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Help with new amp/sub install

Discussion in 'Audio & Video' started by amthree, Mar 30, 2011.

  1. Mar 30, 2011 at 3:15 PM
    #1
    amthree

    amthree [OP] Active Member

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    I have been searching for the last couple of days and have not found any info regarding this particular question. I do have to say that the members on this board are awesome and the info has been used to install a HU/amp/sub/and 6.5 components up front. I haven't done something like this in 15+ years...:D

    Ok well now to the question.

    I have components up front and i currently have the High pass filter on the amp. should i just use the crossover that came components alone and run the signal straight thru, or is it common to use the High pass crossover built in on the amp in conjunction with the component crossovers??
     
  2. Mar 30, 2011 at 4:13 PM
    #2
    kristonex

    kristonex Well-Known Member

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    Either way is fine. If you turn your high pass on your amp, it just won't send those lower frequencies to your components to begin with. If you set the amp filter to off it will send signals full range to your components where the crosovers within the components will do all the work of cutting off those lower frequencies. I hope this helps its kinda confusing. Lets say for example you have your amp LP filter set to 200Hz then your components are pre-set at 150Hz your speakers will run above 200Hz. If it where the other way around it works out the same. Its whatever your highest setting is for low pass
     
  3. Mar 30, 2011 at 4:27 PM
    #3
    jab08

    jab08 Well-Known Member

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    Whats the range on the high pass filter on your amp? Since you say you have components you have to remember the tweeters also, you want the crossover point on them to be around 2k or so. Anything below that depending on what kind of tweeter you have will either crap out or distort really bad. That said not many "budget" amps have that kinda crossover point.
     
  4. Mar 30, 2011 at 7:34 PM
    #4
    mattg43

    mattg43 Well-Known Member

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    Is it safe to assume you are using the passive crossovers that came with the components.

    If that is the case, to my knowledge, no passive component system on the market has any kind of filter or high pass for the low end. They allow the midwoofer to roll off naturally, and to answer your question, it is ALWAYS best to use a filter if it is available.
     
  5. Mar 30, 2011 at 7:37 PM
    #5
    mattg43

    mattg43 Well-Known Member

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    I think you are referring to him running active, which is an important consideration - but I would still recommend using high pass filters on both tweets and mids.
     
  6. Mar 30, 2011 at 8:11 PM
    #6
    amthree

    amthree [OP] Active Member

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    Thanks for the input, it does help...i just need to do some testing tuning....

    The specs aren't that clear or I may be misunderstanding something.
    Filter knob has 4 labels starting on the lower left of the circle it goes 50, 100,200 then 300Hz. all evenly spaced and spanning the circle.

    am i missing something....it hertz like kb and mb in the computer world.

    specs on the amp say 50-300 Hz, 12dB/oct

    specs for the components say
    sensitivity86±2 dB
    45-36000Hz
    crossover frequency 5,000 Hz

    i feel so silly...lol
     
  7. Mar 30, 2011 at 8:14 PM
    #7
    amthree

    amthree [OP] Active Member

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    i think im leaning that way...better to be safe than sorry. I want a clean sound... doesn't have to be super loud...I guess I am trying to maximize what I have.

    sounds okay right now...i have both filters on.
     
  8. Mar 30, 2011 at 8:15 PM
    #8
    amthree

    amthree [OP] Active Member

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    things are getting clearer...lol
     
  9. Mar 31, 2011 at 6:26 AM
    #9
    mattg43

    mattg43 Well-Known Member

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    Without specifics of the install, I would try somewhere around 80hz as the highpass for the mids, and around 80hz for the lowpass on the sub. Should be good to go.
     
  10. Mar 31, 2011 at 9:21 AM
    #10
    amthree

    amthree [OP] Active Member

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    Ill give that a try as a starting point....I should have some time today to do it and ill let you know the results.

    It is a good starting point. I need to post a really good detailed post in the next few days and that should make it clear. It might help others on a tight budget build a system. thanks for the feedback.
     
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