what kind of db's should i expect?

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gman91

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Joined: July 21, 2010

Location: Washington, United States

Posted: July 21, 2010 at 2:01 PM / IP Logged

I have two eclipse 87121.8 12 " subwoofers, ( 300w RMS 600w peak ), running off of a rockford fosgate Prime R500-1 amp ( 320w x 1 @ 4 ohms ). Im thinking about getting them metered, what can i expect from them in a nice home build box designed for the subs?

roadshop570

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Joined: August 25, 2009

Location: South Carolina, United States

Posted: July 21, 2010 at 6:41 PM / IP Logged

Nowhere near what you want, lol, what vehicle and location its in? Type of enclosure, sealed or vented?

Chadillac

gman91

Member - Posts: 9

Joined: July 21, 2010

Location: Washington, United States

Posted: July 21, 2010 at 7:56 PM / IP Logged

I would be happy with a 125, they are in a saturn SL 97 and a slot ported box.

roadshop570

Copper - Posts: 128

Joined: August 25, 2009

Location: South Carolina, United States

Posted: July 21, 2010 at 8:58 PM / IP Logged

Upgrade your big three, depending on your head unit you may want to add a line driver, but it will get you to your mark.

Chadillac

gman91

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Joined: July 21, 2010

Location: Washington, United States

Posted: July 21, 2010 at 9:37 PM / IP Logged

I got an alpine CDE-100 HU, wth is a line driver? And Big 3 will be soon, but will it really be that much of a difference?

roadshop570

Copper - Posts: 128

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Location: South Carolina, United States

Posted: July 21, 2010 at 11:05 PM / IP Logged

Alpine deck is great, always remember every little bit helps, it should sound good.

Chadillac

DYohn

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Posted: July 22, 2010 at 1:00 PM / IP Logged

I was going to post that the OP could realistically expect SPL greater than 75db, but I didn't want to sound patronizing. The answer is impossible to tell you since it is a function of the enclosure and the installation as much as it's a function of the woofers and the amp. Build it, install it, then test it and report back what you have.

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DYohn

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Posted: July 22, 2010 at 1:01 PM / IP Logged

gman91 wrote:

I got an alpine CDE-100 HU, wth is a line driver? And Big 3 will be soon, but will it really be that much of a difference?

IMO don't waste your money on a line driver, and upgrading the Big 3 never hurts even though your amplifier is quite small and a standard electrical system should be able to handle it.

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gman91

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Joined: July 21, 2010

Location: Washington, United States

Posted: July 22, 2010 at 4:31 PM / IP Logged

I got it hooked up, my windshield wipers and windshield flex quite a bit.

DYohn

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Posted: July 22, 2010 at 5:20 PM / IP Logged

Uh huh...

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