dB estimate

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eargasm

Member - Posts: 48

Joined: November 16, 2003

Location: Australia

Posted: February 04, 2004 at 3:20 AM / IP Logged

yeah, Forbidden has it the way i was taught by the experts.

87db (or whatever your particular subs ratings say) is its output with 1watt input.

Julian, ya gotta understand, double the power = +3dB.

double the input power is 2watts, giving us 90dB. Double again is its expected dB at 4watts input, etc.

1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024 watts RMS.

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jeffchilcott

Platinum - Posts: 2,483

Joined: April 11, 2002

Location: United States

Posted: February 04, 2004 at 3:12 PM / IP Logged

right on, like i said about 121...have installed the setup in a cougar and it should be close

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walty220

Copper - Posts: 75

Joined: January 15, 2004

Location: United States

Posted: February 04, 2004 at 4:35 PM / IP Logged

outta curiosity, at 121 dB.. am i going to be heard from a block away??

forbidden

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Joined: November 01, 2003

Location: Alberta, Canada

Posted: February 04, 2004 at 4:50 PM / IP Logged

If the person has bionic hearing, or there is no other noise on the block. It will sound good but not excessively loud.

Top Secret, I can tell you but then my wife will kill me.

geepherder

Platinum - Posts: 3,668

This member consistently provides reliable information

Joined: October 27, 2003

Posted: February 04, 2004 at 7:22 PM / IP Logged

Only if you keep the windows rolled down, and in this cold, I wouldn't think it wise (you might catch a cold) dB estimate - Page 3 -- posted image. . No but seriously, you do turn it down when you enter a neighborhood or pull up to a light, right? In a properly dampened car with the windows rolled up, even with the system up a good rate, it's noticable outside the vehicle, but not very loud.

My ex once told me I have a perfect face for radio.

walty220

Copper - Posts: 75

Joined: January 15, 2004

Location: United States

Posted: February 04, 2004 at 7:45 PM / IP Logged

most small neighborhoods yes..well ATT, i love att. I just want to be heard coming, enough to turn a head,if this set up is incapable... then im sorry for puttin you in the position to break it to me lol, dont feel bad, im learnin, its not gonna hurt my ego.

Paradigm

Silver - Posts: 284

Joined: November 25, 2003

Location: United States

Posted: February 05, 2004 at 8:10 AM / IP Logged

Don't let it hurt your ego if they DON'T turn their heads when you go by, either. Some people will just ignore it because they think it's ridiculous to have something that loud (which in a way is true, if you think about it).

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themissinglink

Member - Posts: 1

Joined: February 05, 2004

Location: Canada

Posted: February 05, 2004 at 1:17 PM / IP Logged

I found this in the manual of a JL Audio woofer:

** Efficiency is NOT an accurate indicator of a subwoofer's output capability and should not be used as a comparison to other subwoofers to determine which one is "louder."

Which would imply that SPL is not dependent on the Efficiency of the speaker, but how much power can be put through the speaker.

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geepherder

Platinum - Posts: 3,668

Joined: October 27, 2003

Posted: February 05, 2004 at 3:29 PM / IP Logged

The efficiency rating (a percentage) is not to be confused with the sensitivity rating.

My ex once told me I have a perfect face for radio.

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dB estimate

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