Alesis M-EQ230 - Manuals - manualsarea.com

Page 2 - lesis; I N T R O D U C T I O N; The; F E A T U R E S; transients; Applications

2 A lesis M-EQ 230 DUAL 1/3 OCTAVE PRECISION EQUALIZATION SYSTEM I N T R O D U C T I O N The A lesis MEQ-230 is a two channel, 30 band/channel, 1/3rd octave graphic equalizer which features a relay based power-updelay switching circuit to eliminate turn-on transients in soundsystems. Each channel fe...

Page 3 - SECTION 1; DESCRIPTION OF CONTROLS; FRONT PANEL; LED indicates the onset of distortion; indicates that a signal is; button turns the unit on or off.; BACK PANEL; M-EQ 230 for both left and right channels.

3 SECTION 1 DESCRIPTION OF CONTROLS FRONT PANEL 1/3 OCTAVE BAND FADEREach 1/3rd octave band is controlled by a center detented faderwhich provides a boost or cut of 12dB. There are 30 bands perchannel. MASTER CHANNEL GAIN FADEREach channel has a Master Gain Fader which controls thesystem's input gai...

Page 4 - S E C T I O N; I N S T R U M E N T S , M I C R O P H O N E S; A l e s i s M-EQ 230 has high impedance inputs that are; FIGURE 1; M-EQ 230 STEREO OPERATION

4 POWER JACKAccepts the +9VAC power from the M-EQ 230 Power Supply. This external supply keeps hum, noise, and ground loops to aminimum. S E C T I O N 2 S E T - U P I N S T R U M E N T S , M I C R O P H O N E S The A l e s i s M-EQ 230 has high impedance inputs that are ideally suited for use either...

Page 5 - M-EQ 230 need not be used in a stereo mode since each; channel is completely independent. In; FIGURE 2; INDEPENDENT USE OF LEFT AND RIGHT CHANNELS

5 INDEPENDENT USE OF LEFT AND RIGHT CHANNELS The M-EQ 230 need not be used in a stereo mode since each channel is completely independent. In Figure 2, the right channel is connected to the house sound system for room tuningwhile the left channel is connected to the on-stage monitor systemfor feedbac...

Page 6 - FIGURE 3; INTERFACING TO A MIXING CONSOLE VIA CHANNEL INSERTS

6 INTERFACING VIA INSERT SENDS AND RETURNSAnother way of interfacing the M-EQ 230 is to connect the unit directly to the insert send and return patch points (if your consolehas them) of the channel that is to be effected. See Figure 3 FIGURE 3 INTERFACING TO A MIXING CONSOLE VIA CHANNEL INSERTS Ales...

Page 7 - TO CONTROL FEEDBACK; be used. Set mics to approximate levels.

7 SECTION 3 O P E R A T I O N P O W E R - U P When the power is first turned on, the automatic power-up delaycircuit will mute the M-EQ 230 for 2 seconds. This is to prevent any possible turn-on transient signal from mixers, power amps, oroutboard equipment from possibly damaging speakers. TO CONTRO...

Page 8 - B ) For feedback control, the sliders of the; always be operated in the downward or cut position.; FIGURE 4; ROOM FEEDBACK FREQUENCIES; FOR INSTRUMENT TONAL CONTOURING; ) Find the desired frequency band by either referring to; t h e F r e q u e n c y C h a r t; ) Gradually raise the slider of the disired band and the

8 B ) For feedback control, the sliders of the M-EQ 230 should always be operated in the downward or cut position. FIGURE 4 CONTROLLING FEEDBACKA. Find the 2 major feedback frequencies (1 high, 1 low frequency)B. Slightly decrease adjacent bands. ROOM FEEDBACK FREQUENCIES ADJACENT BANDS SLIGHTLY DEC...

Page 9 - LED should light, turn down the; cutting the level; FIGURE 5

9 the same as simply raising the volume level. In this case, do thefollowing: 1 ) With the instrument playing, start by boosting 3 sliders at a time until the offending frequency area is found. (Ifthe Clip LED should light, turn down the Input control) 2 ) Now, decrease the sliders until you are cut...

Page 10 - FIGURE 6; AUDIO OCTAVE RANGES; As with any signal processor, the; M-EQ 230 should be used with

1 0 Voice Fullness at 120Hz; Boominess at 200 to 240Hz; Presence at 5KHz; Sibilance at 7.5KHz; Air at 12 to 15KHz Harmonica Fat at 240Hz, bite at 3-5kHz Conga Resonant ring at 200 to 240Hz; Presence and slap at 5KHz Whether used to alter the timbre of an instrument, controlfeedback, or improve speec...