2016 Porsche Macan S - stealth SQ build

[SiW80]

I get what you are saying for sure.
And I'm reeling a bit - no install consideration at all?
That's insanity.

Bear in mind, I'm the son of a college math professor and professional musician. If there isn't both an art and engineering aspect to any hobby, I'm not interested - and I fully blame my parents for making me neither a left or right brained person. Damn them.

So I'm not saying doing anything for the purpose of just aesthetics - I just think of things from a show car perspective.

Think of mini trucks - anyone remember them? Man all these dead hobbies are depressing...

Most outsiders looked at them as stupid, over the top, and definitely had some paint schemes that were nothing but aesthetics - but that's the only purpose for paint, so I think that falls into the category of "serving it's purpose"...
My real point is, anyone who looked closer at those crazy trucks- there's a ludicrous amount of engineering to achieve their goals - and one huge goal was to be unique and creative. To contribute to the scene overall, rather than to bite everything your buddies already did.

So I just mean dressing up something that needs to be there for necessity anyway - there's always creative options. (1994 example)

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I miss my Velodyne


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[Ge0]

I spent my day dialing in sub to midbass transition as good as I could given the limitations of my current system. Bose factory amp sending weird boosted signal to my sub amp. Using sub amp gain, phase, and crossover adjust to try to get the best blend possible. I took a few quick measurements of each sub under identical circumstances. Same 1.25cu/ft sealed enclosure and same amp settings. Then I spent hours driving the 5 mile loop around my neighborhood testing the subs so I would not bother one neighbor too much at one time .

I think there is some major constructive and destructive interference going on between front midbass and sub playing a similar frequency range. I can get rid of most of this once I install my V Eight. But until then here are my findings:



SD4 Distortion


10TW3 Distortion


The Sundown Audio SD4-D4 is slightly more efficient than the JL Audio 10TW3-D4. Both subs exhibit similar distortion levels within the 10Hz to 80Hz pass band using 12dB/octave crossovers.

My primary music evaluation sources were:

a.) Metallica And Justice For All album tracks
1.) Blackened
2.) ...And Justice For All
6.) Harvester of Sorrow
9.) Dyers Eve

I chose this album for its snappy / articulate kick drum action. Here the drums are mixed a little higher level to accentuate them in the tracks. A great chest thumping balance

b.) DJ Icey
1.) Camino Real
2.) Gutterpump
3.) Blue Chips
4.) A little louder

I chose him for his bass filled funk explosions

c.) Knife Party
1.) Centepide
2.) Sleaze
3.) Power Gloive
4.) EDM Electronic Deth Machine

d.) The entire Crystal Method Vegas Album

e.) The entire Days of the New Yellow album

e.) Various Slipknot tracks

f.) Various tracks from the Joshua Redman Moodswing album

g.) The entire Miles Davis Kind of Blue album


Throughout my testing both subs sounded pretty darn good. It was hard to tell the difference with the Jazz albums. Not a lot of deep bass. But, the stand up bass was replicated great through the limited portion of the subs pass band.

I found the the 10TW3 was ever so slightly more articulate with the metal kick drum tunes. It reacted ever so slightly faster between quick and light passages. However, the SD4 provided a more pronounced whack that caught your attention. It sounded stronger between the two, like in your chest.

The SD4 owned the 10TW3 on bass heavy tunes. The 10TW3 could play them but seemed more forced like it was struggling to replicate but not over-stressed. When playing the same tunes with the SD4 it was immediately apparent that it was perfectly happy being pushed. It just sounded like it belonged there.

I have to be honest. I was surprised by these results. I thought the 10TW3 would be the clear winner. However, the SD4 was not going to take no for an answer. It did everything I need it to and kept asking for more.

Winner winner chicken dinner --> Sundown Audio SD4-D4

Now let's see if Crutchfield will still accept the JL Audio 10TW3-D4 for a refund.

Ge0

[Ge0]

Freaking forum. So difficult to post with pictures...

[Whiterabbit]

efficiency has to almost always win. It's like building an airport runway. I don't NEED the extra 500 yards to land a 737, but it's nice to HAVE, when the daily planes start rolling in....

[Ge0]

Guys, while I appreciate your nostalgia please post it elsewhere. Don't clutter my build thread. I'm trying to keep everything on topic.

Ge0

[Ge0]

efficiency has to almost always win. It's like building an airport runway. I don't NEED the extra 500 yards to land a 737, but it's nice to HAVE, when the daily planes start rolling in....

Interesting but totally appropriate analogy. If you have ever landed at John Wayne Int'l airport in LA then you would REALLY appreciate another 500ft. Planes come in hot and have to hit the brakes REAL hard due to space limitations in the center of a congested city.

Ge0

[Ge0]

Strangely enough Bose specifies both 4" and 3.5" drivers in the vehicles overall audio architecture. The center channel is easy to get to. So today I chose the 3.5" driver out of convenience. This size is used for center channel and rear fill effect channels. The slightly larger 4" is used for front door midrange only. I intend on cramming 4" midranges in all spots for consistency. So some modification may be required.

I know the ScanSpeak 10F has a 3-1/6" cut out. I start by rough cutting 3" holes in MDF for my templates. I can easily get the 3-16th" needed by adding a mild chamfer.







The problem with routing such small holes with a circle jig is that a majority of your work is hidden. You can't see the cut. You just need to feel it. In this instance with the circle to the left the router cut through the base material and the center plug shifted. This caused me to gouge out an ovular circle pattern before I knew what was going on. I am going to scrap this piece dammit!!!

Luckily enough, the circle to the right cut perfect. I can use it as a pattern to cut a new piece. Just tape them together and cut:










Now that we have holes, what about speakers?




More to come

Ge0

[Ge0]

Now let's copy a speaker:



Bolt it to the baffle with a 3" cut out



Flush trim it



Copy of the stock speaker shape



Transfer this to scrap plastic











Oh boy. Looks like I need to compensate for the larger driver. It overhangs the stock trim ring.



Ge0

[Ge0]

Now let's enlarge the rings with an oversized flush trim bit bearing to accept a 4" driver:

Start by cutting the holes with a normal flush frim bit.


\


The best oversized bearing size I had was 1-1/8th" I wanted 1" but did not have that. Fortunately aaaaai don't think this will be a problem:













I had to do a little belt sanding here to get this ring to fit at one corner:



But, the target speaker will fit. As soon as my overdue shipment of ResoNix comes in I can finish this job.

[Ge0]

I am done trying to properly upload photos to this broken forum software. If you want to see further build progress please visit DIYMA. I spend hours uploading and then re-uploading photos here just to find it did not work. I have better use of my time.

Ge0