db level

what is a DECENT amount of db's to be runnin?

depends on how long you are listening to it, also are you really going to measure your dbs? well 100 and below would be my safe area.

decent for what?
decent for competition? decent for listening to for hours at a time? decent for having no subs? decent for having 8 15's?

for having 2 12's

with 2 good 12's...maybe 150db?
with 2 average 12's maybe 140 or so


someone correct me if I'm off

800 watts of 2 15"s how much there?

i wouldnt say 140DB with 2 12" subs. yes there loud but not that loud in most cases. if you know decibles then youd know that every 3 DB doubles the amount of sound output. most subs generate about 100DB high power ones of course increase this number. at most id say a 12" sub can generate 120db so two of these should put you at 123DB add in a bunch of 96DB speekers and your talking in the neighborhood of 126DB

didn't read everything but i was able to knock around 145db on the old termpro mic.

in SPL, install is basically everything.

didn't read everything but i was able to knock around 145db on the old termpro mic.

in SPL, install is basically everything.
when you say install is everything, what all do you have to have for it to be right?

i wouldnt say 140DB with 2 12" subs. yes there loud but not that loud in most cases. if you know decibles then youd know that every 3 DB doubles the amount of sound output. most subs generate about 100DB high power ones of course increase this number. at most id say a 12" sub can generate 120db so two of these should put you at 123DB add in a bunch of 96DB speekers and your talking in the neighborhood of 126DB

I've heard of people who hit 140's with a single sub, hence my guess

and with db, 3db requires double the power, and 10db sounds twice as loud to the human ear
http://hyperphysics.phy-astr.gsu.edu/hbase/ph4060/p406i.html

humm thats a bit more than i knew about DB. anyways im not saying its not possible with the correct configuration it is definatly possible to reach 140DB with a single sub. your talking sick output in a bandpass setup and some powerfull speekers to back itup.

As that guy above said,

INSTALL IS EVERYTHING....

I've seen two 15's and 2000wrms only hit 130 odd dB...


Yet I managed to pull 148.3dB out of a single 12" AUS$200 sub...

i wouldnt say 140DB with 2 12" subs. yes there loud but not that loud in most cases. if you know decibles then youd know that every 3 DB doubles the amount of sound output. most subs generate about 100DB high power ones of course increase this number. at most id say a 12" sub can generate 120db so two of these should put you at 123DB add in a bunch of 96DB speekers and your talking in the neighborhood of 126DB

huhhh ?

each doubling of power produces +3dB of sound output
to double the sound output, it requires 10 times the power

if you aren't sure, look at the formula for dB's 10*log(power1/power2)
everyone has a calculator on their computer, try running some numbers on the equation to see this is true. Notice that if you use the large number on the bottom, the answer comes up negative.

huhhh ?

each doubling of power produces +3dB of sound output
to double the sound output, it requires 10 times the power

if you aren't sure, look at the formula for dB's 10*log(power1/power2)
everyone has a calculator on their computer, try running some numbers on the equation to see this is true. Notice that if you use the large number on the bottom, the answer comes up negative.
Hate to be ignorant since I only got into this last year, but what is the (power1/power2)? what are the powers?

my guess is that power 1 is the Intensity level (any level) divided by power 2 (the reference intensity).

if that is true then take then the equation would be

db=10*log(I/1.0x10^-12 W/m^2)

just find out the "I" and u can plug in that particular equation. "I" is defined as Power divided by Area. which makes sense of course since intensity is the units of watts per square meter.

EDIT-btw..1.0x10^-12 W/m^2 is the threshold of normal acute hearing.

no ... power 1 is the power of one of the amps, power 2 is power of the other amp.

O_O

blah. oh well..i probably thought of a different application.

Could someone just tell me how 1600 watts in 2 15"subs would rate on the SPL level?

there are WWAAAYYY too many variables to really even guess - but if it isn't hitting at least 140, I think you need to do some rethinking

I hit 144 with 2 10s, I've seen 150s with one 12. Install and power plays a big role. Also, don't listen to 140 dbs on a regular basis. It hurts your hearing, believe me.