Question about Equalizers & Crossovers
How to set equalizer for a Mackee PPM808M 1200
Each channel strip has its own 3 band EQ with knobs that effect the hi, mid, and low.
The mid is centered at 2.5kHz and gives you 12dB of boost or cut in either direction, the high gives you 15dB of boost or cut from 12kHz and up, while the low gives you 15dB of boost or cut at 80kHz and below. At their mid positions these knobs are flat (no cut or boost).
The PPM808M also has two 9 band graphic EQs in the Master Output Section on the front panel, Monitor EQ and Main EQ. These two EQs are the last thing in the chain before the signal leaves the mixer on either of these line outs (monitor line out, or mixer line out).
The 'Monitor EQ' effects output to the monitor speakers on stage (and power amplifier if the 'Power Amp Routing' switch is pushed in).
The 'Main EQ' effects the signal to the main speakers (or the mixer line out).
Each of these 'Master Output' EQs has a Rumble Reduction button which when pressed in engages a low-cut filter which rolls off frequencies below 75Hz and is designed to prevent 'stage rumble' from things like footsteps on the stage being picked up by stage mics. These filters are separate from the graphic EQs and the Main Rumble Reduction switch effects only mono channels 1-6 (not stereo channels 7&8). It also has no effect on the EFX to MAIN or the TAPE IN. The Monitor Rumble Reduction switch however does effect the EFX to MON signal.
Posted on Jan 04, 2008
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