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  1. #1

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    Default What to set crossover on sub?

    I ran auto setup with the yamaha 1800 the crossover is set at 60 hz. What should I set my sub crossover to be?

    Thanks
    Ken
    Receiver: Onkyo TX-SR805
    Amp: Emotiva XPA-5
    Front: LSI15
    Center: LSIC
    Sourround: FxiA4
    Rear: Fxi3
    Sub: Bic H100
    TV: Sony 52' XBR4


    "The more time you spend researching here, the less money you will have" :D

  2. #2

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    So, are you saying that the crossover in the receiver is set at 60? If so, then turn the crossover on the sub all the way up.

  3. #3

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    unless you have a x-over bi-pass on your sub..

  4. #4

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    Both suggestions will give the same result.

  5. #5

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    Quote Originally Posted by Willow View Post
    unless you have a x-over bi-pass on your sub..
    Correct, use the LFE in on your sub if you're using your receiver's crossover.
    "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche

  6. #6

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    Anyone know what I should set my sub crossover to? It is a KLH powered sub and I have the Monitor 7cs. Thanks!!!

  7. #7

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    Quote Originally Posted by Mike Kozak View Post
    Anyone know what I should set my sub crossover to? It is a KLH powered sub and I have the Monitor 7cs. Thanks!!!

    The 7's do well down to 60hz (actually well down to ~40-35hz). But 60hz seems to do a great job.
    Monitor 7b's front
    Monitor 4's surround
    Frankinpolk Center (2 mw6503's with peerless tweeter)
    M10's back surround
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    Jennings Research (vintage and rare)
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  8. #8

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    Thanks Jake!!!

  9. #9

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    YW, but actually for HT use 80hz is good also. It really depends on the sub. I have had mine @ 80hz for HT use then switch to Large + sub for music. So any where between 60-80hz should do just fine
    Monitor 7b's front
    Monitor 4's surround
    Frankinpolk Center (2 mw6503's with peerless tweeter)
    M10's back surround
    Hafler-200 driving patio Daytons
    Tempest-X 15" DIY sub w/ Rythmik 350A plate amp
    Dayton 12" DVC w/ Rythmik 350a plate amp
    Harman/Kardon AVR-635
    Oppo 981hd
    Denon upconvert DVD player
    Jennings Research (vintage and rare)
    Mit RPTV WS-55513
    Tosh HD-XA1
    B&K AV5000


    Dont BAN me Bro!!!!

  10. #10

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    I'm a big fan of 65 Hz. Kind of like a favorite number.

  11. #11
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    For HT, THX recommends 80Hz. A lot of people don't like the THX stuff, but they do know their HT. I would say try a few different setting and see what sounds the best. Your ears will know.

  12. #12

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    A lower setting allows the sub to be 'hidden'. Your ears will not be able to locate frequencies below about 80 Hz. A higher freq can avoid excessive power from going to the mains, and therefore improve their distortion as well.

    Trial and error is the best bet. You won't notice a big difference going from 60 to 80 Hz anyway.

  13. #13

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    Well the adjustment know on the back starts at 40hz and goes to 180hz, so I am thinking that not even a quarter turn to get to 60-65hz?

  14. #14

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    What would folks say is the general 'rule of thumb' for sub crossover setting?

    Is it 30Hz above the -3db lower frequency response of your mains?

    Or more?

    Thanks,
    Erik

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    The rule of thumb is to choose a frequency where both the sub and mains have a flat response.

    For example, I have a bandpass subwoofer at home(coffee table) that has a response of 25 Hz to 65 Hz. The mains are bookshelves that have a -3 dB of 60 Hz. I am stuck with a crossover freq of 65 Hz if I expect a smooth frequency response. Since the sub naturally rolls off at the desired frequency, I have the sub xover set to 120 Hz(bypass sorta).

    The higher you can go(75, 80, 85), the more power you can safely drive the mains with.

    The lower you go(55, 60, 65), the more punchy bass comes from the mains and it makes the sub more 'transparent'.

    If I have a sub designed for 20 Hz to 200 Hz and mains that can play flat down to 120 Hz, I would have no choice but to set the crossover higher than 120 Hz. A change of 30 Hz at this point will make very little difference.
    Last edited by ShinAce; 01-21-2008 at 06:32 PM.

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