Owner`s manual

[7] Input 1 (Left channel) and 2 (right channel).
- Wired to IN 1/2 RCA inputs. See note [1] for a functionality description.
[8] Line/Mic selector
- It limits the gain input of the Preamplifier from about 34 dB (Mic position) to about
14 dB (Line position).
[9] Stereo OUT
- Output of Left and Right channels of the Soundcard.
- The Left channel is wired to OUT left [3], The Right channel is wired to OUT right [3].
- It can drive an Headphone.
[10] Phantom power supply for Input 1/2
- A low current 3.6 V phantom power supply is provided to input 1 and 2 when the
switch is in the right position.
- The voltage is obtained from an 8.2KOhm resistor connected to a very clean source
of 3.6 V. This voltage is suitable for most microphone electret capsules such as the
Panasonic WM61 series.
[11] Pre-Amp OUT
- Output of Left and Right channels of the Preamplifier.
- It can be used for monitoring signals in Input 1/3 (left channel) and 2/4 (right
channel).
- It can be used for listening the soundcard output, when the soundcard is connected
in loopback. In this configuration the output level in Jack [11] can be adjusted by
means of the knobs [13] and [14] and the output signal level is shown on the VU-
meters [4] and [5].
- It can drive an Headphone.
[12] Phantom power supply for Input 3/4
- See note for switch [10].
[13] IN Level 1/3
- Preamplifier Level gain for channels 1 and 3
[14] IN Level 2/4
- Preamplifier Level gain for channels 2 and 4
X4 Owner's Manual - Rev. 1.4 - page 12