So I Called Jl...

[goodstuff 10+ year member]

About going active. They told me not to cut the tweeter any lower then 4.8k which means I can't use the coustic xm3 or the memphis xo6..So first off, I'm looking for some other resonably priced brands of active crossovers. They also told me the mids will handle 75 rms and the tweets will handle 25 rms. So am I correct in thinking that it's the crossover that's sort of a weak point in terms of power handling? because they rate them together with the passive crossover at 60 rms. I've got the 6channel e series jl amp...the manual says 150x3 bridged ,can I go with 150x2 to the midbasses and 45 rms to each tweeter? Another thing I hadn't really thought about was matching the level of the tweeter to the woofer since they will be independent of each other...I know how to match left/right by measuring/matching the voltage at the output of the amp but not sure about matching with different drivers....one more question should I use different test tones to set the gain of the mid compared to the tweet...ie use 10k for the mid and something higher for the tweet?

Click to read more...

 

[iamamp3pimp 5,000+ posts]

im not sure, but i think 5k is pretty much standard to judge output voltage by...

 

[Rich B 5,000+ posts]

4.8k?!

Sounds like JL uses some pretty cr@ppy tweeters.

 

[Johnny Drama 5,000+ posts]

4.8k?!
Sounds like JL uses some pretty cr@ppy tweeters.

Or good mids that will play that high smoothly //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[JimJ 5,000+ posts]

Another thing I hadn't really thought about was matching the level of the tweeter to the woofer since they will be independent of each other...

Listen to it.

No test equipment needed other than your ears //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[Johnny Drama 5,000+ posts]

Either of you two above post in here or another thread with this crap youre gone.

 

[Rich B 5,000+ posts]

Or good mids that will play that high smoothly //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

Well yeah, that would work too.//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

I still prefer a lower crossover point myself though.

//content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif

 

[Johnny Drama 5,000+ posts]

Well yeah, that would work too.//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif
I still prefer a lower crossover point myself though.

//content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif

I personally perfer higher //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

My mids and tweets are at 4khz and my midbass are at 250hz

 

[goodstuff 10+ year member]

So if anyone wants to answer any of my questions instead of wasting time that would be great.

 

[jrouter76 10+ year member]

So if anyone wants to answer any of my questions instead of wasting time that would be great.

I f you are going active try http://www.diymobileaudio.com website those guys run alot of active setup systems.

 

[bikinpunk 10+ year member]

I personally perfer higher //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif
My mids and tweets are at 4khz and my midbass are at 250hz

Tweets playing 7.1k+

Midranges playing 280-6.3k

Midbasses playing 63-250

Different strokes for different folks.

As for test tones, play a track that's about in the middle of the playing range. If your tweeter is playing 4.8khz+ then just play a 10k or 12k track

 

[Johnny Drama 5,000+ posts]

Tweets playing 7.1k+Midranges playing 280-6.3k

Midbasses playing 63-250

Different strokes for different folks.

As for test tones, play a track that's about in the middle of the playing range. If your tweeter is playing 4.8khz+ then just play a 10k or 12k track

6.3khz-7.1khz there is a slight gap in there wouldnt you say? Unless youre using 6db slopes I see no point in that. Also up that high IMO its harder to get a midrange speaker to play smoothly vs a tweeter. Your response graph would look all crazy up that high with a mid...EQ nightmare IMO lol.

Mine is as follows.

Tweets 4khz+

Midrange 250hz-4khz

Midbass 50hz-250hz

All have a 24db slope

 

[bikinpunk 10+ year member]

Yep, there is a gap, but if you take a look at the FR response you'll see that there is plenty of sound in that range (the dip is around 5k, but 6k-8k has plenty of playback):

I do this to help cut on sibilance. The slopes are 24db for the tweeter & 12db for the midrange.

Your response graph would look all crazy up that high with a mid...EQ nightmare IMO lol.

Not really. Setting x-over points at the same spot creates a lot of overlap. I've tried a lot of spots and what I have now seems to work the best for me.

//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[Johnny Drama 5,000+ posts]

Yep, there is a gap, but if you take a look at the FR response you'll see that there is plenty of sound in that range (the dip is around 5k, but 6k-8k has plenty of playback):

I do this to help cut on sibilance. The slopes are 24db for the tweeter & 12db for the midrange.

http://img407.imageshack.us/img407/9333/leftsidefacingmicforwardp0.jpg

That would make me retune...personally I have 2 or 3 settings on my gear.

1)flat for RTA runs

2)gentle downward slope

3)tuned to how I like

Ill see if I can dig up a few of my old RTA pics when I get home.

 

[Johnny Drama 5,000+ posts]

I've tried a lot of spots and what I have now seems to work the best for me.
//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Very true...its all about what works best for you and what sounds best to you //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif