Mackie ProFX12 Owner's Manual - Page 22

R R BAL / UNBAL R LINE IN 12 ST RETURN FX SEND MAIN OUT PHONES ProFX8 and ProFX12 U -20 +20 GAIN U 3615 10 5 0 5 EQ 10 STEREO GRAPHIC EQ 31 15 48V 10 PHANTOM 5 POWER 0 5 32 POWER 10 HI 15 15 MAIN 12kHz -15 +15 125 250 500 1K 2K 4K 8K METERS 0dB=0dBu U -15 +15 U 37 MID 2.5kHz MAIN MIX MON OL EQ IN BYPASS 38 15 10 6 3 -15 +15 LOW 80Hz FX PRESETS 01 BRIGHT ROOM 02 WARM LOUNGE 03 SMALL STAGE 48 USB 33 0 2 4 U 7 U AUX MON +15 U 04 WARM THEATER 05 WARM HALL 06 CONCERT HALL 07 PLATE REVERB 08 CATHEDRAL 09 CHORUS 10 CHORUS + REV 11 DOUBLER 49 PRESETS OO 39 +10 INPUT LEVEL 10 20 30 L R FX +15 12 TAPE SLAP 13 DELAY 1 (300ms) 14 DELAY 2 (380ms) 52 15 DELAY 3 (480ms) 16 REVERB + DLY (250ms) MUTE 40 34 50 USB THRU BREAK (MUTES ALL CHANNELS) PAN U U U 51 53 OL 41 35 OO LR OO +15 +15 OO MAX +20 OO FX MASTER FX TO MON PHONES TAPE LEVEL OO OO 42 MUTE 43 MUTE OL OL MON 11/12 ST RTN FX RTN dB dB dB dB 10 10 10 10 MAIN dB 10 5 5 5 5 5 35. TAPE LEVEL This knob controls the input level of signals entering the tape inputs. It is conveniently located close to the break switch [34] so all channels may be quickly muted while bringing up the background music while the band is taking a break. 36. STEREO GRAPHIC EQ This 7-band graphic equalizer adjusts the main mix output. It affects the line-level outputs [3, 14], but not the tape outputs [18], headphones [16], or the USB output [4]. This EQ may be used for the monitor mix instead of the main mix, if the main mix/mon switch [37] is engaged. It may also be quickly bypassed using the EQ in/bypass switch [38]. Each slider adjusts the level of its frequency band, with up to 15 dB of boost or cut, and no change in level at the center (0 dB) position. The frequency bands are: 125, 250, 500, 1k, 2k, 4k, and 8kHz. The EQ section comes before the main fader [47] and meters [33]. As with the channel EQ, just take it easy. There is a large amount of adjustment, and if you are not careful, you can upset the delicate balance of nature. Although it may not seem cool to actually turn down controls, with EQ it is often your best option. Turn down the offending frequency range, rather than boost the wanted range. Use it to reduce the level of some frequency bands where feedback occurs. U U U 5 5 5 10 44 10 4510 20 20 20 30 30 30 40 40 40 50 50 50 60 60 60 U 5 4610 20 30 40 50 60 U 5 4710 20 30 40 50 60 37. MAIN MIX/MON Use this switch to choose if the stereo graphic EQ [36] is used for the stereo left and right main mix or if it is used for the monitors. For example, there may be times when the graphic EQ may be used wisely in the monitor mix to reduce feedback in the monitors from nearby microphones. OO OO OO OO OO 34. BREAK SWITCH This important "take-a-break" switch quickly mutes all the microphones and line-level inputs when the band is between sets. This will prevent protestors or rogue karaoke singers from storming the stage at the interval. The monitor send [12] and FX send [13] are not affected. Check this switch first if you are having trouble with no sound in the system. You can still play the stereo RCA tape inputs [17] in the main stereo mix, and play audio coming in from your computer via the USB inputs. For example, you could play a soothing CD while the band is off stage. 38. EQ IN/BYPASS Use this switch to quickly engage or disengage the stereo graphic EQ. This may be used for quick checks of EQ settings or to shorten the signal path if not using the EQ. 39. USB INPUT LEVEL This control adjusts the signal level of the two channels coming in from the computer, via the USB port, relative to the mix of the other channels. Adjust it carefully to achieve the desired mix with the other channels. The USB input from audio software such as Tracktion, could be individual instrument tracks, a mix of tracks, or processed tracks. 22 ProFX8 and ProFX12