spl installs - Page 7 - Saxperience

Coonper · 27th July 2008, 21:25

Nice one mate! Good scores there, especially considering the cost of it!

Why did it peak so high though? I thought it was tuned to 33hz? But saying that, they often do tend to peak above their tuning...

liam_b · 28th July 2008, 12:30

not sure tbh its tuned to to 35hz think it might of been my sittings on the amp as we did change the settings untill after a cuple of tests

whats a headunit for around £100 thats decent?

Coonper · 28th July 2008, 12:41

For me it would be this one

http://www.caraudiodirect.co.uk/pion...a3efd2cf245f55

Or this one

http://www.caraudiodirect.co.uk/pion...a3efd2cf245f55

The first one only has 1 preout though, which may cause a problem for you. SO the second one might be the better choice

Elliott · 28th July 2008, 13:11

The second one is very good. My brother has it and i think its excellent tbh.

liam_b · 28th July 2008, 17:52

ummm i been looking at the 2nd one does it have high pre-outs?

VTS_86 · 28th July 2008, 18:24

Try here but I would imagine that it will be 4volts ish I suppose.

http://www.pioneer.co.uk/uk/products...0UB/index.html

liam_b · 28th July 2008, 20:22

just read that doesnt say any think about pre-outs o well can someone quote my last post on page three as i cant see it

it should be the one with my db readings thanks

Coonper · 28th July 2008, 20:43

well been at show all day got my car tested went well got front end set up alot better and have been told to get a new headunit as the shity one i have at the moment is ment to be losing me about 4db got sun roof flexin like a bitch too

Total Average ((((Propper Droppers)))) Score =136.6dB

Peak= 141.4dB @ 50Hz
40Hz= 138.3dB
33Hz= 137.5dB
25Hz= 134.5dB
20Hz= 131.6dB

liam_b · 28th July 2008, 20:44

thanks mate

Ashleyp · 28th July 2008, 21:20

Quote:

Originally Posted by Coonper

well been at show all day got my car tested went well got front end set up alot better and have been told to get a new headunit as the shity one i have at the moment is ment to be losing me about 4db got sun roof flexin like a bitch too

Total Average ((((Propper Droppers)))) Score =136.6dB

Peak= 141.4dB @ 50Hz
40Hz= 138.3dB
33Hz= 137.5dB
25Hz= 134.5dB
20Hz= 131.6dB

whats your box tuned to? how come so many quotes of DB's at different HZ? i dont have a clue about spl ratings etc

also, this in the baleno?

Coonper · 28th July 2008, 21:41

Quote:

Originally Posted by Ashleyp

whats your box tuned to? how come so many quotes of DB's at different HZ? i dont have a clue about spl ratings etc

also, this in the baleno?

This isnt my scores, its liams mate. He asked me to quote it for him!

Anyway, to answer you're question...

When we tune our boxes to certain frequencies, this is in theory the frequency that the sound should peak at. Therefore, liams box was tuned to 33hz (iirc) so it should have peaked @ 33hz which is quite low. However, things dont always go to plan and they nearly always peak above their tuning for some strange reason.

If you were to go for pure spl you wold tune the box to around mid 40's, as this is generally where the sub is at its loudest, however, if you planned on using it as a daily driver it wouldnt be very musical and would lose its ability to drop to the real low notes if tuned this high.

I would like to know why they always seem to peak higher than their tuning though...

Ashleyp · 28th July 2008, 21:43

ah fair enough

a little more insight into the world of spl

liam_b · 28th July 2008, 22:39

theres 2 different types of testing proper droopers and db drag

proper droopers tests your system over 4 certain hz (20 25 33 40) then one more that is your peak hz then its all worked out to an average score

db drag you play your peak for 30 seconds and thay see how you loud you can get your system but a problem with this format is you can get some chav with his single 12inc and he can put it in a highly tuned box that will sound shit but get a high db score