Mackie Onyx 80 15. STEREO Switch, 13. AUX Sends, 14. PRE Switch, 16. PAN, Constant Loudness

400 Hz to 8 kHz on the mono channels, and HIGH shelving at 12 kHz. “Shelving” means that the circuitry boosts

15. STEREO Switch	SEND
	AUX

ONYX 80 SERIES

or cuts all frequencies past the specified frequency. For example, rotating the LOW EQ knob 15 dB to the right boosts bass frequencies below 80 Hz and continuing on down to the lowest note you ever heard. “Peaking” means that the frequencies around the center frequency are less affected by the EQ the further away they are.

13. AUX Sends

These tap a portion of each channel’s signal out to either an effects processor or for stage monitoring. The AUX Send levels are controlled by the channel’s AUX 1-8 knobs, and by the AUX MASTER 1-8 knobs [37].

These are more than just effects and monitor sends. They can be used to create stereo in-ear monitor mixes, generate separate mixes for recording, for another zone, or “mix-minuses” for broadcast.

14. PRE Switch

This switch is used to select whether the Aux send signal is pre-fader or post-fader. When the PRE switch is up, the Aux send signal is post-fader, which is usually used when you are using the Aux send to go to an effects processor. This way, when fader changes are made, the “wet” signal going to the effects processor moves up and down along with the “dry” signal, maintaining a balance

When this switch is pushed in, the associated odd/even pair of Aux sends become a stereo send and pan control, respectively. For example, if you press the STEREO switch for Aux 1 and 2, the Aux 1 knob controls the signal level to both Aux 1 and Aux 2, and the Aux 2 knob controls the panning of the signal between Aux 1 and 2. This is useful for providing a stereo mix for IEM (in-ear monitor) systems.

16. PAN

PAN adjusts the amount of channel signal sent to the left versus the right outputs.

With the PAN knob hard left, the signal feeds the MAIN LEFT (and GROUP 1, 3, 5, and 7, depending on the setting of the GROUP ASSIGN switches). With the knob hard right, the signal feeds the MAIN RIGHT (and GROUP 2, 4, 6, and 8).

		1
OO	MAX	PRE
		2
		STEREO
OO	MAX
L	R
		3
OO	MAX	PRE
		4
		STEREO
OO	MAX
L	R
		5
OO	MAX	PRE
		6
		STEREO
OO	MAX
L	R
		7
OO	MAX	PRE
		8
		STEREO
OO	MAX
L	R

PAN

L R

between them.

When the PRE switch is pushed in, the Aux send signal is pre-fader, which is usually used for sending to monitors (stage monitor wedges or IEM, in-ear monitor systems).

This way, when changes are made to fader levels in the front-of-house mix, it doesn’t affect the monitor mix.

The pre-fader Aux Sends are post-EQ by default. How- ever, an internal jumper is provided on each channel to change the pre-fader Aux Sends to pre-EQ, if desired.

This requires some soldering skills, so contact Tech Support for information on how to access the pre/post-EQ jumpers for the Aux Sends.

Constant Loudness	MUTE GROUP
The Onyx	1	2
80 Series	3	4
PAN control
employs a
design called	MUTE
“Constant
Loudness.” If you have a channel

panned hard left (or right) and then pan to the center, the signal is attenuated 3 dB to maintain the same apparent loudness. Otherwise, it would make the sound appear much louder when panned center.

						EQ				ASSIGN
						IN/OUT	MUTE		FADER	PAN
INPUT	GAIN	POLARITY	LOW CUT		INSERT	EQ
							PRE-EQ		POST-
				PRE-EQ
									MUTE
DIRECT											AUX SEND 1
OUT						INTERNAL JUMPER				PRE/POST
				POST-EQ					"POST"		KNOB
									SIGNAL		TO AUX SEND 1
			INTERNAL
											BUS
			JUMPER
											AUX SEND 2
										PRE/POST KNOB
Aux "Pre vs. Post"							"PRE" SIGNAL				TO AUX SEND 2
											BUS
Signal Flow Diagram
								TO AUX SENDS 3-8

12 ONYX 80 SERIES