INSTRUCTIONS FOR USE Pro-Ject Tube 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.
Input gain 50dB 40dB 40 dB 50 dB 50 dB 40 dB F/V 100 pF 220 pF 50 dB 40 dB 60dB Input impedance, variable – low-output MC cartridges * Input capacitance is irrelevant for low-output MC cartridges Jumper on F/ V must be inserted – see drawing below 400 300 500 600 200 100 700 800 50 20 900 1000 F/V F/V 100 pF 220 pF 40 dB 50 dB 10 Input capacitance, variable – high-output MC and MM cartridges No jumper on F/ V – see drawing below 47pF/*47kohms 100 pF 220 pF F/V F/V 147pF/* F/V
Connectors Left 18V No jumper = 60dB 40 dB 50 dB 220 pF 100 pF F/V Out Subsonic ON OFF In ! Out 40 dB 50 dB 220 pF 100 pF F/V Right In 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 or RIAA) on the amplifier. Never use any other power supply than the one supplied with the unit.
Technical specifications Pro-Ject Tube 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 Tubes: 2 x ECC83 (12AX 7A) Input impedance, variable: stepless 10ohms - 1.000ohms A Input capacitance / impedance: 47pF, 147pF, 267pF and 367pF */47kohms B Input gain: 40dB and 50dB B / 60dB A Noise floor: 93dB (A weighted) THD: <0.1% De-emphasis curves accuracy: 20Hz - 20kHz / max.
