User manual ROLLS RPQ160B

[. . . ] RPQ160b Parametric Equilizer 30 20 LOW SHELF 50 100 200 2 HIGH SHELF 4 6 10 LEVEL 0 200 100 FREQ 400 600 900 WIDTH LEVEL 0 300 166 FREQ 800 LEVEL 1. 1k WIDTH 0 800 400 FREQ 2. 1k 3. 3k 7k 1. 5 400 CLIP -12 dB +12 1. 8k MADE IN USA www. rolls. com 16 ACTIVE HZ 500 1 KHZ 30 70 HZ 1. 5k 3 OCT . 3 -15 dB +15 150 HZ 3k 3 OCT . 3 -15 dB +15 300 HZ 10k EVEL 0 300 166 FREQ 800 LEVEL 1. 1k WIDTH 0 800 400 FREQ 2. 1k 3. 3k 7k WIDTH LEVEL 0 2k 900 FREQ 4k 6k 12k WIDTH LEVEL 0 1. 8k PARAMETRIC EQUALIZER RPQ160b POWER dB +15 150 HZ 3k 3 OCT . 3 -15 dB +15 300 HZ 10k 3 OCT . 3 -15 dB +15 600 HZ 20k 3 OCT . 3 -15 dB +15 www. rolls. com Rolls Corporation Salt Lake City, UT 06/09 QUICK START OPERATION GUIDE INSPECTION 1. If obvious physical damage is noticed, contact the carrier immediately to make a damage claim. [. . . ] NOTE: THERE IS NO BYPASS SWITCH FOR THE LOW OR HIGH SHELF FILTERS - SIMPLY TURN THE LOW SHELF COMPLETELY COUNTERCLOCKWISE, AND THE HIGH SHELF COMPLETELY CLOCKWISE TO BYPASS THESE CIRCUITS. LEVEL: Adjusts the overall signal level of the RPQ160. CONNECTION Turn off all equipment before making any connections. Mount the RPQ160 in a properly grounded rack, and make sure the rack is properly ventilated. Ambient temperatures should not exceed 113 degrees F (45 degrees C) when the equipment is in use. Route the AC power cord away from audio lines. NOTE: The following three descriptions are identical for all four bands of equalization. The band frequency ranges are listed below: Band 1: 70 Hz to 1. 5 kHz Band 2: 150 Hz to 3 kHz Band 3: 300 Hz to 10 kHz Band 4: 600 Hz to 20 kHz WIDTH: (Q): Varies the shape or width of the equalization being boost or cut from . 3 to 3 octaves wide. LEVEL: Boosts or cuts the signal of the indicated band from -15 to +15 dB. Power Switch: Applies power to the RPQ160 when the unit is connected to a properly grounded ac outlet. The Power LED will light when the RPQ160 is on. OPERATION The two shelving filters are designed to roll off the frequency response of the Signal; the Low Shelf cuts the frequencies 3 dB at the control's indicated setting and rolls off below, and the High Shelf cuts the frequencies 3 dB at the indicated setting and rolls of above. The Low Shelf Sweep Diagram shows the response curve of the Low Self filter at its minimum and maximum setting. OPERATION Cont. Shown below is the typical symmetrical response curve of a swept parametric band filter with the Frequency control set at 1 kHz, the Level set at +15 and -15 dB, and the Octave control set at . 3, . 5, 1, and 3. These curves remain consistent over the frequency spectrum, they simply shift to whatever frequency setting is indicated by the Frequency control. [. . . ] Live applications include equalizing trouble spots where a mix may be muddy, too harsh, flat, and even eliminate feedback precisely without affecting the flavor of the overall sound. Recording studios benefit from the RPQ160's precise equalization in notching out trouble frequencies that need to be removed, or by re-equalizing a final mix. [. . . ]