Corrected in-room response for my dual Maelstrom Sonotubes, open & closed Port Valves

Discussion in 'Home Theater Projects' started by Mike Keith, Jan 10, 2004.

  1. Mike Keith

    Mike Keith Second Unit

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    I have posted some graphs for the final room response of my Maelstrom Sonosubs, for both Vented (Port Valves open) and sealed (Port Valves closed). There amazingly similar after the BFD is engaged, but they were night and day different before correction.

    Somebody over at Audio Karma mentioned that using very narrow Q filters have a ringing side effect during complex signals like music, can anyone corroborate this with experience, and how would you know if there was ringing at cretin frequencies while playing music?

    So far I've broken all the rules about over Equalizing but I can't find any side effects, am I missing something?

    http://www.diyaudio.com/forums/showt...941#post299941
     
  2. Wayne A. Pflughaupt

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    Mike,

    Do you mean rules like "always cut, never boost," "don't apply drastic amounts of EQ," etc.? If I had caught one of your posts inquiring about that, I would have let you know most of them are hogwash - but you've already figured that out. Not that the "rules of equalization" don't have merit; they do. They just don't apply to EQing subs.

    Regards,
    Wayne A. Pflughaupt
     
  3. Mike Keith

    Mike Keith Second Unit

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    Thanks Wayne, I value your opinion after reading many of your excellent responses on many threads.



    Yes, I have made boosts of 12db, used all 12 filters, done the broad Q boost at low frequencies, all the stuff I have been told is a major no-no. But my final measurements after correction have shown no ill effects, nor do my ears. All I know is now it's far smother in the lower registers, where before correction there were many audible irregularities, at this point I am ready to proclaim a Digital PEQ the best $115 tweak I've ever found. I would have never thought to use a piece of equipment like the BFD if it wasn't for this forum, thanks guys and thanks Wayne for your insight.
     
  4. Frank Carter

    Frank Carter Screenwriter

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    I agree with that, I'll never have another sub in my HT without an eq.
     

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