What Active Crossover

[xplicitACTS 10+ year member]

I have a couple of nice active xovers in my forsale thread.

http://www.caraudio.com/forum/showthread.php?t=235483

 

[DejaWiz 5,000+ posts]

because the frequency doesn't get cut at 63 or 80, but it just slopes down. So ur not losing any frequency in between because it will be played...by both speakers, i believe.
God i hope that makes sense

Yes, I know it slopes, but why have the slope start well before it should? At -18dB/Oct slope for both the sub and mid channels, why do this....

Sub:

63Hz = 0dB

80Hz = -11dB

126Hz = -18dB

252Hz = -36dB

Mid:

80Hz = 0dB

40Hz = -18dB

20Hz = -36dB

When you can do this.....

Sub:

80Hz = 0dB

160Hz = -18dB

320Hz = -36dB

Mid:

80Hz = 0dB

40Hz = -18dB

20Hz = -36dB

It's not going to be that exact since the slope starts a little before the set frequency, but I hope you get the picture.

Set the sub LP to 80Hz and the BP-HP to 80Hz.

That will (roughly) make it so there is only about -3dB at about 80Hz instead of -6dB at about 70Hz.

 

[michaelsil1 10+ year member]

Why the frequency gap?

I started with the Sub @ 80 Hz the Mid Bass and Sub Bass didn’t blend that well. I also tried @ 63 12db, where it's set now the Sub Bass and Mid Bass blend very well. I had to play for awhile for everything to meld.

 

[DejaWiz 5,000+ posts]

I started with the Sub @ 80 Hz the Mid Bass and Sub Bass didn’t blend that well. I also tried @ 63 12db, where it's set now the Sub Bass and Mid Bass blend very well. I had to play for awhile for everything to meld.

If it's set to where it's music to your ears, then right on. I suppose you can ignore my previous post then LOL.

 

[michaelsil1 10+ year member]

If it's set to where it's music to your ears, then right on. I suppose you can ignore my previous post then LOL.

//content.invisioncic.com/y282845/emoticons/eek.gif.771b7a90cf45cabdc554ff1121c21c4a.gif I have it set @ 63Hz 12db.//content.invisioncic.com/y282845/emoticons/eek.gif.771b7a90cf45cabdc554ff1121c21c4a.gif

 

[DejaWiz 5,000+ posts]

//content.invisioncic.com/y282845/emoticons/eek.gif.771b7a90cf45cabdc554ff1121c21c4a.gif I have it set @ 63Hz 12db.//content.invisioncic.com/y282845/emoticons/eek.gif.771b7a90cf45cabdc554ff1121c21c4a.gif

Yes, but in your previous post you stated 18dB/Oct across the board. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

Even with a -12dB/Oct slope on the sub channel, the difference between a 63Hz setting vs an 80Hz setting is going to be about -3dB at 80Hz for the sub. No big deal, more of an FYI than anything else.

 

[michaelsil1 10+ year member]

Yes, but in your previous post you stated 18dB/Oct across the board. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif
//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif I made a Boo Boo!//content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

Even with a -12dB/Oct slope on the sub channel, the difference between a 63Hz setting vs an 80Hz setting is going to be about -3dB at 80Hz for the sub. No big deal, more of an FYI than anything else.

I do have a concern: the frequency cut off for the 6.5" is 2.5 KHz the Tweeter is also 2.5 KHz. I do have both @ 3.15KHz 18db Slope. Should I be concerned?

 

[DejaWiz 5,000+ posts]

I do have a concern: the frequency cut off for the 6.5" is 2.5 KHz the Tweeter is also 2.5 KHz. I do have both @ 3.15KHz 18db Slope. Should I be concerned?

If you aren't experiencing any roll-off, then I wouldn't be concerned.

 

[michaelsil1 10+ year member]

Yes, but in your previous post you stated 18dB/Oct across the board. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

Even with a -12dB/Oct slope on the sub channel, the difference between a 63Hz setting vs an 80Hz setting is going to be about -3dB at 80Hz for the sub. No big deal, more of an FYI than anything else.

Okay, I changed the Sub to 80Hz 18db and lowered the Level.//content.invisioncic.com/y282845/emoticons/veryhappy.gif.fec4fed33b4a1279cf10bdd45a039dae.gif

It made a difference for the better.

Thanks for the help.//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[DejaWiz 5,000+ posts]

Okay, I changed the Sub to 80Hz 18db and lowered the Level.//content.invisioncic.com/y282845/emoticons/veryhappy.gif.fec4fed33b4a1279cf10bdd45a039dae.gif
It made a difference for the better.

Thanks for the help.//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

Glad to hear it made a positive difference! //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[michaelsil1 10+ year member]

Glad to hear it made a positive difference! //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

I have to also admit there was a lot of operator error.//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

The Amps were out of Sync, Sub Amp was overpowering the main Amp; this became even more of an issue when I went Active. I read your how to set the Gains and ventured into the unknown (no Volt Meter), problem solved.

 

[DejaWiz 5,000+ posts]

I have to also admit there was a lot of operator error.//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif
The Amps were out of Sync, Sub Amp was overpowering the main Amp; this became even more of an issue when I went Active. I read your how to set the Gains and ventured into the unknown (no Volt Meter), problem solved.

Glad to hear that helped, as well. How satisfied are you with your system overall since you've gone active?

 

[MiniVanMan 10+ year member]

Here's a link if you want to get an idea of what a midwoofer experiences in the upper range of it's frequency response. Actually, both the links I'll post might help you understand a bit better what's happening. However, what really matters is what sounds good to you.

http://www.diymobileaudio.com/forum/showthread.php?t=7107

http://www.diymobileaudio.com/forum/showthread.php?t=7160

 

[michaelsil1 10+ year member]

Glad to hear that helped, as well. How satisfied are you with your system overall since you've gone active?

That's a very difficult question for me answer.

I'm glad I went Active it cured some of my main issues, overall I feel the system still lacks in the Midrange. I have very good Mid Bass, very good Sub Bass, so so Mids, okay Highs.

I might be to picky, however I'm on a mission: Great SQ!!:laugh

 

[DejaWiz 5,000+ posts]

That's a very difficult question for me answer.

I'm glad I went Active it cured some of my main issues, overall I feel the system still lacks in the Midrange. I have very good Mid Bass, very good Sub Bass, so so Mids, okay Highs.

I might be to picky, however I'm on a mission: Great SQ!! //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif

One can never be too picky when it comes to getting great SQ. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif