User manual ALESIS DEQ830

[. . . ] 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Table Of Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Welcome!. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 DEQ830 Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 How to Use This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Important Safety Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Important Safety Instructions (English) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] The original factory Program 00 is a "flat" program, and it's easy to see why it's called that--the gain setting for every band is 0 dB. Calling up this program is almost the same as pressing the Bypass button, in that the audio passing through the unit will not be equalized in any way. Of course, the difference is that you can edit the program and hear the changes that you make. If you don't already know what kind of EQ you're looking for, this may be a good place to start. Just as Program 00 is a "flat" program, Curve 00 is a "flat" curve. We strongly recommend that you leave Curve 00's gain settings at 0 so that you may use it as a "clean slate" for building new curves from the ground up. Single Band Edit Pressing a [BAND SELECT] button puts the DEQ830 into Edit mode. The Numerical LED Display will now display the gain value in decibels (dB) of the band you just selected. In addition, one of the Band Gain LEDs above that [BAND SELECT] button will start blinking. If it is higher or lower than that, one of the yellow LEDs will blink. Turning the [VALUE] encoder left will lower the gain value, or "cut" the chosen frequency; turning it right will raise the gain value, or "boost" the frequency. There is an overall range of +/- 12 dB of gain change available. 34 Basics of Equalization Band Solo The DEQ830 has a handy feature called Band Solo that allows you to "isolate" a given frequency while you are editing. This can help you determine exactly which band you need to highlight or deemphasize. Release the [BAND SELECT] button, and the value of that band will be returned to its original setting. This only works with one band at a time, but you'll find it to be a very helpful feature. Band Gain Cut/Boost Ranges Whether you are cutting or boosting a band, gain change happens in 0. 5 dB increments. As you make the change, the Numerical LED Display will show you the magnitude of the gain: 0. 5, 1. 0, 1. 5, 2. 0, . . . Because it's not possible to show a minus sign in the LED display for negative gain values, you'll see the same sequence as you turn the encoder to the left. But if there's any doubt in your mind about which way you're going, the Band Gain LED will clue you in. As soon as you move 0. 5 dB away from 0, the LED for that band will change from green to yellow. If you are cutting the frequency, you'll see a yellow light below the center line. Since the front panel only has thirteen gain LEDs to represent the 49 possible levels of gain in each band, you may not see the LED change when you make small adjustments to the gain. The table on the following page shows the amount of change in dB it takes to light each of the Band Gain LEDs: 3 If you want to keep an edited curve or program, be sure to store it. For instructions on how to do this, turn to page 40. 35 3 Basics of Equalization LED + 12 dB + 10 dB + 8 dB + 6 dB + 4 dB + 2 dB 0 dB - 2 dB - 4 dB - 6 dB - 8 dB - 10 dB - 12 dB Gain Change 11. 5 ­ 12. 0 dB 9. 5 ­ 11 dB 7. 5 ­ 9. 0 dB 5. 5 ­ 7. 0 dB 3. 5 ­ 5. 0 dB 0. 5 ­ 3. 0 dB 0 dB 0. 5 ­ 3. 0 dB 3. 5 ­ 5. 0 dB 5. 5 ­ 7. 0 dB 7. 5 ­ 9. 0 dB 9. 5 ­ 11 dB 11. 5 ­ 12. 0 dB 36 Basics of Equalization Multiple Band Edit Selecting an Edit Group Pressing a [BAND SELECT] button puts the DEQ830 into Edit mode. [. . . ] 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. 63 5 Troubleshooting This page intentionally left blank. 64 Specifications Rear Panel I/O (switchable) Analog: Input Connectors: Output Connectors: Digital: Input Connector: Output Connector: 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: MIDI: MIDI Input: MIDI Output: 8 balanced 1/4" TRS jacks 8 balanced 1/4" TRS jacks 1 ADAT Optical 1 ADAT Optical +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 1 5-pin female DIN 1 5-pin female DIN All measurements done over a 22 Hz - 22 kHz range with 1 kHz sine wave at -1dBFS input. Impedances are measured at 1 kHz. Audio Performance Signal To Noise Ratio: THD+N: Frequency Response: Power Consumption: >100dB 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. [. . . ]