 100pF, 200pF, 300pF, 420pF and 520pF/47kohms B
Input impedance, fixed: 10ohms A *
Input gain (+ 6dB using XLR sockets): 40dB and 50dB B
60dB A
Noise floor: 80dB (91dB – IEC -A)
THD: 0,019%
De-emphasis curves accuracy: 20Hz - 20kHz / max. 0,3dB
Subsonic filter: at 20Hz with 12dB/octave
Input: 1 pair RCA/phono sockets, 1 pair XLR sockets
Line-level output: 1 pair RCA/phono sockets, 1 pair XLR sockets
Outboard power supply: 2 x 18V/250mA DC, suitable for your country's mains supply
Power consumption: 150mA DC, <1W in standby
Dimensions W x H x D (D with sockets): 206 x 72 x 200 (210)mm
Weight: 2.000g without power supply
Potential incorrect use and fault conditions
No signal on one or both channels:
No connection between player and phono amplifier or amplifier. This could be due to a faulty plug,
broken wire or solder joint or simply loose plug/socket connection.
Strong hum:
No earth connection from cartridge or arm, or arm cable to phono amplifier, or earth loop.
Output too quiet or too loud, or distorted:
Input gain incorrectly set - input overloading or insufficiently amplified.
Service
Should you encounter a problem which you are not able to alleviate or identify despite the above information,
please contact your dealer for further advice. Only when the problem cannot be resolved there should the
unit be sent to the responsible distributor in your country.
Warranty
The manufacturer accepts no responsibility for damage caused by not adhering to these instructions
for use. Modification or change to any part of the product by unauthorized persons release the
manufacturer from any liability over and above the lawful rights of the customer.
PRO-JECT is a Registered Trademark of H. Lichtenegger.
This guide was produced by: Audio Trade GmbH
Copyright ©2012. All rights reserved.
The information was correct at the time of going to
press. The manufacturer reserves the right to make
changes to the technical specification without prior
notice as deemed necessary to uphold the ongoing
process of technical development.