Mackie Onyx 2480 Owner's Manual - Page 12
². AUX Sends, PRE Switch, STEREO Switch, Constant Loudness
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ONYX 80 SERIES -15 +15 EQ OUT IN OO OO OO OO OO OO OO OO OO 400 Hz to 8 kHz on the mono channels, and HIGH shelving at 12 kHz. "Shelving" means that the circuitry boosts 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 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. However, 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. 15. STEREO Switch AUX SEND 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. 1 MAX PRE 2 MAX L R STEREO 3 MAX PRE 4 MAX L R STEREO 16. PAN 5 MAX PRE PAN adjusts the amount of chan- 6 nel signal sent to the left versus the right outputs. MAX L R STEREO With the PAN knob hard left, 7 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 MAX PRE 8 MAX L R STEREO PAN GROUP 2, 4, 6, and 8). LR Constant Loudness MUTE GROUP The Onyx 1 2 80 Series PAN control 3 4 employs a design called "Constant MUTE 1 Loudness." If you have a channel panned hard left (or right) and then pan to the center, dB the signal is attenuated 3 dB to maintain t10he same ap- parent loudness. Otherwise, it would make the sound appear much louder when panned center. 5 OL +10 U 0 INPUT GAIN POLARITY LOW CUT INSERT EQ EQ IN/OUT MUTE FADER PAN ASSIGN -20 5 10 GROUP ASSIGN DIRECT OUT PRE-EQ POST-EQ INTERNAL JUMPER Aux "Pre vs. Post" Signal Flow Diagram PRE-EQ INTERNAL JUMPER POSTMUTE "POST" SIGNAL "PRE" SIGNAL TO AUX SENDS 3-8 20 1-2 PRE/POST PRE/POST AUX SEND 1 KNOB 30 AUX SEND 2 KNOB 40 50 60 3-4 TO AUX SEND 1 BUS 5-6 TO AUX SEND 2 BUS 7-8 MAIN MIX 12 ONYX 80 SERIES PFL