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QSC SF-1 Owner's Manual
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QSC SF-1 Owner's Manual

QSC SF-1 Owner's Manual

Subwoofer filter
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SF-1
Subwoofer
Filter
FPO
Rev. A
9

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Summary of Contents for QSC SF-1

  • Page 1 SF-1 Subwoofer Filter Rev. A...
  • Page 3 The filter slopes are 12 dB per octave, and the filter frequencies are programmable via provided SIP resistor networks. A slide switch, SW1, allows you to configure the SF-1 with a low-end “boost” which provides a suitable equalization for use with B6 speaker enclosures. A 10-position DIP switch, SW2, affords you the versatility of setting the accessory in many different configurations, such as mono summing and single channel bypass.
  • Page 4 CONFIGURATION 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.
  • Page 5 9 and 10, are complementary. That is, if position 1 is “ON,” 2 must be “OFF” and vice versa; if 3 is “ON,” 4 must be off, and so on. To prevent improper operation of the SF-1 and the amplifier, and possible damage that may result to the accessory, amplifier, or loudspeaker, check your switch settings carefully before you install the SF-1 in your amplifier.

  • Page 6: Installation

    6. Connect the ribbon cable from the amplifier (the cable you disconnected from the input panel card) to the SF-1 circuit board, using J3 (figure 2c) . Make sure the cable is not twisted; the red stripe on the cable should be toward the right, from your point of view. Newer amplifiers have a keyed connector on the ribbon cable.

  • Page 7: Specifications

    SPECIFICATIONS 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...

  • Page 8: Application Notes

    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 Position 2 Position 3 Position 4 Position 5 Position 6 Position 7 Position 8 Position 9...

  • Page 9: Appendix A: Warranty & Disclaimers

    APPENDIX A: WARRANTY & 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.

  • Page 10: Appendix C: Important Address And Telephone Information

    (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 where the product was purchased. There are numerous service centers in many countries. The service centers in your country may be located by your dealer, distributor, or by contacting QSC Technical Services.
  • Page 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 Web http://www.qscaudio.com “QSC” and the QSC logo are registered with the U.S. Patent and Trademark Office.

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