3” mid locations effect on stage

Boowi

CarAudio.com Newbie
Sep 20, 2022
1
0
What are the compromises of these various positions for 3” mids?
Mine are currently in the upper door (C), but I just moved my tweeters from windshield firing to on axis and it’s so much crisper with better stage depth.
I’ve read that on axis for mids (3”) don’t matter so much and it’s more important to keep them closer to the woofers (6.5”).
I’m wondering what the gains and compromises are for a 3” mid in general for the various positions given.


A-the dash corners (windshield firing)

B- on axis from the A pillars (where tweeters will be soon too).

C- leave them in the upper doors


2015 Nissan Titan (dash/doors just like an Armada)
Helix V Eight DSP
Stevens Audio 6.5s midbass/tweeter components
Faital 3” 3FE22

Thank you

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winkychevelle

CarAudio.com Veteran
10+ year member
Jun 21, 2009
4,027
184
I mean putting them on axis will help with beaming and give you more definition just like with the tweeters but I don't think I would make major mods for little gain. I might cut out the plastics grill in front of it in favor of some grill cloth. And seal the speaker face to the door car with foam
 

Jimi77

Junior Member
Sep 17, 2017
1,356
520
Depends. Everything is a compromise. Generally we're adding a 3 inch to create height and eliminate rainbowing in the front stage. We also want to create depth too. So you're best locations will A or B and C is a distant 3rd place although C looks like it would be the easiest for installing. On-axis is better than off-axis, although with a 3 inch it shouldn't matter that much because most tweeters cross low enough to eliminate beaming problems.

You can test the 3 inch in the dash locations by bunching up a towel behind the 3 driver to absorb the back wave. That will give you an idea if you like those locations better and if it's worth the time and effort to build dash pods.
 

Jimi77

Junior Member
Sep 17, 2017
1,356
520
Not wanting hijack the op but, how would mid in position c and the tweeter in b work?
I think the mid in position c would really wreck imaging on the driver's side. If the dash location isn't feasible then I'd look at the kick panels on-axis.
 

mat3833

CarAudio.com Elite
10+ year member
Mar 12, 2008
1,725
327
OK, Im going to speak purely from experience here. I just got my 3 way front stage installed about 6ish months ago and went through 6 different locations before I settled on my final one.

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Ignore the doors for the moment, they look completely different now.

Depending on your crossover point on or off-axis will not make a huge difference, but location is a big deal. You want to go with position A if at all possible. The further away from you and the further from each other your midrange are the better. If you are like me you will be playing 300hz to about 5k through your midrange. That means they are your primary point source for vocals, melody, and most of the meat of your instruments. By having the speakers in the corners of your dash it will be alot eaiser to get a nice wide Soundstage and with tuning you can have a proper left-right balance.

I went on-axis originally, but when I finalize the pods I will be doing a slightly off-axis approach. The midrange and tweeter will all be aimed at the center top of the rear window more or less. There is alot of math involved, but in order to get the same amount of on and off axis information from both left and right aiming for the "center" of the rear of the car is a good point to pick.

If you are more interested in aiming and technical stuff look up Justin Jazzy's tuning guide. He goes into pretty crazy detail about his install and he even made his own EQ tool that he shares with the community.

Matt
 
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ThxOne

AudioFreak
5,000+ posts
Jun 8, 2018
9,454
2,113
I think B for tweeters and B for 3" mids. As mentioned before it will help with beaming, clarity but also, you can reduce power as they are aimed right at you and still get incredible volume. Reduced power can = less distortion.

 

Bobbytwonames

Trigger Man!
5,000+ posts
Aug 28, 2018
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I'm all about learning. What is on axis and off axis? I could make a new thread if people get offended that I asked a question.
 
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JRsmoothee

Think For Yourself, Question Authority - MJK
10+ year member
Aug 12, 2008
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thescottishbear

Junior Member
Jul 24, 2013
160
110
It's an honest question. I've seen hundreds of installs and have never heard one person say on axis or off axis. Maybe we call it something different. That's what I'm trying to figure out.
On axis the drivers(speakers) are facing you like you would have in a home system. Off axis Would be side firing or in a specific amount of degrees away from you. That why when you look at a drivers frequency response graph you see 3 or different plots. It shows how the drivers play in freq. and intensity (DBSpl) Here is an example of my AMT pro's.
Screenshot (2).png
 

Bobbytwonames

Trigger Man!
5,000+ posts
Aug 28, 2018
11,710
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On axis the drivers(speakers) are facing you like you would have in a home system. Off axis Would be side firing or in a specific amount of degrees away from you. That why when you look at a drivers frequency response graph you see 3 or different plots. It shows how the drivers play in freq. and intensity (DBSpl) Here is an example of my AMT pro's.
View attachment 42878
Thanks for answering my question. Maybe we just called it imaging or something.
 

ThxOne

AudioFreak
5,000+ posts
Jun 8, 2018
9,454
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Thanks for answering my question. Maybe we just called it imaging or something.
What did you do in your Bugs for mids and highs? How were they "imaged" (placed) [mounted]?
 
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Bobbytwonames

Trigger Man!
5,000+ posts
Aug 28, 2018
11,710
-379
What did you do in your Bugs for mids and highs? How were they "imaged" (placed) [mounted]?
The black Bug had 6-¾" Pioneer pro's in the rear, 6-½" American Bass Midbass with a 3-½" Pioneer pro tweeter in the doors (4 way setup). The green Bug had 6-½" Audio Legion coaxials in homemade kick panels and in the rear quarter panels.

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