Mackie PPM1008 Owner's Manual - Page 20

PPM1008 Master Controls 2 X 800W PROFESSIONAL POWERED MIXER 37 35 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 40 balance of nature. Although it may not seem cool to turn down controls, with EQ it is often your best option. Turn down the offending 36 38 39 frequency range, rather than boost the wanted range. Having many sliders will allow you to reduce the level of some frequency bands where feedback occurs. 42 45 With this constant-Q graphic EQ, the bandwidth (and Q) of a frequency band doesn't vary with the amount of 41 43 44 boost or cut. The adjustment of one slider has minimal effect on adjacent bands for all settings of the slider levels. (There's always some effect on adjacent bands to avoid 49 50 / 52 46 too much variation or ripple between bands, but the constant-Q design keeps this fairly 53 constant for all settings.) The position of the 47 sliders gives a good indication of the frequency 51 35. POWER LED response across the audio band. Non-constant types of EQ (on other mixers) give a wider 54 48 bandwidth for lower levels of boost or cut, and narrows as the level goes up or down. For example, if you're boosting 500 Hz and 2 kHz slightly, This LED comes on when the powered mixer is the 1 kHz band will also be boosted, even though the plugged into the correct-voltage AC mains supply, 1 kHz slider is in the flat position. and the rear panelFpOOoTwFSXWeITrCHswitch [2] is on. If the LED does not turn on, make sure the AC power 37. FX TO MAIN is live, both ends of the power cord are correctly This knob lets you adjust the level of the internal inserted, your electricity bill has been paid, and the effects being added to the main mix. (It is a stereo lights in town are still on. control, as the output from the internal effects processor is stereo and is added to the left and right 36. MAIN MASTER GRAPHIC EQ main mix.) This 9-band graphic equalizer adjusts the main mix output. It affects the line-level outputs [19], as well as the main speaker-level outputs if the internal amplifiers are playing the main mix. Each slider allows you to adjust 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: 63, 125, 250, 500, 1k, 2k, 4k, 8k and 16 kHz. The EQ section comes after the main level [38], and just before the main meters [40]. Therefore, as you adjust the EQ, you can keep an eye on the meters in case you over-do it and take the levels into overload. Adjust the FX level being added, compared to the other channels playing in the main mix. At the fully-down position, no effects are added, the center U mark is unity gain, and 10 dB of effects gain is available at the fully clockwise position. 38. MAIN LEVEL This knob controls the overall level of t­he main mix, and affects the main meters [40], main line-level outputs [19], main sub out [18], and the main speaker-level outputs if the internal amplifiers are playing the main mix. The level adjustment occurs before the EQ [36]. 20 PPM1008 This gives you ultimate control over your audience. Adjust it carefully, with your good eye on the meters to prevent overloading, and your good ear to the levels to make sure your audience is happy.