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SC281675 MacArthur Blvd., Costa Mesa, CA, 92626 USA
Main Number (714) 754-6175 or toll free (USA only) (800) 854-4079
Customer Service(714) 957-7150 or toll free (USA only) (800) 772-2834
Loudspeaker Signal Processing Products User Manual
SC28 Two-Input, Eight-Output System Controller for QSC Loudspeakers
*TD-000238-00*
TD-000238-00 rev.C
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IMPORTANT SAFETY PRECAUTIONS & EXPLANATION OF SYMBOLS The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated “dangerous” voltage within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to humans. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in this m
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Introduction Congratulations and thank you for your purchase of this professional, loudspeaker signal processing product. To get the most from your investment, we recommend you review all the information provided in this User Manual. The SC28 is a two-input, eight-output signal processor intended for use with QSC loudspeakers and QSC power amplifiers. The SC28 provides QSC system-specific signal processing for getting the highest performance and superior sound quality from QSC loudspeakers in
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Unpacking There are no special unpacking precautions. However, it is recommended you keep the original packing material for reuse in the rare event that service be required. If service is required and the original packing material is not available, ensure that the unit is ade- quately protected for shipment (strong box of appropriate size, sufficient packing material to prevent load-shifting or impact damage) or call QSC’s Technical Services Department for packing material and a carton. What i
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Audio Inputs On the rear panel, there are two female XLR line-level inputs marked INPUTS below Input connectors the connectors and designated A and B above the connectors. Connect the line-level analog audio inputs to these connectors. Input sensitivity can be selected from the Setup Menu; selections are 1.5 V /6 dBu, 3 V /12 dBu, 9 V 21 dBu, or 18 V / rms rms rms/ rms 27 dBu. These values correspond to the maximum input signal level that can be applied to the inputs without clipping. The si
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Use General Information Use of the SC28 involves adherence to the following to achieve proper operation: 1- Input sensitivity for the SC28 must be set to correspond with expected audio source levels. 2- Crossover type must be selected to correspond with amplifier and loudspeaker setup (Biamp or Triamp) 3- Subwoofer operation must be enabled or disabled. If enabled, subs can be configured as stereo or summed (mono) and sub gain can be adjusted for more or fewer subwoofers than a typical system.
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LED Indicators LED metering of both input and output are provided. Input metering is indicated as relative to 0 dBfs (digital clipping of the input signal) and output metering is indi- cated in actual output voltage levels in dBu. Meters are peak-reading and updated every 50 milliseconds. Input metering for the SC28- Note digi- tal clipping will be indicated by ONLY The lower input metering LEDs will remain illuminated the top red LED being illuminated. as successively higher levels are in
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8 LCD Navigation Map- Setup Setup Menu EQ Menu Mute Menu Utility Menu ‡ Input Sens Array Config Array Size Total Splay Subwoofer Sub Management ‡ Sub Gain ‡ Sub Delay 1 . 5Vrms / 6dBu Bypass / Thru 1-16 box 1-75 degrees None Mono Sum - 12 . 0 - 12 . 0 dB 0 . 00 - 50 . 00 ms 3Vrms / 12 dBu ILA 2way Bypass / Thru Stereo 9 Vrms / 21 dBu ILA 3way > LF < WL-115 sw 18 Vrms / 27 dBu WL/GP-212 sw ILA 3way < LF > WL/GP-218 sw WL8 3way >LF < WL8 3way WL10 2way WL10 3way WL10 3way REV ‡ Array Delay L
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9 LCD Navigation Map- Equalization
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10 LCD Navigation Map- Gain
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11 LCD Navigation Map- Utility
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12 Signal Flow
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Dimensions 13
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Preliminary Specification Dynamic Range (AES-17, -60 dB Method, all sensitivities) unweighted >104 dB A weighted >107 dB Distortion (AES-17, 20 Hz-20 kHz, all sensitivities) +4 dBu <0.006% THD+N 2 dB below clip (max) <0.006% THD+N Crosstalk (20 Hz - 20k Hz) inter-channel (max) >75 dB Input Impedance Balanced (nominal) 11k ohms Unbalanced (nominal) 69k ohms Common-Mode Rejection 20 Hz - 20k Hz (min) >75 dB 20 Hz - 20k Hz (typ) >80 dB Input Sensitivities 1.5 V /6 dBu, 3 V /12 dBu, 9 V 21 dBu, or 1
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Preliminary Specification USB Port USB type “B” USB Cable 1.5 meters long, USB 1.1 compliant AC Power Requirements 100-240 VAC, 50-60 Hz, no user adjustment required AC Power Connection IEC-type inlet AC Power Cord 2 meters long, #18AWG Specifications are subject to change without notice. 15
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Warranty (USA only; other countries, see your dealer or distributor) Disclaimer QSC Audio Products, LLC is not liable for any damage to amplifiers or any other equipment that is caused by negligence or improper installation and/or use of this loudspeaker product. QSC Audio Products 3 Year Limited Warranty QSC Audio Products, LLC (“QSC”) guarantees its products to be free from defective material and / or workmanship for a period of three (3) years from date of sale, and will replace defective
