INSTRUCTIONS FOR USE
Pro-Ject Phono Box DS
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.
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.
!
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.
Connectors
Right
Out
Never handle the device, the power supply while your hands are wet or damp.
Left
18V
Out
Subsonic
In
ON
OFF
In
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.
Connecting the record player
Connect the tonearm signal lead to the In 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 Out of the phono amplifier to a line input (such as AUX, CD, Tuner, Tape or Video) on your
amplifier.
Mains power connection
Connect the low voltage plug from the power supply to the Power 18V " socket of the phono amplifier before
connecting the power supply to the mains.
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© Audio Trade GmbH · Pro-Ject Phono Box DS · Revision 2013.7.15
Stand-By
The button on the left hand side of the front panel alternately turns the power on or returns it to standby mode.
The blue LED above the stand-by push button shows that the unit is switched on.
Settings
The three push buttons on the left hand side are used to set input impedance, input capacitance and input gain.
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.
10
100
Ohm
pF
100
220
dB
50 60
40
Phono Box DS
Ohm - all LEDs off = 47kohms.
pF - all LEDs off = 47pF.
LEDs pF 100, 220 and 320 - readout always + 47pF
After disconnecting the unit from the mains, all settings will be deleted.
Examples of typical settings
Ortofon 2M Red (MM)
Input impedance 47kohms
Input capacitance 147pF
Input gain 40dB
Ortofon X5-MC (High-Output MC)
Input impedance 47kohms
1000
320
Input impedance / ohms
Input capacitance / pF
Input gain / dB
10
1000
100
Ohm
pF
100
320
220
dB
50 60
40
all LEDs off = 47pF
readout + 47pF
10
1000
100
Ohm
all LEDs off = 47pF
Input capacitance 367pF
Input gain 40dB
Ortofon Rondo Red (Low-Output MC)
Input impedance 10ohms
Input capacitance (pF) *
Input gain 60dB
Subsonic filter
Subsonic
ON
OFF
A switch at the back of the phono amplifier activates and deactivates the subsonic filter.
pF
100
320
220
dB
50 60
40
readout + 47pF
10
1000
100
Ohm
pF
100
320
220
dB
50 60
40
© Audio Trade GmbH · Pro-Ject Phono Box DS · Revision 2013.7.15
* Any setting.
Input capacitance is irrelevant for
low-output MC cartridges
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Technical specifications Pro-Ject Phono Box DS
A
Typical for low output MC cartridges, B typical for MM or high output MC cartridges
* Input capacitance is irrelevant for low-output MC cartridges
A
Input impedance: 10ohms, 100ohms, 1kohm
Input capacitance/ impedance: 47pF, 147pF, 267pF and 367pF */47kohms
Input gain: 40
B
/ 50 and 60dB A
B
Noise floor: 80dB (A weighted) at 40dB input gain
THD: <0,02%
RIAA-equalisation curve accuracy: 20Hz - 20kHz / max. 0,3dB
Subsonic filter: at 20Hz with 12dB/octave
Input: 1 pair RCA/phono sockets
Line-level output: 1 pair RCA/phono sockets
Outboard power supply: 18V/500mA DC, suitable for your country's mains supply
Power consumption: 100mA DC, <1W in standby
Dimensions W x H x D (D with sockets): 103 x 72 x 144 (156)mm
Weight: 1.100g 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.
Copyright
PRO-JECT is a Registered Trademark of H. Lichtenegger.
This guide was produced by: Audio Trade GmbH
Copyright
©
2013. 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.
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© Audio Trade GmbH · Pro-Ject Phono Box DS · Revision 2013.7.15
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