Lets say I determine my MMD tweeters are bit too bright for my taste. Since my head unit allows me to adjust the Q in 7 frequency ranges would a low Q setting at a given freq. range mellow out the sound or would a high Q setting do that?. By low setting, I mean a low Q value from a wider freq. curve. I read the tutorial and understand how to calculate Q when the sine wave is shown on a graph but couldnt find what effect low or high Q has on how sound is heard/perceived.
My dyslexic intuition tells me the wider curve which produces the lowest Q value may soften the brighteness but that is just a W A guess.
In each of the 7 bands I can choose between 3 frequencies per band range and then choose between 3 Q settings for the freq. selected.Pretty cool if I only really knew what to shoot for when pushing buttons like a monkey trying to hit the button that dispenses bananas.
Also, where in the frequency do I need to address tweeter concerns...? The highest range? band 6 and 7? 5, 6 and 7?I make changes and then listen but really need some guidelines and direction.
The owners manual only tells one how things are done, not the actual effect.
I have not purchased a microphone yet to allow the unit to record its own data from your preferred position in the truck. Once you do that you upload that info to the Eclipse web site and it corrects different parameters which I can then upload into the head unit.Im hoping that once that is done, I can look at the EQ settings on the unit.
What about crossover settings on the head unit...Say I set the low pass filter at 80Hz and set the slope at 24db/octave.Will this override the crossover settings on the amp. Say, for instance my sub amp LP is set at 80Hz and it is 12db/oct, is the roll off rate cumultive...= 24+12 db/oct?
What if the amps crossover freq doesnt match the crossover freq I set on the head unit?
Im trying to research before asking all these questions...just havent come up with all the answers yet. Thanks
Replies (3)
swez on 03/7/2007 14:51:44
Whoa... slow down Haws... that's a lot of detail here to cover.
Yes, a wider "Q" tends to be smoother and less harsh on the ears. This is true for both mids and tweets. If the standard "Q" settings are a bit too bright or bity, a wider "Q" will help smooth it out.
High end tweeters generally operate at ~ 2.5 KHz and up. Some will take less power at this range, but can be very smooth at the mid/tweet transition stage in the crossover. The Infinity's cross at 3.5 KHz. Cheaper tweeters tend to cross over above 4.0KHz.
RF recommends <2.0" separation or >7.0" separation between tweeters and woofers. Obviously, there is room for experimentation here.
Dave
swez on 03/7/2007 19:45:33
Since your HU has Parametric EQ features, this allows one to zoom in on a narrow or wide band of frequencies. ("Q" width) The calibrated mike should help a lot. As you found out with the sub tweaking, a small adjustment can make a notable difference in the view of a meter, but not as recognizable to the ear.
If you find the front tweeters are just plain honking/screaming at you, then adjusting the PEQ settings above 3.5KHz will be the right tools to use. This is done by attenuating EQ settings in that range and adjusting "Q" to your preferences. (That would be bands 6 & 7.)
As far as the crossover settings to consider, the HU has a very good option w/ the -24dB slope option. (That's a 4th order crossover network) If you also use the amp crossovers, this is additive to what the HU is doing and now we have a -36dB slope. This is good for getting the lows out of the mid/high speakers, but not required on the sub. A -12dB slope is nice and gradual.
Again, some experimentation is in order here. Steep slopes are great for protecting low powered speakers from bass, but can leave gaps at the crossover points and we get drop outs in SPL at the crossing points. A slight overlap between HPF/LPF features can fill that void, but the only real way to detect it, is using an Real Time Analizer, (RTA) and a calibrated mike w/ sweep tones or a pink noise generator tone.
Swez
jamesp on 03/7/2007 22:09:46
Thanks Swez. Now I know where to tweak if necwssary.
On the RF comps, they actually come with an adapter to mount 1 or both tweets in the center of the woofer. Ill stick em around in different places on the door panel with a little servo tape and see if I can find sweet spots. If not, Ill just do the easy deal and mount them in the woofer.
My dyslexic intuition tells me the wider curve which produces the lowest Q value may soften the brighteness but that is just a W A guess.
In each of the 7 bands I can choose between 3 frequencies per band range and then choose between 3 Q settings for the freq. selected.Pretty cool if I only really knew what to shoot for when pushing buttons like a monkey trying to hit the button that dispenses bananas.
Also, where in the frequency do I need to address tweeter concerns...? The highest range? band 6 and 7? 5, 6 and 7?I make changes and then listen but really need some guidelines and direction.
The owners manual only tells one how things are done, not the actual effect.
I have not purchased a microphone yet to allow the unit to record its own data from your preferred position in the truck. Once you do that you upload that info to the Eclipse web site and it corrects different parameters which I can then upload into the head unit.Im hoping that once that is done, I can look at the EQ settings on the unit.
What about crossover settings on the head unit...Say I set the low pass filter at 80Hz and set the slope at 24db/octave.Will this override the crossover settings on the amp. Say, for instance my sub amp LP is set at 80Hz and it is 12db/oct, is the roll off rate cumultive...= 24+12 db/oct?
What if the amps crossover freq doesnt match the crossover freq I set on the head unit?
Im trying to research before asking all these questions...just havent come up with all the answers yet. Thanks
Replies (3)
swez on 03/7/2007 14:51:44
Whoa... slow down Haws... that's a lot of detail here to cover.
Yes, a wider "Q" tends to be smoother and less harsh on the ears. This is true for both mids and tweets. If the standard "Q" settings are a bit too bright or bity, a wider "Q" will help smooth it out.
High end tweeters generally operate at ~ 2.5 KHz and up. Some will take less power at this range, but can be very smooth at the mid/tweet transition stage in the crossover. The Infinity's cross at 3.5 KHz. Cheaper tweeters tend to cross over above 4.0KHz.
RF recommends <2.0" separation or >7.0" separation between tweeters and woofers. Obviously, there is room for experimentation here.
Dave
swez on 03/7/2007 19:45:33
Since your HU has Parametric EQ features, this allows one to zoom in on a narrow or wide band of frequencies. ("Q" width) The calibrated mike should help a lot. As you found out with the sub tweaking, a small adjustment can make a notable difference in the view of a meter, but not as recognizable to the ear.
If you find the front tweeters are just plain honking/screaming at you, then adjusting the PEQ settings above 3.5KHz will be the right tools to use. This is done by attenuating EQ settings in that range and adjusting "Q" to your preferences. (That would be bands 6 & 7.)
As far as the crossover settings to consider, the HU has a very good option w/ the -24dB slope option. (That's a 4th order crossover network) If you also use the amp crossovers, this is additive to what the HU is doing and now we have a -36dB slope. This is good for getting the lows out of the mid/high speakers, but not required on the sub. A -12dB slope is nice and gradual.
Again, some experimentation is in order here. Steep slopes are great for protecting low powered speakers from bass, but can leave gaps at the crossover points and we get drop outs in SPL at the crossing points. A slight overlap between HPF/LPF features can fill that void, but the only real way to detect it, is using an Real Time Analizer, (RTA) and a calibrated mike w/ sweep tones or a pink noise generator tone.
Swez
jamesp on 03/7/2007 22:09:46
Thanks Swez. Now I know where to tweak if necwssary.
On the RF comps, they actually come with an adapter to mount 1 or both tweets in the center of the woofer. Ill stick em around in different places on the door panel with a little servo tape and see if I can find sweet spots. If not, Ill just do the easy deal and mount them in the woofer.
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