Mackie SR244 VLZ Pro / SR324 VLZ Pro VLZ Pro Owner's Manual - Page 19

CHANNEL STRIP FEATURES The channel strip is where you dress up each channel's audio: setting the gain, adding EQ, riding the fader, tapping signal off to stage monitors and effects devices. After a signal leaves the channel strip it goes through a mix stage and on to the master section (page 22). The 24•4-VLZ PRO has 20 mono channels and two stereo channels. The 32•4-VLZ PRO has 28 mono channels and two stereo channels. All of the mono channels are identical, and all of the stereo channels are identical. In this chapter, both flavors are described with the help of an illustration from the 24•4-VLZ PRO. This shows a mono channel strip 20 and its neighbor, the stereo strip 21/22. 25. TRIM If you haven't already, please read SET THE LEVELS on page 8. TRIM adjusts the input sensitivity of the mic and line inputs connected to the channels, mono or stereo. This allows signals from the outside world to be adjusted to optimal internal operating levels. Through a mono channel's MIC (1) XLR input, there is 0dB of gain fully down and 60dB of gain fully up. Through a mono channel's LINE IN (2) TRS input, there is 15dB of attenuation fully down and 45dB of gain fully up; with a "U" (unity gain) label at about 10:00 (knob onethird up). Through the stereo channel's STEREO LINE IN (4) TRS inputs, there is 20dB of attenuation fully down and 20dB of gain fully up; with a "U" (unity gain) label at 12:00 (knob halfway up). AUX SEND: (26 and 27) 26. AUX These knobs tap a portion of each channel signal and send it out, via the AUX SENDS (10) jacks, to an amp & speakers for stage monitors or to an effects device for parallel effects processing. Each AUX knob's level ranges from off, through unity (center detent position), on up to 15dB of extra gain (fully clockwise). AUX levels are controlled by these knobs and by the AUX SEND MASTERS (46). The stereo channels' AUX knobs control a mono sum of the channel's stereo signals. For instance, channel 21 (L) and 22 (R) mix together to feed that channel's mono AUX send knobs. 27. PRE Aux sends 1 & 2 are always pre-fader, designed for stage monitor applications. Aux sends 5 & 6 are always post-fader, designed for parallel effects applications. Aux sends 3 & 4, thanks to this switch, can be set to be pre- or post-fader, so they can be used for monitors or effects. PRE-FADER: With the PRE switch engaged (down), AUX 3 and 4 deliver signals post-insert, post-low cut, post EQ, post-mute, and pre-fader. Any changes made to the channel controls, except the fader, will affect the aux send signal. POST-FADER: With the PRE switch disengaged (up), AUX 3 and 4 deliver signals post-insert, post-low cut, post-mute, post-EQ and post-fader. Any changes made to the channel controls will affect the aux send signal. OO OO OO OO OO OO OO OO OO OO OO OO Mono channels U M-I1C0GdBAVIN TRIM 20 0 60 +15dB -45dB U AUX 1 PRE +15 U 2 PRE +15 U 3 +15 U 4 +15 Stereo channels U -20 +20 U TRIM 21 22 AUX 1 PRE +15 U 2 PRE +15 U 3 +15 U 4 +15 U PRE +15 U 5 POST 6 POST +15 U PRE +15 U 5 POST 6 POST +15 U EQ HI 12k -15 +15 U MID -15 +15 600 150 1.5k FREQ 100 8k U -15 +15 LOW CUT 75 Hz 18dB/OCT LOW 80Hz U EQ -15 +15 U -15 +15 U -15 +15 U HI 12k HI MID 3k LOW MID 800Hz -15 +15 LOW 80Hz OL OL L R -20 L R -20 PAN PAN 20 MUTE 21 22 MUTE MUTE / SOLO MUTE / SOLO dB dB 10 SOLO 10 SOLO 5 5 U 1-2 U 1-2 5 5 3-4 3-4 10 10 20 L-R 20 L-R 30 30 40 40 50 50 60 60 OO OO 19