Pro-Ject Audio Systems MC Step Up Box DS3 B User manual

INSTRUCTIONS FOR USE
Pro-Ject MC Step Up Box DS3 B

© Pro-Ject Audio Systems · Pro-Ject MC Step Up Box DS3 B · Revision 2023.09.13
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Dear music lover,
thank you for purchasing a Pro-Ject Audio Systems step up transformer.
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
Never handle the device while your hands are wet or damp.
Avoid letting liquids enter the device. 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
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 step-up transformers output to a MC phono input or to a line input on your
amplifier.
Connecting the record player
Connect your record player’s phono RCA or XLR outputs to the Left and Right Inputs of the step-up transformer.
If you connected the lead to the RCA input, please also connect the grounding wire to the screw terminal of
the Phono Box.
Connection to the MM input on amplifier or MM phono stage
Connect the RCA or XLR Left and Right Outputs of the step-up transformer to a MM phono input on your
amplifier or dedicated phono stage.
The MC Step Up Box DS3 B is a passive device, it does not require power.
Right
Recommended
Cartridge
Impedance
Left
Outputs
Inputs
Gain 24dB: 40-150
Gain 30dB: 20-100
Gain 24dB: 10-40
Gain 30dB: 5-20
Inputs
Outputs
Audio Tuning Vertriebs GesmbH, Pro-Ject Audio Systems,
Margaretenstrasse 98, A-1050 Wien

© Pro-Ject Audio Systems · Pro-Ject MC Step Up Box DS3 B · Revision 2023.09.13
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Input / Output setting
Select between XLR (=button out ) and RCA (button in ) connections with the Input and Output buttons on
the front panel.
Cartridge settings
Push buttons on the backpanel for Recommended Cartridge Impedance and frontpanel for Gain are used to fine
tune the settings for your MC cartridge.
For the Gain setting, experiment with both settings to find out which works best with your amplifier or MM
phono preamp and the rest of your source devices.
To find out the Recommended Cartridge Impedance for your cartridge consult the literature accompanying your
cartridge. If in doubt, please consult your dealer.
Remember as with many things analogue: trust your ears. Experiment with different settings and find
out what you like most!
Examples:
Ortofon Quintet Red/Blue/Bronze/Black
Impedance >20 ohms -> Gain 24 or 30dB; Recommended Cartridge Impedance button out
Ortofon Cadenza Red/Blue/Bronze
Impedance 50-150 ohms -> Gain 24 or 30dB; Recommended Cartridge Impedance button out
Ortofon Cadenza Bronze/Black
Impedance >10 ohms -> Gain 24 or 30dB; Recommended Cartridge Impedance button out or in
Technical specifications Pro-Ject MC Step Up Box DS3 B
Frequency response 10Hz-55kHz: +-1 dB
Recommended load for output: 47 kOhm //100pF
Input MC: 1x pair RCA phono unbalanced sockets
1 x pair XLR sockets
Output : 1x pair RCA phono unbalanced sockets
1 x pair XLR sockets
Dimensions W x H x D (D with sockets): 206 x 79 x 197 (209) mm
Weight: 1740g
Input
XLR / RCA
Gain
24 dB / 30 dB
Output
XLR / RCA
MC Step Up Box DS3 B

© Pro-Ject Audio Systems · Pro-Ject MC Step Up Box DS3 B · Revision 2023.09.13
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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.
Wrong input/output selection.
Strong hum:
No earth connection from cartridge or arm, or arm cable to phono amplifier, or earth loop.
Wrong input/output selection.
Service
Should you encounter a problem which you are not able to alleviate or identify, please contact your dealer for
further advice. Only if the problem cannot be resolved there, the unit should 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 changes 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, trademarks
Pro-Ject Audio Systems is a registered Trademark of
H. Lichtenegger.
This guide was produced by: Pro-Ject Audio Systems
Copyright ©2023. 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.
Waste from Electrical and Electronic Equipment (WEEE): This directive mandates the collection and recycling
of electronics and component materials in order to reduce the amount going to landfills. Outside North
America, when the user decides to discard this product, it must be sent to a separate collection facility for
recycling. Please contact your point of purchase for more details.
EU-Conformity Declaration
We, Canor spol. s r.o.
Družstevná 39
08006 Prešov
Slovakia
(manufacturer)
declare under our whole responsibility that the products:
MC Step Up Box DS3 B
which are regularly supplied to
Pro-Ject Audio Systems a division of Audio Tuning GmbH
Margaretenstrasse 98
1050 Vienna,

© Pro-Ject Audio Systems · Pro-Ject MC Step Up Box DS3 B · Revision 2023.09.13
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Austria
to which this declaration relates is in conformity with the following harmonized standards for:
LVD: STN EN 62368-1:2018
EMCD: EN 55032:2015
EMCD: EN 55035:2017
following the provisions of EC directives as follows:
LVD: 2014/35/EU
EMCD: 2014/30/EU
and the EC regulation 1275/2008 and its framework directive 2009/125/EC for energy related products
(ErP) according to the test performed under the following technical standard
EN 50564:2011
Pro-Ject Audio Systems a division of Audio Tuning GmbH
1050 Vienna, Austria, Margaretenstrasse 98
[email protected]