User manual ALESIS DEQ230

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Manual abstract: user guide ALESIS DEQ230

Detailed instructions for use are in the User's Guide.

[. . . ] Reference Manual This page intentionally left blank 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Table Of Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Welcome!. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 DEQ230 Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 How to Use This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Important Safety Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Important Safety Instructions (English) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] The Relative Gain display reads "0. " If you press the [UP] button and keep holding it, you will see that number change from 0 to 12 (see fig. But it won't stop at 12; it will keep racing If the Numeric LED Display shows "Li" when you press [BAND SELECT] buttons on Channel B, it means the channels are linked. Either make the edits on Channel A, or return to Program mode and press [LINK/EXIT] to unlink the channels. In Multiple Band Edit mode, pressing the [DOWN/UP] buttons at the same time will reset the Relative Gain Display to 0. This resets the bands within the Edit Group back to their original values. From this point you can change the Relative Gain of the Edit Group in 2 dB increments by holding one of the [DOWN/UP] buttons and pressing the other one repeatedly. For maximum preservation of fidelity of the input signal, the largest number of bands in a channel should be set to 0 dB. For example, if you have more than half of your bands set to some cut amount and the majority of those cut frequencies are at -4 dB, then select all bands and compensate by +4 dB. 34 Basics of Equalization upward until it reaches 24. This is because that's how far the band that was set to -12 dB had to travel until it hit the "ceiling, " or + 12 dB (see fig. 2). 3 But what about the band that was set to 0 dB originally. . . was it boosted to +24 dB?The answer is, "Yes and no. " It was, in the sense that the DEQ230 keeps track of the proportional values of the bands, even if they exceed the +/-12 dB limit of gain change for a frequency. The reason the DEQ230 keeps track of the gain relationship between the bands in the Edit Group is simple. It's so you can change your mind, pull them back down to values within the +/12 dB limit, and still have them be the same distance apart!For example: let's say you decided these frequencies have been boosted too much, and you cut them by 12 dB. At this point the Relative Gain display would read "12, " with band one's Gain LED at +12 dB and band two's Gain LED at 0 dB (as in fig. So far you haven't really reduced the gain of the first band, because it's still at +12 dB. You still want to bring it down a bit, so you take both frequencies down another 3 dB. So now the Relative Gain display would read "9, " with band one's Gain value at +9 dB and band two's Gain value at -3 dB. And now you can see that the gain relationship between the two bands was preserved; they're still 12 dB apart. Remember, pressing the [DOWN/UP] buttons at the same time will reset the Relative Gain Display to 0. From this point you can change the Relative Gain of the Edit Group in 2 dB increments by holding one of the [DOWN/UP] buttons and pressing the other one repeatedly. This can be a real time-saver if you want to get from a Relative Gain value of +24 to a value of ­24! 35 3 Basics of Equalization One important note, though; Proportional Gain Memory is only temporary. If you have run one or more bands "past" the +/-12 dB limit and then you exit Edit mode for any reason (such as to store the program), the gain value of those bands will be remembered as +/-12 dB (whichever was the value that was last reached for those bands). The Limits of Relative Gain There will be times when the Relative Gain display will not go all of the way up or down to a value of 24. This is because the DEQ230 takes into account the gain setting of all of the bands when an Edit Group is formed. [. . . ] Customers outside of the USA and Canada are not covered by this Limited Warranty and may or may not be covered by an independent distributor warranty in the country of sale. Do not return products to the factory unless you have been given specific instructions to do so. Internet Address: Important information and advice is available on our web site: http://www. alesis. com Email may be addressed to Support@alesis. com. 73 6 Troubleshooting This page intentionally left blank 74 Specifications DEQ230D Analog I/O (switchable) Input connectors: Output Connectors: Switch set to +4: Nominal input level: Maximum input level: Nominal Output Level: Maximum Output Level: Switch set to ­10: Nominal input level: Maximum input level: Nominal Output Level: Maximum Output Level: Input impedance: Output Impedance: 2 balanced 1/4" TRS jacks 2 balanced 1/4" TRS jacks +4dBu (-15dBFS) +19dBu (6. 9 Vrms) +4dBu (-15dBFS) +19dBu (6. 9 Vrms) -10dBV (-16dBFS) +6dBV (2. 0 Vrms) -10dBV (-16dBFS) +6dBV (2. 0 Vrms) 10k 220 All measurements done over a 22 Hz - 22 kHz range with 1 kHz sine wave at -1dBFS input. Impedances are measured at 1 kHz. DEQ230 Input connectors: Output Connectors: Nominal input level: Maximum input level: Nominal Output Level: Maximum Output Level: Input impedance: Output Impedance: 2 balanced 1/4" TRS jacks 2 impedance-balanced 1/4" TRS jacks -10dBV (-18dBFS) +8dBV (2. 5 Vrms) -10dBV (-18dBFS) +8dBV (2. 5 Vrms) 10k 220 Audio Performance Signal To Noise Ratio: THD+N: Frequency Response: Power Consumption: >96 dB A-Weighted, Analog In to Analog Out <0. 005%, Analog In to Analog Out 22-22kHz ± 0. 50dB, Analog In to Analog Out 15 Watts Max (100-240 VAC / 50-60 Hz) Mechanical Size: Rack Spaces: Weight: 1. 75" H x 19. 0" W x 5" D 1 Space 3. 0 lbs. [. . . ]

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