Instruction/ maintenance manual of the product M-EQ230 Alesis
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A lesis M-EQ 230 DUAL 1/3 OCTAVE PRECISION EQUALIZATION SYSTEM USERS MANUAL.
2 A lesis M-EQ 230 DUAL 1/3 OCTAVE PRECISION EQUALIZATION SYSTEM INTRODUCTION The A lesis MEQ-230 is a two channel, 30 band/channel, 1/3rd octave graphic equalizer which features a relay based power-up delay switching circuit to eliminate turn-on transients in sound systems.
3 SECTION 1 DESCRIPTION OF CONTROLS FRONT PANEL 1/3 OCTAVE BAND FADER Each 1/3rd octave band is controlled by a center detented fader which provides a boost or cut of 12dB. There are 30 bands per channel. MASTER CHANNEL GAIN FADER Each channel has a Master Gain Fader which controls the system's input gain by ± 12dB.
4 POWER JACK Accepts the +9VAC power from the M-EQ 230 Power Supply. This external supply keeps hum, noise, and ground loops to a minimum. SECTION 2 SET-UP INSTRUMENTS, MICROPHONES The A lesis M-EQ 230 has high impedance inputs that are ideally suited for use either with instruments or line level signals.
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 tuning while the left channel is connected to the on-stage monitor system for feedback control.
6 INTERFACING VIA INSERT SENDS AND RETURNS Another way of interfacing the M-EQ 230 is to connect the unit directly to the insert send and return patch points (if your console has them) of the channel that is to be effected.
7 SECTION 3 OPERATION POWER-UP When the power is first turned on, the automatic power-up delay circuit will mute the M-EQ 230 for 2 seconds. This is to prevent any possible turn-on transient signal from mixers, power amps, or outboard equipment from possibly damaging speakers.
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 FEEDBACK A. Find the 2 major feedback frequencies (1 high, 1 low frequency) B. Slightly decrease adjacent bands. ROOM FEEDBACK FREQUENCIES ADJACENT BANDS SLIGHTLY DECREASED A.
9 the same as simply raising the volume level. In this case, do the following: 1) With the instrument playing, start by boosting 3 sliders at a time until the offending frequency area is found. (If the Clip LED should light, turn down the Input control) 2) Now, decrease the sliders until you are cutting the level instead of boosting.
10 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 Re so nant ring at 200 to 240Hz; Presence .
SECTION 4 SPECIFICATIONS ELECTRICAL CHARACTERISTICS FREQUENCY RESPONSE 25Hz to 20kHz in 1/3 octave increments HARMONIC DISTORTION .004% @ 1KHz @ 0dBV INPUT NUMBER OF CHANNELS 2 NOMINAL LEVEL 0dBV MAXI.
An important point after buying a device Alesis M-EQ230 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Alesis M-EQ230 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Alesis M-EQ230 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Alesis M-EQ230 you will learn all the available features of the product, as well as information on its operation. The information that you get Alesis M-EQ230 will certainly help you make a decision on the purchase.
If you already are a holder of Alesis M-EQ230, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Alesis M-EQ230.
However, one of the most important roles played by the user manual is to help in solving problems with Alesis M-EQ230. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Alesis M-EQ230 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
