Pro-Ject Audio Systems Tube Box DS2 Bedienungsanleitung

INSTRUCTIONS FOR USE

Pro-Ject Tube Box DS2

Dear music lover,

Thank you for purchasing a tube phono preamplifier from Pro-Ject Audio Systems.

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 connect/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 devic

e 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

Make all connections whilst the phono amplifier is disconnected from the power supply.

Do not connect the phono amplifiers output to a phono input (sometimes labelled

gram

disc

RIAA

)

on the amplifier.

Never use any other power supply than the one supplied with the unit.

Connecting one or two record players

Connect left and right channels of the tonearm signal lead to the sockets marked

IN1

IN2

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 sockets marked

OUT1

OUT2

of the phono amplifier to one or two line inputs (such as

AUX

Tuner

Tape

Video

) on your amplifier.

Mains power connection

Connect the low voltage plug from the power supply to the

Power 18V DC

socket of the phono amplifier

before connecting the power supply to the mains.

Trigger connection

A unit is equipped with

Trigger Output

and

Trigger Input

sockets (jack 2.5mm, 12V) to turn on/off a Pro-Ject

product with trigger sockets. A 45cm long trigger cable (polarity ) is supplied for this purpose. Longer

cables are available as accessories. The remote power-on signal can be relayed to further units via the

Trigger Output

socket.

Controls

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. Tube Box DS2 can be used immediately.

Settings

Use the buttons and the rotary control at the front to control the unit. Any change of settings will be

automatically stored for the chosen input, when input is changed or the unit is switched into standby mode.

Input and Output

Tube Box DS2 has two separate inputs and outputs. The button

Input

selects between inputs and the button

Output

switches between outputs.

Subsonic

Turn on and off subsonic filter. Any change will be automatically stored for the chosen input, when input is

changed or the unit is switched into standby mode.

Gain dB

Gain for the outputs can be set from 40dB to 65dB in steps of 5dB or 10dB. Any change will be

automatically stored for the chosen input, when input is changed or the unit is switched into standby mode.

Input impedance, variable – low-output MC cartridges

* Input capacitance is irrelevant for low-output MC cartridges

The button

Loading ohm

must be set to

Variable.

Use the rotary controller to set input impedance to desired

value (10Ω-1000Ω)

Input impedance, 47k - high-output MC and MM cartridges

The button

Loading ohm

must be set to 47k.

Input capacitance, variable – high-output MC and MM cartridges

The button Loading pF sets the capacitance to 100pF, 220pF or 320pF

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.

Examples of typical settings

Ortofon 2M Red

(MM) input gain 40dB,

input capacitance 100pF,

input impedance 47kohms

Ortofon X5-MC

(High-Output MC) input gain 50dB,

input capacitance 320pF,

input impedance 47kohms

Ortofon Rondo Red

(Low-Output MC) input gain 60dB,

input capacitance is irrelevant,

input impedance 10ohms.

Technical specifications Pro-Ject Tube Box DS2

Tubes: 2 x ECC83 (12AX 7A)

Input impedance : variable 10-1000 ohms/ 47.000 ohms (47kΩ)

Input capacitance : 100pF, 220pF, 320pF

Gain: 40, 45, 50, 60 and 65 dB (switchable)

Output voltage typically: 500 mV/1kHz at 5mV/1kHz (at 40dB)

Noise floor: 88 dB (A weighted, at 40dB gain)

THD: <0,04 %

RIAA-equalisation curve accuracy: 20 Hz – 20 kHz / +0,2dB / -0,2dB

Input: 2 pairs RCA/phono sockets

Line-level output: 2 pairs RCA/phono sockets

Outboard power supply: 18 V/1000 mA DC

Power consumption: 490mA DC, <0,5W in standby

Dimension W x D x H (D with sockets) 206mm x 227 (239)mm x 91mm aluminium

240mm x 227 (239)mm x 93mm wood

Trigger output/input: 12V (2,5mm jack)

Weight (without power supply): 1650g aluminium

1930g wood

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, 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.

Pro-Ject Audio Systems is a registered Trademark of

H. Lichtenegger.

This guide was produced by: Pro-Ject Audio Systems

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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