Recent content by user44455555

Hi in short: individual max boost react as a boost threshold and overall max boost is max amount of boost a dipin db if individual max boost is lower as a dip db then it do nothing. with individual boost 5 db the 68 hz dip and others at higher frequency is not boost and no filter is create at...

Hi I notice that it is possible when "Export a measure as txt" that i can load it as a room curve for the EQ to EQ that it correct to other speaker measure FR . Only the Target Level (db SPL) work setting diffrent. if my measure is around 67 db and i have target level set to 60 db in EQ the...

I also test diffrent windowing on loopback(no speaker only DSP) with a 30.7 hz 12 db Highpass with a 100 hz generator sine. No windowing(rectangle) shift 1. cycle to 102 hz which look precise and it have fast looking rise time. tuckey 0.25 shift frequency of 1. cycle to 115 hz . so i think...

I did not know how i can set a correct LF slope because, when i set it to 36 db per octave at 36 hz(speaker measure) the overall LF slope is in the range the SNR is good, more than the measured slope down, and only in the range the SNR is worse ok. maybe the LF tail can only use when signal is...

I find something strange in excess group delay A HP 12 db show near 0 excess group delay. but in compare to measure with a DSP HP12 BW EQ in measure the excess group delay double.see screenshot. group delay stay near same I measure from 0 hz the 45 HZ group delay and excess group delay. you...

Headphones work excellent with that stimulus. see screenshots and when you look at a acoustic kickdrum wave it is simular as this burst in bass. the attack click is played by the tweeter or mid range and tweeter (in 3 way systems) because is higher as 3 khz. kickdrum have a 2 cycle freq between...

thanks for your answer, please look also at my osciloscope screenshots what crazy stuff speakers do. this explain alot, wy group delay is negativ when the SPL of the begin of measure is 35 hz. the first 2 cycles are much faster as 50 hz in transient. can see clear in screenshot at 50 hz does...

thats really strange wy excess group delay output wrong values when start measure at 35 hz and measure have good SNR. Seem i need verify if group delay code work correct with burst measure and osciloscope to see if group delay show same diffrence as osciloscope measure with a burst at 35 hz and...

I notice that for correct excess group delay the begin of measure frequency (and end) need have a good SNR . so currently it is important to not use just 20-20 khz measure range. I notice at 35 hz is a good start point for the 5 inch speakers and larger And question is, is it possible to limit...

here is the confirm excess group delay change only very few with diffrent highpass frequency (to simulate bass lost) .And the most important thing, a big speaker with more bass should get less excess group delay than a small speaker. But my measures show the big speakers have more Excess group...

But the frequency response of 1 speaker is same only it play at diffrent levels L1 L2 L3 and get diffrent excess group delay over 1 ms (1000 µsec) diffrence. how can you explain this ?. you can download the mdat and choose spl align to see the FR of L1 L2 L3 levels measure EDIT: i remove that...

Hello I do ramped levels at nearfield with following method. make microphone distance 5 cm to Woofer. set volume of each Speaker you want test with REW check Levels in measure tab sp that Level - 6 have 95 db . this is at 1 meter 69 db, and Level 3(L3) so it is not so loud but loud enough to...

the group delay is also frequency dependent and there is no excess group delay or predicted group delay. you can see the groupdelay slightly change when i FR the JBL to the kali, but still much better group delay on JBL. the mdat i have upload too

thanks to your help and hint with try out filters now i understand what excess phase and predicted phase is, because when i EQ the JBL it have same excess phase as the non EQ version . only kali have very diffrent excess phase So i assume min phase is the result the frequency response of the...

you mean i should simulate with EQ the bass range of kali and compare phase then ?. this i have done with REW EQ. The Jbl 104 get FR in the Bass part as the Kali. you can see the jbl SPL change alot but the phase only slightly to the original JBL 104. the huge diffrence in phase to the kali...