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Thread: low pass filter

  1. #1

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    Default low pass filter

    ok i've got a pair of rti70's. I need to know what to set my sub's low pass at. 50Hz? 80Hz? i don't know. The sub is hooked up via high level input.

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    also there is a button where i can select -3db, 0db, or +3db. which do i want? also with the phase, 180, or 0?

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    What kind of sub is it, why are you using a high level connection, and what is the rest of the system and your intended application (HT/music)?
    "What we do in life echoes in eternity"

    Ed Mullen (emullen@svsound.com)
    Director - Technology and Customer Relations
    Specialty Technologies
    SVSound

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    Default Dr. Spec

    Well i don't quite know much about audio and stereo's but i know what i want. The sub-woofer is a Sound Dynamics THS 3000, it is a down firing 12 inch 150 watt sub with an aluminum plate underneath. For now I am using an old Technics intergrated amp and I'm thinking shortly on buying a refurbished HK 3475 off of HarmanAudio.com. I use the system for music and movies. And I don't know why I am using the high level input, just don't know what else to use.

    I need help!

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    I have the 70's and over all thy are a great pair of fronts for the $. I would sugg getting that HK amp as it would do more justice to them. Do you have them Bi-Wired? If not go for it! As far as the sub ? Doc will cover that as i know nothing of that nature..:) Yet!





    Spastic

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    spastic,

    I currently do not have them bi-wired but intend on it when I get my new receiver. Do you believe the HK3475 with 110 watts/ch. or HK3470 with 100 watts/ch. would power the RTi70's sufficeintly? What about the HK3375 with 75 watts/ch. or the HK3370 with 70 watts/ch. What are you powering yours with?

    Thanks for your reply

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    I'm still on my starter amp - Onkyo TXSR500 which of is ok for now as for as the HK's you mentioned ...in my opinion...The more the better (Clean watts that is) :)

    FYI you can still Bi-wire them even with the amp you have now. Go For it!

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    spastic

    how do you like your onkyo and what are you planning up upgrading to?

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    Well for a starter i love it. As far as what i would upgrade to , not too sure. I have been upgrading speakers for the last year so i havent spent too much time researhing receivers. But from what i have heard, read and the research i have done probably another Onkyo or a Denon. Cant go wrong with either in my opinion.

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    spastic,

    just wondering but what do you think about the Harman Kardon HK3475 for a 2 CH. rig?

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    from the specs looks like a good rig, only one way get it and try it, if you dont like it take it back

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    from the specs looks like a good rig, only one way get it and try it, if you dont like it take it back

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    If your pre/pro has a bass management circuit and a subwoofer pre-out, then I suggest going that route. If it is a home theater unit, it almost has to have a BM circuit and a sub-out. If not, then you will be forced to go with a high level connection.

    With a sub pre-out, set all your speakers to small and the sub to on/yes. Disable the filter on the subwoofer if it has that feature. If not, set the subwoofer filter to its highest frequency to avoid filter cascading.

    With a high level connection, set all your speakers to small except the mains. Set the mains to large and the sub to no/off.

    If this is a strictly two channel rig with no BM circuit and no sub pre-out, then just go with a standard high level connection to the sub and then wire back to the mains.

    For music and HT, I prefer an 80 Hz crossover. For music alone, you can go a bit lower, but the RTi70 is hardly a bottom feeder with a -3 dB of 42 Hz and will function well with a 60-80 Hz high pass.

    While I wouldn't know unless I looked at the owner's manual, I suspect the -3, 0, and +3 might control a bass boost function at a specfic frequency. I would leave it at 0 for now until you learn more about its function.

    Set the phase to 0 if the sub will be near the mains. If the sub is away from the mains, experiment and use the setting which gives you a stronger and more coherent bass response. Sometimes it will be hard to tell the difference between the two, and other times it will be obvious as all rooms are different.

    Doc
    "What we do in life echoes in eternity"

    Ed Mullen (emullen@svsound.com)
    Director - Technology and Customer Relations
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    Dr. Spec

    Thanks for the reply. I also have a PSW202 and don't know what to do with it. Should I hook it up with the RTi70's and the Sound Dynamics THS 3000 subwoofer or leave it aside? Let me know what you think!

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    Get a Y splitter and fire it up! Why waste it?
    "What we do in life echoes in eternity"

    Ed Mullen (emullen@svsound.com)
    Director - Technology and Customer Relations
    Specialty Technologies
    SVSound

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    will do

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