30hz subsonic

cadenceclipse
cadenceclipse Posts: 459
edited October 2009 in Car Audio & Electronics
so i'm looking for a sub amp. checking out pa1200.1 and i see its subsonic is at 30hz. this doesn't limit your low end at all? like, mac (and others i'm sure), u use this amp eh? for competitions, with LP set to like 40 or 50hz? so its playing like 10 hz freq. range? maybe more cause of slopes, but u also use sharp slopes right? first thought was probably not big problem but thought i'd check it out, see what u guys who are using it say..
Polk MM6501 kick panels, Eclipse cd7200mkll and SW9122 Bomb Box, Cadence A4, A7, CAP5, JL8W3V3
Post edited by cadenceclipse on
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Comments

  • arun1963
    arun1963 Posts: 1,797
    edited October 2009
    Depending on where you cut off your mids, you only want your sub to play from say 20hz to that point. So if you cut off your mids at say 50hz then you want your sub to play from 20-50hz. Forget the sub sonic and let the frequencies below 20hz roll off naturally.

    If you want good imaging and staging, you will want your sub bass presentation from the front, The bass hits should come from the centre top of your dash, maybe a bit higher. If your sub plays anything higher than 70-80hz the sub gets located at the rear. So cutting the sub at 50hz on say a 36db slope mens that it would play 1 octave up ie 100hz at 36db lower than 50, hence you would not hear 100 from the sub but from your mid.
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  • cadenceclipse
    cadenceclipse Posts: 459
    edited October 2009
    u missed it man. pa1200.1 thinking about buying it but i saw it has subsonic fixed at 30hz with 24db slope. of course slope is no prob. my concern is freq.. 30hz. can this be disabled? that what ur getting at? thanx
    Polk MM6501 kick panels, Eclipse cd7200mkll and SW9122 Bomb Box, Cadence A4, A7, CAP5, JL8W3V3
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  • arun1963
    arun1963 Posts: 1,797
    edited October 2009
    there is a switch for subsonic off/on. keep it off.
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  • cadenceclipse
    cadenceclipse Posts: 459
    edited October 2009
    u da man arun!

    now for arun or anybody else.. .. guess u get what u get.. Peace!
    Polk MM6501 kick panels, Eclipse cd7200mkll and SW9122 Bomb Box, Cadence A4, A7, CAP5, JL8W3V3
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  • MacLeod
    MacLeod Posts: 14,358
    edited October 2009
    Yes, keep the subsonic filter off. The sub 30 Hz range is what gives you the rumbling feeling. Most music doesnt have much information below 30 Hz but if you listen to music that does, it wont be the same without it.
    polkaudio sound quality competitor since 2005
    MECA SQ Rookie of the Year 06 ~ MECA State Champ 06,07,08,11 ~ MECA World Finals 2nd place 06,07,08,09
    08 Car Audio Nationals 1st ~ 07 N Georgia Nationals 1st ~ 06 Carl Casper Nationals 1st ~ USACi 05 Southeast AutumnFest 1st

    polkaudio SR6500 --- polkaudio MM1040 x2 -- Pioneer P99 -- Rockford Fosgate P1000X5D
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  • tk421
    tk421 Posts: 156
    edited October 2009
    sealed box playing 20hz is a thing to be experienced.

    below 20 and it's rumored that it does strange stuff to women 'down there'.

    just a lil tip: a lot of low bass can reall y mess up stuff in yer car. trunk bolts sometimes run loose. electrical contacts on your dash may give problems. my indicator stick messed up once with all the constant bass. got it fixed tho.
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