dazz25
Member
Registered: 18th Dec 02
Location: Cheshire Drives: Corsa C SXi
User status: Offline
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Hi,
I've just bought a 12" sub and amp and have fitted them in my car.
The only problem is that I don't know how to setup the gain and crossover 
On my amp I have bass boost, should this be on or off?!
Then I have a crossover between 32Hz and 320Hz, what should this be set at?
I know what the gain does but when it's set to low I haven't really got any bass! But when it's high and I stand outside the car all I can hear is a rattling from the back of the boot, the vocals from the front speakers and no bass at all! The bass is fine when i'm inside the car or I lift the boot up!
Sorry about the long post .
Hope you can help!
Cheers 
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dazz25
Member
Registered: 18th Dec 02
Location: Cheshire Drives: Corsa C SXi
User status: Offline
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It's a Corsa C by the way!
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CopyWrite
Member
Registered: 16th Apr 02
Location: South Walez
User status: Offline
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U want the crossover to be closer to 32hz...20hz is the lowest frequency the human ear can listen to.
Or LPF (low Pass Filter)
Use the BassBoost if u want..it might add some DB. (They normally do)
With the Gain..turn the slope all the way to its minimum settin and put on a song with a fairly steady beat....and turn ur Headunit up slowly until it starts to distort slightly...then back off the volume abit until its a clear signal.
Now with the HU still playin do the same with the gain.
As for ur rattling outside the car....get some Dynamat & sound deaden the whole boot...might prove to be expensive & may not solve it. The Number plate maybe a source of the rattling aswell.
but dont worry about the rattling...u dont sit outside ur car when u drive do u!
[Edited on 09-08-2004 by CopyWrite]
[Edited on 09-08-2004 by CopyWrite]
[Edited on 09-08-2004 by CopyWrite]
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Richie
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Registered: 3rd Dec 02
Location: Newport, Wales
User status: Offline
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Best to turn bass boost off. Set the crossover to about 125hz if you like the punchy dance stuff, or to about 80hz if u like your R&B ect.
Turn the gain up a bit under half way and you should be fine, just dont cane it for a bit.
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dazz25
Member
Registered: 18th Dec 02
Location: Cheshire Drives: Corsa C SXi
User status: Offline
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Sorry I forgot to mention that I had a LPF, should this be switched on and then the crossver set?!
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Richie
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Registered: 3rd Dec 02
Location: Newport, Wales
User status: Offline
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Yes you must put the LPF switch on.
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CopyWrite
Member
Registered: 16th Apr 02
Location: South Walez
User status: Offline
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aye...play ur sub at low volume for a while (could be anything from 2 hours to 2 weeks) dependin on the manufactuer
this wil loosen up all the stiff parts which move when the subs playin.
It's known as runnin-in.
I've not done this with my first system and blew the voice coil.
So I'm speakin from experience.
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dazz25
Member
Registered: 18th Dec 02
Location: Cheshire Drives: Corsa C SXi
User status: Offline
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It's a JBL sub.
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CopyWrite
Member
Registered: 16th Apr 02
Location: South Walez
User status: Offline
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yes it will still need runnin-in more than likely.
doin this may save u buyin a new sub...it was actually a JBL sub which was blown when I caned it straight off...mind u this was a good few years back when I didn't know too much.
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dazz25
Member
Registered: 18th Dec 02
Location: Cheshire Drives: Corsa C SXi
User status: Offline
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Cheers for that fellas!
The rattlings still annoying me! I'll give it a go and get back to you!
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dazz25
Member
Registered: 18th Dec 02
Location: Cheshire Drives: Corsa C SXi
User status: Offline
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Sounds abit better now!
Still can't hear any bass outside the car!
I think the rattling is because I have put the wire behind the plastic trim in the back and its vibrating! I'll have to re-route them this weekend.
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CopyWrite
Member
Registered: 16th Apr 02
Location: South Walez
User status: Offline
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all corsa's rattle like fuck outside dont worry.
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dazz25
Member
Registered: 18th Dec 02
Location: Cheshire Drives: Corsa C SXi
User status: Offline
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Yeh but I can't hear anything else!
No bass or anything!
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