Hey SVS guys, How to safely use my 20-39CS+ with a BFD as a subsonic filter

Discussion in 'Archived Threads 2001-2004' started by Troy_K, Nov 13, 2002.

  1. Troy_K

    Troy_K Stunt Coordinator

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    I've heard that the PC and PCi series subs have built in limiters or subsonic filters to prevent damage. The passive CS, CS+ and Ultra models do not. Obviously there is an advantage to both.

    Due to recent trends in HOT DVDs like LOTR and AOTC, I'm thinking I should set a filter or two on my BFD to help save my 20-39 cs+ from destroying itself. I don't want to lose all my awesome extension down low, but I don't want to break my sub either. I find no current need for the port-blockers, so I don't use them. I have plenty of extension at 16hz at my listenning position - same as 20hz without EQing.

    What would be a good solution? Is this even possible with the BFD? I want to safely crank my system to exploit my sub's possibilities without worrying about damaging it.

    Thanks,
    Troy
     
  2. jeff lam

    jeff lam Screenwriter

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    The only way to cut lower frequencies than 20Hz is to cut 20Hz with a filter and use other filters to bring back up the 20Hz and up frequencies. It will take a lot of time and experimenting and probably your entire filter bank. My advise is to just deal with the low frequencies. Going to so much trouble for just a couple DVD's isn't worth it IMO.


    You could just get a subsonic filter or have one built for you.
     
  3. VinhT

    VinhT Second Unit

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    You could just purchase a 20Hz line-level high pass. Parts Express has one (item #266-246).
     
  4. John Geelan

    John Geelan Screenwriter

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