Ok i have finallly done a few graphs.
My sub is a DIY job with two peerless 830952 12inch drivers in a 125L sealed enclosure, running a 1000w Dayton amp.which has a built in rumble filter at 18hz...
anyways i was told there might be something wrong with my sound card cal, it took for ages just to get the input out puts setup.
the upper wiggly line is the corrected measurement, with 1:1 smoothing
the solid lhorizontal line is the 75db target
the solid dark line is the spl meter correction
the dotted line is the sound card calibration correction.
sub at 1m set SPL to 75dbamp gain is on 1
As heard in the listening position, gain on amp cranked all the way up to....3!
I have left all the settings at this stage at 0 i played with dropping the db at 20hz down by 10db but it doesnt change that much as it drops the roll off a lot sooner.
I will have another play and see if i can get the sound card cal better, then if its not so jumpy i wont need the 1:1 smoothing on the sub plot, does that sound correct?
My sub is a DIY job with two peerless 830952 12inch drivers in a 125L sealed enclosure, running a 1000w Dayton amp.which has a built in rumble filter at 18hz...
anyways i was told there might be something wrong with my sound card cal, it took for ages just to get the input out puts setup.
the upper wiggly line is the corrected measurement, with 1:1 smoothing
the solid lhorizontal line is the 75db target
the solid dark line is the spl meter correction
the dotted line is the sound card calibration correction.
sub at 1m set SPL to 75dbamp gain is on 1
As heard in the listening position, gain on amp cranked all the way up to....3!
I have left all the settings at this stage at 0 i played with dropping the db at 20hz down by 10db but it doesnt change that much as it drops the roll off a lot sooner.
I will have another play and see if i can get the sound card cal better, then if its not so jumpy i wont need the 1:1 smoothing on the sub plot, does that sound correct?