MC Kustoms
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Registered: 6th Aug 02
Location: Luton
User status: Offline
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i have a 15" 2000w max 1000w rms sub its running off a 1000w rms amp
when it hits the realy low Hrz (30-20) it seems to sound like its flaping
anyone got an idea
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CORS4
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Registered: 2nd Dec 00
Location: West yorkshire
User status: Offline
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could be vibration from the car it self.
sound proof your car to get the best from your sub.
at the moment you could be losing out on a few dbs
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Richie
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Registered: 3rd Dec 02
Location: Newport, Wales
User status: Offline
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what sub is it? u made sure it can go low enough?
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MC Kustoms
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Registered: 6th Aug 02
Location: Luton
User status: Offline
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its a rockford fossgate rfr 3115 it can go as low as 20hrz its not the car if i open the boot and look at it the sub is moving a lot but there ant much bass
if u blow a raspberry it sounds like that
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TOMAS
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Registered: 7th Aug 02
Location: Nottinghamshire
User status: Offline
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You got it in the right box? Most sealed subs can go down to 20Hz but a LOT tend to struggle as this is the lowest of bass notes. My 15" type R used to flap arpound 20Hz, i never really found out what caused it but I think i had too much power to it.
To be honest i wouldnt be bothed about a sub playing down to 20Hz as that note is kind of useless, maybe 40-30Hz is low enough? Eq it down a bit at 20Hz and see if that helps?
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CopyWrite
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Registered: 16th Apr 02
Location: South Walez
User status: Offline
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your ears cant hear below 20 hz so um...what's the problem?
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corb
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Registered: 24th Apr 02
Location: Calgary, Alberta, Canada
User status: Offline
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it will look like its flapping cos 20Hz is such a low frequency that the subs moves slowly to produce the note.
20Hz = 20 cycles per second, so not as quick as say, 60 Hz, which is 60 cycles per second.
As for it sounding poo, it will, unless you use some genious(sp) engineered enclosure.
Rockford's demo pick up truck can go as low as 10Hz, something to do with the fact the the opening for the face of the enclosure is smaller in surface area than the total surface area of all the subs put together.
I'll see if i can find a pic of it somewhere.
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MC Kustoms
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Registered: 6th Aug 02
Location: Luton
User status: Offline
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thanx m8
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corb
Member
Registered: 24th Apr 02
Location: Calgary, Alberta, Canada
User status: Offline
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get a subsonic filter on there there, taking out all frequencies below 28Hz.
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