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QSC Audio SF-1 manual

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Table of contents for the manual

  • Page 1

    9 SF-1 Subw oof er Filter Rev. A Owner’ s Manual FPO[...]

  • Page 2

    10[...]

  • Page 3

    1 SF-1 SUBWOOFER FIL TER INTRODUCTION The SF-1 Subwoofer Filter is an upper slot accessory for QSC MXa Series amplifiers, which feature Level One Open Input Architecture. The accessory mounts in the back of the amplifier above the standard input panel. Ideal for adding subwoofer amplification to an existing full-range system, the SF-1 offers adjust[...]

  • Page 4

    2 CONFIGURA TION SETTING THE SUBSONIC FILTER FREQUENCY The subsonic (highpass) filter on Channel 1 cannot be bypassed, and Channel 2 should only be bypassed in the bridged mono mode. Plug-in SIP resistor network RN3 sets the high-pass frequency for both channels 1 and 2. Table 2 shows the resistor value to be used for the frequency you desire. Typi[...]

  • Page 5

    3 • Stereo, Bridged Mono, and Parallel Mono If the two subwoofer channels are to carry different or independent program material, as in stereo or bridged mono, set the SF-1 for “Stereo” operation. Use this also for parallel mono operation from a single program signal source. For stereo, bridged mono, or parallel mono operation, set the amplif[...]

  • Page 6

    4 INST ALLA TION Before installing the SF-1, disconnect the amplifier’s power cable from the AC mains. 1. Position the amplifier so that the rear panel is facing you. Locate the input panel and the blank accessory panel above it. 2. Remove the four mounting screws—the two holding the blank panel and the two holding the standard input panel. Rem[...]

  • Page 7

    5 SPECIFICA TIONS SIGNAL TO NOISE RATIO (22 Hz to 22 kHz): 103 dB TOTAL HARMONIC DISTORTION <0.1 % CROSSTALK 70 dB below rated power within passband CMRR: better than 50 dB FILTER TYPE second-order butterworth, Q=0.707 (LPF and unboosted subsonic filter) second-order, +6 dB boost, Q=2 (boosted subsonic filter) DIP SWITCH FUNCTIONS TABLE 3 — DI[...]

  • Page 8

    6 APPLICATION NOTES For cinema surround channels and subwoofers that do not require an EQ boost, use the following switch settings. SW1 slide switch- BOOST OFF SW2 DIP switch Position 1 ON Position 2 OFF Position 3 OFF Position 4 ON Position 5 ON Position 6 OFF Position 7 ON Position 8 OFF Position 9 ON if bridged mono, OFF otherwise Position 10 OF[...]

  • Page 9

    7 APPENDIX A: W ARRANTY & DISCLAIMERS DISCLAIMER QSC Audio Products, Inc. is not liable for any damage to speakers, amplifiers, or any other equipment that is caused by negligence or improper installation and/or use of the SF-1 Subwoofer Filter. PRODUCT WARRANTY QSC Audio Products, Inc. guarantees the SF-1 Subwoofer Filter to be free from defec[...]

  • Page 10

    8 QSC TECHNICAL SERVICES DEPARTMENT 1675 MacArthur Blvd Costa Mesa, CA 92626 Telephone: (800) 772-2834 (714) 957-7150 (714) 754-6175 Fax: (714) 754-6173 Bulletin Board: (714) 668-7567 (800) 856-6003 INTERNATIONAL SERVICING For QSC products that are purchased outside of the United States, service must be referred to the distributor or dealer from wh[...]

  • Page 11

    11[...]

  • Page 12

    12 QSC AUDIO PRODUCTS, INC. 1675 MacArthur Blvd., Costa Mesa, CA 92626 USA Ph (714) 754-6175 Fax (714) 754-6174 Email INFO@qscaudio.com W eb http://www.qscaudio.com “ QSC ” and the QSC logo are registered with the U.S. Patent and Trademark Office.[...]