9762A
– Preamplifier
Owner’s Manual
Page 14
RTZ Professional Audio
7.3
Line Output Transformer Termination (JP1)
Jumper JP1 (see Figure 1) allows selecting the transformer termination
resistor to either 1.5K or 600 ohms. Note that the termination resistor
should be set to match the line out transformer secondary strapping
configuration as listed in Table 2.
Figure 1
– 48V Enable Switch and Transformer Jumpers
7.4
48V LED Configuration Options (JP3)
The 48V phantom LED may be configured to indicate the presence of
phantom power in two modes. The use of external microphone splitter
transformers (mainly in live sound) opens up the possibility that phantom
power may be “back fed” into another preamp via the splitter transformer.
If another preamplifier is connected to the splitter and is supplying
phantom 48V, then the other preamplifier could see 48V applied to its
input from the other preamp on the splitter as well.
Table 3 - 48V LED Indicator Configuration Jumper