What to set crossover on sub?

Gizmo99
Gizmo99 Posts: 169
edited January 2008 in Speakers
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
Post edited by Gizmo99 on
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Comments

  • seeclear
    seeclear Posts: 1,243
    edited January 2008
    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.
    "Don't forget to change your politician. They are like diapers they need to be changed regularly, and for the same reason."
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  • Willow
    Willow Posts: 11,064
    edited January 2008
    unless you have a x-over bi-pass on your sub..
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  • ShinAce
    ShinAce Posts: 1,194
    edited January 2008
    Both suggestions will give the same result.
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  • Face
    Face Posts: 14,340
    edited January 2008
    Willow wrote: »
    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
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  • Mike Kozak
    Mike Kozak Posts: 931
    edited January 2008
    Anyone know what I should set my sub crossover to? It is a KLH powered sub and I have the Monitor 7cs. Thanks!!!
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  • jakelm
    jakelm Posts: 4,081
    edited January 2008
    Mike Kozak wrote: »
    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
    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!!!!:eek:
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  • Mike Kozak
    Mike Kozak Posts: 931
    edited January 2008
    Thanks Jake!!!
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  • jakelm
    jakelm Posts: 4,081
    edited January 2008
    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!!!!:eek:
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  • ShinAce
    ShinAce Posts: 1,194
    edited January 2008
    I'm a big fan of 65 Hz. Kind of like a favorite number.
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  • zingo
    zingo Posts: 11,258
    edited January 2008
    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.
    Jake
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  • ShinAce
    ShinAce Posts: 1,194
    edited January 2008
    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.
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  • Mike Kozak
    Mike Kozak Posts: 931
    edited January 2008
    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?
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  • Erik Tracy
    Erik Tracy Posts: 4,673
    edited January 2008
    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

    H9: If you don't trust what you are hearing, then maybe you need to be less invested in a hobby which all the pleasure comes from listening to music.
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  • ShinAce
    ShinAce Posts: 1,194
    edited January 2008
    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.
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