8 ohm help

mirra540ryder
mirra540ryder Posts: 136
edited August 2007 in Car Subwoofer Talk
well i got a home stereo that puts out 120 watts@8ohm it gose into a 5 unit speaker unit. im running one of my momo 15's and it pounds almost as hard as my 4ohm 1000watt profile amp 310rms. is there somthing wrong with my amp or is my other sub getting more power than im thinking. i got it of ebay:confused:
Post edited by mirra540ryder on
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  • phuz
    phuz Posts: 2,372
    edited August 2007
    It doesn't take much to make a sub "pound"

    Your profile amp probably provides better control, speed, etc. and overall better sound quality.
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  • MacLeod
    MacLeod Posts: 14,358
    edited August 2007
    Im not sure I understand what youre talking about.

    What is a 5 unit speaker unit?

    What is a 4 ohm 1000 watts Profile 300 RMS?

    Are you running a Momo sub in your home?
    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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  • mirra540ryder
    mirra540ryder Posts: 136
    edited August 2007
    yea its like a big box with 2 tweeters a horn and a mid and then the sub. i took the normal sub out and put my momo in it. the 120@8ohms go into a splitter than into 5 speakers

    my profile amp is powering my subwoofer in the car at about 310 rms.
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  • dudeinaroom
    dudeinaroom Posts: 3,609
    edited August 2007
    could be many things wrong. Could be the box in your car is built for a flatter frequency response, and the box in the house is smaller than optimal giving you up a 4db gain around a certain frequency, and if you have it in a corner you could get up to another 3db gain, The amp that you are using in the house could be putting out an additional 10-60? more watts into 4ohms, but this is all in theory.:eek: if you do the math it could be louder in your house than in your car. You also have to look at the car, because of placement you could have cancellation from back waves, and/or compression( subs pressurize the cabin and have to fight themselves to make sound ). hey but what do I know, I'm just a dumb kid.

    Later,
    dude
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  • MacLeod
    MacLeod Posts: 14,358
    edited August 2007
    It also depends on where your sub is mounted in your car. Put it up to the front of the trunk firing into the cabin and youll get a lot of cancellation.
    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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