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“Mute” and “Operate” condition. When muted, a red glow will be observed in the LED. On
occasion the preamplifier may seem not to have responded to a turn of the “Mute” knob; this
is due to “contact bounce” in the switch. Simply turn the knob again until the desired
condition is attained.
REMOTE CONTROL
The remote control allows for wireless adjustment of “Mute” and “Volume”.
The remote wand is powered by two “AAA” batteries. These should be of the alkaline type.
You will need to install them in the wand before using the remote. Since batteries can leak,
they should be removed from the wand if it is not going to be used for an extended period
of time.
Volume Up/Down: These buttons cause a motor to turn the volume control. Motorized
controls offer superior sound, as well as direct visual indication of volume setting. The front
panel control may also be used directly in the conventional way.
Mute: Pressing either side of the “Mute” button will toggle between the “Mute” and
“Operate” condition. When muted, a red glow will be observed in the LED indicator. Mute
is automatically engaged when switching on units equipped with the remote control option.
NOTE ON ABSOLUTE PHASE
Through the main RCA outputs Sigma Preamplifier inverts absolute phase. There is some
debate about the audibility of absolute phase, and it generally is not controlled for by the
recording industry (i.e., about half of your recordings may have inverted absolute phase).
If you wish to correct your playback system for absolute phase, this is easily accomplished
in the connections to your loudspeakers. Assuming that your source component(s), power
amplifier, and loudspeakers do not invert phase, you can correct for the inversion of the
Sigma Preamplifier by connecting the positive output terminals of your amplifier(s) to the
negative terminals of your loudspeakers, and the negative terminals of your amplifier(s) to
the positive terminals of your loudspeakers. Sonically, this is absolutely transparent.
Through the XLR main outputs, pin 2 is positive polarity (“pin 2 hot”) and pin 3 is negative
polarity. Note: Do not connect either pin to ground, as some XLR-to-RCA adapters might
do.
