Pro-Ject Audio Systems Tube Box S User Manual

Page 5

Technical specifications Pro-Ject Tube Box S

Typical for low output MC cartridges,

typical for MM or high output MC cartridges

* Input capacitance is irrelevant for low-output MC cartridges
Tubes:

2 x ECC83 (12AX 7A)

Input impedance:

10ohms, 100ohms, 1kohm, 2kohms

Input capacitance/impedance:

50pF, 150pF, 270pF and 370pF */47kohms

Together with other input impedance settings without any influence!

Input gain:

41dB

/ 51dB and 61dB

Noise floor:

94dB (A weighted) at 41dB input gain

75dB (A weighted) at 51dB and 61dB input gain

THD:

<0,01% at 41dB input gain

<0,05% at 51dB and 61dB input gain

RIAA-equalisation curve accuracy:

20Hz - 20kHz / max. 0,4dB

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/1.000mA DC, suitable for your country's mains supply

Power consumption:

470mA DC, <1W in standby

Dimensions W x H x D (D with sockets): 103 x 74 x 125 (137)mm
Weight:

810g 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

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.