what should i set my amp at

Systems
Systems Posts: 14,873
edited May 2004 in Car Subwoofer Talk
i got 1 12inch momo2124 in a sealed box and a profile 800watt 2 channel amp.x-over is 40hz through 500hz and bass boost is 0db to 12 db.what should i set this at to make my sub sound the best???
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  • exalted512
    exalted512 Posts: 10,735
    edited May 2004
    http://www.acaraudio.com/product_info.php?manufacturers_id=46&products_id=1139
    get sounddomain to match the price
    -Cody
    Music is like candy, you have to get rid of the rappers to enjoy it
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  • Systems
    Systems Posts: 14,873
    edited May 2004
    i alreaddy have a amp i need to know what to set my x-over,bassboost and level on
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  • exalted512
    exalted512 Posts: 10,735
    edited May 2004
    low pass it at 80
    set bass boost at 0
    -Cody
    Music is like candy, you have to get rid of the rappers to enjoy it
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  • Systems
    Systems Posts: 14,873
    edited May 2004
    what about the level?
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  • exalted512
    exalted512 Posts: 10,735
    edited May 2004
    level?
    level of what?:confused:
    -Cody
    Music is like candy, you have to get rid of the rappers to enjoy it
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  • Systems
    Systems Posts: 14,873
    edited May 2004
    the gain?on my amp its called the level
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  • exalted512
    exalted512 Posts: 10,735
    edited May 2004
    heres the way i do it even though its not the most correct way ever...
    i turned the gain all the way down
    i turned my radio up to 35(it goes to 40)
    then i just turned it up until it distorted, then let off a little bit and voila
    -Cody
    Music is like candy, you have to get rid of the rappers to enjoy it
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  • neomagus00
    neomagus00 Posts: 3,899
    edited May 2004
    i think that's the most common and easiest way to do it. if you have access to an oscilliscope you can hook that up to the amp, turn the level all the way down, turn the hu to like 4/5 volume (which will become your new maximum), then turn up the level till the o-scope clips, then back it off a bit. does the same thing as the easy way, but with a visual aid.

    xover - between 60 and 100 Hz, depending on how low your front speakers go and your application. the lower the xover, the more load it is on the fronts, but the stage stays more forward and the subs sound better.

    boost - i'm gonna guess that it's 0-12 dB at 40 Hz (it should tell you where it's centered). same as xover, you should sit in the car and make adjustments until it sounds right. the boost should add to the very bottom end of the sub's output, it shouldn't be used to make the whole sub-bass end louder. if you need to do that, you turn the gain of the other amps down. this is because your sub amp is already at it's maximum level, and you don't want to clip it. ever. if you're missing real low bass, you can dial in some boost, but i'd keep it to 6dB or lower.
    It's not good, very fundamentally simply not good. - geolemon

    "Its not good enough until we have real-time fearmongering. I want my fear mongered as it happens." - Shizelbs
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  • Systems
    Systems Posts: 14,873
    edited May 2004
    if i turned to gain all the way down and turn the radio up that loud wouldent it screw your front and rear speakers up?
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  • neomagus00
    neomagus00 Posts: 3,899
    edited May 2004
    no, that's the reason you keep the gain all the way down. go here: http://clubpolk.polkaudio.com/forum/showthread.php?threadid=17905
    It's not good, very fundamentally simply not good. - geolemon

    "Its not good enough until we have real-time fearmongering. I want my fear mongered as it happens." - Shizelbs
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  • exalted512
    exalted512 Posts: 10,735
    edited May 2004
    well i have the advantage of having all my speakers amped
    but if you dont, just disconnect them when you do it
    -Cody
    Music is like candy, you have to get rid of the rappers to enjoy it
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  • Systems
    Systems Posts: 14,873
    edited May 2004
    ok iv only got 1 amp and thats powerin the sub and the 6/9 and 4 inch speakers are running off the cd player so if i turned my amp all the way down and cranked it it would make my 6/9 and 4's disort right?and i wouldent hear the sub right??so i should just turn it up to my listin level and adjust the amp and cd player till the sub sounds good right???
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  • Systems
    Systems Posts: 14,873
    edited May 2004
    oh and if i dissconnet my speakers there wont be any sound comin out of them so whats the point couse i wanna hear the music and bass not just bass
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  • exalted512
    exalted512 Posts: 10,735
    edited May 2004
    ok, lets try this again but a little different
    what volume do your speakers start to distort at?
    (when you test them, DISCONNECT your sub amp)
    lets say they start distorting at 30
    ok
    disconnect all your speakers
    connect your amp up
    turn your volume to 30(or whatever they distort at)
    now turn the gain up as much as you can get it before the sub starts distorting
    now that you have your gain set, reconnect your other speakers and voila
    youre done
    -Cody
    Music is like candy, you have to get rid of the rappers to enjoy it
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  • Systems
    Systems Posts: 14,873
    edited May 2004
    about volume 16 or 17.but cant try it now couse my freakin voice coil is screwed so now i gotta send the danm thing back. :|
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  • exalted512
    exalted512 Posts: 10,735
    edited May 2004
    your speakers distort at 16 or 17!?!
    are they stock?
    do you have a stock radio?
    what does the dial go to on the radio?
    -Cody
    Music is like candy, you have to get rid of the rappers to enjoy it
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  • neomagus00
    neomagus00 Posts: 3,899
    edited May 2004
    my stock speakers distorted w/ my new hu at like 20-22 out of 35, so that's not too incredible
    It's not good, very fundamentally simply not good. - geolemon

    "Its not good enough until we have real-time fearmongering. I want my fear mongered as it happens." - Shizelbs
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  • Systems
    Systems Posts: 14,873
    edited May 2004
    not i got polk momo 6/9 and kenwood speakers but i got a alpine cd player and at volume 16 it playes louder than my buddys pioneer at like 25 or 30.
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  • Systems
    Systems Posts: 14,873
    edited May 2004
    it has this thing were you can set dept on or off and when its on you can turn it to over 20 but i usly have it on ill mess with it tonight and get it so i can turn it up loud but i gotta make sure i break my sub in good this time so i dont have to send it back agan
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  • neomagus00
    neomagus00 Posts: 3,899
    edited May 2004
    well... 'plays louder' doesn't mean 'distorts'... are you sure you're hearing distortion?

    oh, and if you're testing your cabin speakers for distortion, unhook your sub. and what's "dept"? department?
    It's not good, very fundamentally simply not good. - geolemon

    "Its not good enough until we have real-time fearmongering. I want my fear mongered as it happens." - Shizelbs
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  • neomagus00
    neomagus00 Posts: 3,899
    edited May 2004
    p.s. when you're testing for distortion, turn off signal processing - that is, any eq, loudness circuits, bass boost (if for some reason you've got this on your fronts) etc.

    p.p.s. make sure you have a highpass on your fronts...

    holy shiite muslim, i just double-posted...
    It's not good, very fundamentally simply not good. - geolemon

    "Its not good enough until we have real-time fearmongering. I want my fear mongered as it happens." - Shizelbs
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  • Systems
    Systems Posts: 14,873
    edited May 2004
    ya i turned my mx off and dept on and i can turn it up to 28 without dissortion and its loud so loud my buddy that has 3 10inch jl audio w3.lol said he could hit like 160 db and he got in and i unmutted it and h coverd his ears and turned it down.but i got some **** subs in right now and i cant turn it up over 24 and they dissort.can wait to ge my momo back and broke in should be real nice..thx guys
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  • exalted512
    exalted512 Posts: 10,735
    edited May 2004
    if he can hit 160Dbs he should be competing
    hed be winning a lot of money
    -Cody
    Music is like candy, you have to get rid of the rappers to enjoy it
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  • Systems
    Systems Posts: 14,873
    edited May 2004
    i know hes not couse i had 3 10 inch polk gnx subs and they were louder than his
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  • exalted512
    exalted512 Posts: 10,735
    edited May 2004
    GNXs louder than W3s?
    thats pretty good...
    youre doing something right or hes doing something wrong...or a little bit of both
    -Cody
    Music is like candy, you have to get rid of the rappers to enjoy it
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  • Systems
    Systems Posts: 14,873
    edited May 2004
    he dont have his stuff set right anyway.his amp keeps shuttin off so hes got somthin screwed up
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  • exalted512
    exalted512 Posts: 10,735
    edited May 2004
    the amp probably isnt 1 ohm stable and hes probably got them wired at 1.333 ohms
    thus the protection circuitry keeps kicking in
    -Cody
    Music is like candy, you have to get rid of the rappers to enjoy it
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