© Pro-Ject Audio Systems · Phono Box ultra 500 · Revision 2018.10.25
4
Stand-By
The button on the front panel of the unit 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.
Technical specifications Pro-Ject Phono Box ultra
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
Input impedance:
10, 100, 1k, 47k ohms / 100pF
Input capacitance / impedance:
100pF, 200pF, 320pF and 420pF */47kohms
B
Together with other input impedance settings without any
influence!
Input gain:
40 and 43dB
B
/ 60 and 63dB
A
Signal / Noise ratio MM:
85dBV (90dBV - 'A' weighted)
Signal / Noise ratio MC:
65dBV (71dBV - 'A' weighted)
THD:
<0,0005% MM, < 0,004% MC
RIAA-equalization curve accuracy:
<0,4dB / 20Hz - 20kHz
Subsonic filter:
at 20Hz with 18dB/octave
Input:
1 pair RCA/phono sockets
Line-level output:
1 pair RCA/phono sockets
Power supply DC:
18V/500mA
Power consumption:
18V/80mA DC
Dimensions W x H x D (D with sockets): 119 x 37 x 103 (113)mm
Weight:
340g 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, 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
©
2018. 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.
