Tuning Question

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Apr 22, 2008 | 04:11 PM

CraigE

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Pro

Joined: Feb 2007

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From: Los Angeles Ca.

Tuning Question

OK, I got the 3Sixty.2 installed and have had a chance to play around with it. It is so neat to sit in the car with the laptop and play. I also have a decibel meter that I used to balance the individual speakers from side to side. What should the relationship be between the mid&tweet and the midbass. Currently if the mid&tweet is averaging 90 db the midbass is at 100 db. This sounds pretty good to me.
I'll post the settings and would appreciate suggestions.
Tweets..........HP 3500 hz......................slope 12db (passive)
Mids..............BP 900 hz ---3500 hz...slope 6db (passive)
Midbass........BP 80 hz ----1250 hz...slope 24db (active)
Sub................BP 20 hz ----150 hz .......slope 24db (active)

I'm just looking for a standard baseline, if there is one.
Thanks

Apr 22, 2008 | 04:26 PM

Kale

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Joined: Feb 2000

Posts: 51,504

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From: Sacramento CA

Quote:

Originally Posted by CraigE

Can the 360.2 do full 3 way active? I'm not familiar enough with it.
I would probalby try

MW162 70-700hz @ 24db
MD142 700hz @24db - 3500 @ 24
MD102 3500hz @ 24

I wouldn't go lower than 700 with the dome mid, and keep it sharp (24db or better) so you don't damage it.

Ideally, the less midrange you play with the midbass the better.

Careful on 700, listen for distortion. Bump to 800 if you hear any.

I know some people that run the MD142 lower, but I think they're playing with fire.

Otherwise - 150hz on the sub? I cant imagine that sounds very good. Maybe 80hz tops.
Also try flipping polarity on the sub, sometimes it will sound "better"

Balancing with a DB meter is a tough job. You might be measuring a spike in the response that needs to be EQd out, even though the rest of the speaker is fairly quiet. IE, if your speaker plays at an average of 80db, and has a 95db spike (resonance, whatever) then you're going to think the speaker is playing at 95db...

example

If this was your midrange and tweeter section, (1k+) you would measure the volume as 83db, even though its really only about 65-70db. So you could end up turning it way down to fix a problem that needs to be addressed otherwise. (Eq, speaker placement, etc)

Last edited by Kale; Apr 22, 2008 at 04:31 PM.

Apr 22, 2008 | 07:22 PM

CraigE

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Joined: Feb 2007

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From: Los Angeles Ca.

Thanks for the info. I am running the MD102 and MD142 thru amp ch A to the Dyn X362 xover (passive). There is no adjustment on the X362 which in my case defeats the adjustable xover on the 3Sixty.2. for ch A.... The MW 162 is active thru amp ch B. where there is full adjustability thru the 3Sixty.2.... I would need two more channels of amplification to go fully active. I don't want to give up anymore cargo space for another amp. If Audison made a two channel amp that I could hide in the cubby that would be the way to go.
I will try your suggestions.

Apr 24, 2008 | 11:46 AM

Fasthotrod

Melting Slicks

Joined: Mar 2004

Posts: 2,149

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From: NCCO Oklahoma

It looks to me as if you have too much overlap.

Mid to tweeter looks okay, but midbass to mid seems odd to me. If you mid is set to 900 hz, then your midbass should be there or below 900 hz.

Same goes for the sub to midbass transition. If your midbass can handle 90 hz as a cutoff, then your sub should play no higher than that. If it can play clean down to 70 hz, then set both there and make minor adjustments as needed.

Even though your mids/tweeters are passive, you can still set the 360 to high pass channel A at 900 hz at whatever slope you want to help blend the transition.

Obviously, every car is different... so ultimately you should tune it to what sounds best to you.

Mark

Last edited by Fasthotrod; Apr 24, 2008 at 11:50 AM.

Apr 27, 2008 | 01:22 PM

CraigE

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Joined: Feb 2007

Posts: 615

Likes: 2

From: Los Angeles Ca.

I set as close as possible to Kale's recommendations. It sounds better. I'm considering adding another Audison 2 ch amp. That would allow me to go fully active.
I see what you're saying about hipassing the mids/tweets with the 3Sixty.2 at 900hz and those slopes 12db or 24db (I am trying 24db) would override the 6db slope on the passive xover. Hmmm a simple matter of physics.
It sounds really good now.
Thanks

Last edited by CraigE; Apr 27, 2008 at 06:36 PM.

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