2016 Porsche Macan S - stealth SQ build

[SiW80]

Fun with circles:

I have an idea on how to mount the door based midranges.
Attachment 11479

Attachment 11478

Can’t see pics


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[Ge0]

Can’t see pics


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I'll re-post tonight.

Ge0

[ckirocz28]

Now I will move the factory sub above the hidden cargo floor and aim it all over the place.


Similar to the sub firing up under the floor but now sitting on top as if mounted in a baffle to directly fire into the cabin:

Attachment 11390


Interesting, the peak at 80Hz is reduced significantly. However, there is a significant dip created at 100Hz.
Attachment 11394



Mimicking a floor mounted sub pointed backwards:
Attachment 11391

This orientation yields a slight boost at 80Hz over the up-firing orientation. Also, the dip at 100Hz still exists but is less pronounced:
Attachment 11404



Mimicking a right side firing subwoofer that would be mounted in the left side panel:
Attachment 11392


Results are very similar to the rear firing sub orientation. Slightly less boost at 80Hz and dip at 100Hz:
Attachment 11405



Mimicking a left side mounted sub firing right. Cable lengths prevented me from moving all the way over to the right:
Attachment 11393


Results are within 1dB of right firing sub orientation. This is within measurement to measurement error:
Attachment 11403


There are a few commonalities no matter how the sub is oriented:
Attachment 11406


1.) The sub adds no low frequency extension beyond what the front doors provide.
2.) Orienting the sub differently does not add any low frequency extension.
3.) No matter how the sub is oriented there is always a suck out at 60Hz.
4.) Boost at 80Hz and dip at 100Hz varies with sub orientation
5.) Installing the subwoofer under the cargo hatch floor adds bass boost. As a matter of fact mounting under the cargo floor eliminates the dip at 100Hz.
6.) Folding the rear seats down and opening up the hatch to the front cabin harms bass response.

For sure Bose is altering vehicle frequency response through equalization. Whether or not they did a good job at this is not the point. The purpose for this exercise was to see how different subwoofer orientations impact frequency response of a known system whether it be perfect or not. It is very apparent that sub position does impact lower frequency response to varying degrees.

I also suspect that Bose is allowing the frequency range of the front woofers to overlap the subwoofer to a large extent. This may be the reason behind the peaks and valley's seen in response as the sub is moved to different positions or is mounted under the cargo floor.

Next up I will place an aftermarket sub and amplifier in the vehicle to see if I can improve bass response further.

Ge0

It's a Bose system, so there is definitely a lot of dsp work going on. Their motto is "superior sound through cheap speakers and massive equalization".

[Ge0]

It's a Bose system, so there is definitely a lot of dsp work going on. Their motto is "superior sound through cheap speakers and massive equalization".

That's all going to change on Tuesday:

[Ge0]

I have the plastic mounting rings but need foam buffers to prevent vibration:



















I lack the proper tools to make this look pretty (no laser cutter or 3D printer). And, I could have done this sober. But, it will be functional enough. I will bolt the midranges to the rings then insert the foam rings and bolt it down into the stock location in the door panel.

Ge0

[Whiterabbit]

the boring but critical part.

I'm waiting to see the amp rack design

[geolemon]

I have the plastic mounting rings but need foam buffers to prevent vibration:

I lack the proper tools to make this look pretty (no laser cutter or 3D printer). And, I could have done this sober. But, it will be functional enough. I will bolt the midranges to the rings then insert the foam rings and bolt it down into the stock location in the door panel.

Ge0

To be honest, I am always MORE impressed when I see work done that is self-evidence of someone who actually understands the things that matter, and the things that don't.
I absolutely love when people invest more in the things that matter - and have the confidence to not skip or skimp, but use knowledge to work through the rest.

And to that end - I've always either used the 3/8" foam tape, or the Parts Express speaker caulk rolls since I didn't like how the foam tape leaves you with a seam, even if you overlap and splice.
I like the idea of cutting seamless gaskets from foam sheet. Is this just - craft store foam sheets?

[Ge0]

the boring but critical part.

I'm waiting to see the amp rack design

It isn't going to be anything fancy.

Sub amp here:






Main amp here where the factory amp currently sets:



You've talked me out of bling with lights and mirrors. I have settled for something a little more practical instead.

Ge0

[Whiterabbit]

simple and not fancy doesn't mean inelegant. I'm looking forward to seeing a nice welded metal frame or similar, not a melamine particleboard and white-glue contraption complete with popsicle sticks....

Bonus points if you make it look like Porsche designed and fabbed it


As an example, I did not use zipties in my amp rack, I found the same fuzzy cloth tape Mercedes uses in their wire harnesses and used that, so my harnessing integrates seamlessly into the car. Down to using the same wrapping patterns and spacings.

[Ge0]

simple and not fancy doesn't mean inelegant. I'm looking forward to seeing a nice welded metal frame or similar, not a melamine particleboard and white-glue contraption complete with popsicle sticks....

Bonus points if you make it look like Porsche designed and fabbed it


As an example, I did not use zipties in my amp rack, I found the same fuzzy cloth tape Mercedes uses in their wire harnesses and used that, so my harnessing integrates seamlessly into the car. Down to using the same wrapping patterns and spacings.

Well, I don't own a welder. The last time I welded was back in high school metal shop.

You're free to come over and lend a hand though

I plan on making the amp rack out of HDPE and aluminum extrusion. I haven't designed it yet...

Ge0