User Manual

Apollo 8 Hardware Manual Front Panel 14

(7) Pad

When enabled, the channel’s XLR input signal level is attenuated by 20 dB. Pad does

not effect the Line or Hi-Z inputs.

Pad can be used to reduce signal levels when overload distortion is present at low

preamp gain levels, such as when particularly sensitive microphones are used on loud

instruments, and/or if the A/D converter is clipping.

(8) Polarity

When enabled, the polarity (aka “phase”) of the input channel’s signal is inverted.

Polarity affects the Mic, Line, and Hi-Z inputs.

Tip: Polarity inversion can help reduce phase cancellations when more than one

microphone is used to record a single source.

(9) Stereo Link

This switch links the preamp controls of adjacent channels together (1+2 or 3+4) to

create stereo input pairs. When channels are linked as a stereo pair, any preamp control

adjustments will affect both channels of the stereo signal identically.

Note: Only the same type of inputs can be linked (Mic/Mic or Line/Line). The Hi-Z

inputs cannot be linked.

(10) Input Indicators

These indicators (MIC/LINE/HI-Z) display which input is currently active for the channel.

To select MIC or LINE, use the INPUT switch (#4). To select Hi-Z, plug a ¼” mono TS

cable into the Hi-Z input.

LINE indicator color

The color of the LINE indicator changes to reﬂect the state of the LINE INPUT GAIN

setting, which is conﬁgured in the Hardware panel within the Console Settings window.

White – The line input is routed through the preamp so the input gain can be adjusted.

Green – The preamp circuitry is bypassed and the line input is ﬁxed at a reference level

of +4 dBu.

(11) Channel 1 – 4 Select Indicators

The currently selected preamp channel is indicated by the illuminated numbers above

level meters 1 – 4. When a preamp channel (or channels, when stereo linked) is

selected, its channel number is illuminated. The currently selected channel increments

when the Preamp knob (#2) is pressed.

Note: The numbers for channels 5 – 8 do not illuminate, as they cannot be se-

lected for front panel control adjustments.