User manual DW FEARN PDB

[. . . ] P D B P a s s i ve D i r e c t B ox The PDB Passive Direct Box is an accessory for the D. W. Fearn VT-1 or VT-2 Microphone Preamplifier that provides high-quality "direct" recording of electric instruments. [. . . ] a guitar amp) may be connected to the 1/4" jack labeled "AMP. " This jack is wired directly in parallel with the INST jack and will split the instrument output between the PDB and the instrument amp. The PDB follows the industry standard wiring, with pin 2 "high" or "+" and pin 3 "low" or "-". Pin 1 on the connecting cable should be connected to the cable shield. Internally, pin 1 is connected to the PDB chassis through a RC network when the "GROUND LIFT" switch is in the up position. In the down position, pin 1 is connected directly to the PDB chassis. The proper position of the GROUND LIFT switch must be determined experimentally for each set-up. It may also be necessary to experiment with other "ground" switches on an instrument amp (guitar amp) if one is connected to the AMP jack. The correct position is the one that has the least amount of hum. In many situations, there will be no difference in the switch position and it can be set either way. The output level of the PDB depends on the level of the signal going into it, but with most pick-up type instruments (electric bass, electric guitar) the output will be around -50 to -30 dBu. [. . . ] The PDB is a passive device and requires no power. There is little to go wrong with the PDB, and no routine maintenance is necessary. PSB Passive Direct Box D. W. [. . . ]