2004 Toyota Sienna

[James Bang]

I haven't measured the airspace of the dash pods yet, but it's sounding like it might need to be bigger. The 4.5" Seas are high passed at 160hz and the bottom end of vocals are much to prominent than the rest, even after -6db cuts
The spec sheet shows a nice curve with the driver in a 2.5 liter sealed enclosure, so I'll aim for that.

I have two options I can think of without needing to build new pods (which I probably should because they don't look the best... ...if I do rebuild, I'll try tweets in the sails and midrange in the same location, slightly more on axis.
1. Vent the pods into the dash. The pods currently sit on top of the OEM speaker location to vent to.
2. Use a uniseal and add a length of PVC pipe to gain the additional desired airspace that routes thru the OEM speaker location


Technically, I supposed I can try #1 first then add the pipe if the venting doesn't work out. I'm really liking the punch/kick/attack of the sealed pods, so I'm leaning to staying sealed.
Testing to come...

[James Bang]

Hole saw set arrives tomorrow so I can drill the vent holes in the dash pods. Uniseal and 1.5" PVC on deck to test afterwards. The pvc pipe will need to be 17" to gain the desired 0.5 liters. The driver side will be able to accommodate that easily, but I'm not so sure about the passenger.

[James Bang]

No pics, but I've been slowly working on the midbass door enclosures. I can only squeeze in maybe a hour here and there.

I only have a few spot to fill in with bondo hair (sand paper is cheaper than Evercoat products lol) and final body filler before deciding how to finish them. Leaning towards matching the dash pods. I like the slight plush feel the carpet gives under the grill cloth.

[James Bang]

Aw chit, we're almost there.

I measured one of the door enclosures and it came out to almost perfectly 28 liters /1 cuft, not counting speaker displacement.There was some leakage, but a round of milk shake should handle that.

Some sanding and modifications needed as the passenger side rubs the gasket/molding. It also butts up against the seat adjustment switches, So I'll just be wrapping them with grill cloth without the carpet. Or just leave it be with the groovy bondo camouflage.

The passenger side was fired up for just a few minutes and I'm really liking it, but there's a lot of tactile feel on the passenger seat. Not sure if it's the sub or midbass.

[James Bang]

I was also able to add the pvc pipes to the dash pods. They still have a little peak around 250-315hz, but it's far more tamed than prior.
The deh-80prs is limited to cutting only 6db but more is needed. Using the added EQ on PlexAmp and it's much better.

To get the pvc pipe to fit on the passenger side, the OEM JBL amp had to be removed. It was right next to the ECU, thankfully, it was just the amp that was in the way

Uniseal, PVC, and cap.

[James Bang]

Door enclosure completed.

Wrapped with grill cloth. Not the best match with the doors, but it is what it is. It's my old daily non competing car.

Time to sit, listen, tune, tune tube. wash rinse repeat.

I have some issues with it, though. The clearances are very tight and the driver side enclosure rubs a bit when opening and closing the door. I'll have to live with it.

Other than that, it's sounding great. The output potential is crazy. I definitely can't/won't use them to their potential as the midrange and tweets struggle to keep up, along with my ears. They're currently bandpassed frok 63hz-200hz. I don't know the exact HP as I have to use the analog HP pot on the amp, (my way to run 4 way with this HU that's limited to a 3-way Xover network). I'm running a long DIY Y-cable from the sub RCA Outs on the HU to the midbass amp and sub amp. The sub output on the HU is just low-passed at 200hz, and the amps' crossover will split the midbass and sub. The issues I have is not knowing the exact xover points between the midbass and sub, and the time alignment is limited to the midbasses.


Some pics







I've only gotten a short tuning session so far. One thing I noticed was how quickly my ears experienced some fatigue simply by having the left midbass slightly louder than the right. Once they were leveled, it was a drastic difference.
If one side's midrange or highs is more hot, it'll just shift my center focus and/or cause the center to bleed to the left or right, but it wouldn't have the fatiguing affect like the midbass did.

Welp, now time for a break before I start fabricating one IDQ 15 IB in the rear quarter panel. The sealed enclosure for 2 15"s will be used for now.

[James Bang]

[James Bang]

Got the system almost all tuned in (by ear) with the limited amount of processing I have with the DEH-80prs.
After getting all speakers acoustically in phase, all was satisfactory except for the 80-100hz range pulling far left. I initially thought it was either the left midbass being acoustically amplified or the right side canceling or having a void for some reason. It turns out the 80-100hz range from the right midbass was reflecting off the left window hitting my left ear hard. I shifted the balanced all the way to the right and 80-100hz was still coming from the left. EQ attenuation of the right midbass cleared it up. I found it interesting as the fix seemed counterintuitive to what I was hearing.

Time to listen for potential issues I maybe haven't noticed yet, til I possibly get setup/measured / rta'd

[James Bang]

To protect the midbass drivers, I decided to just purchase some grills from Amazon. I chose a set with the closest diameter to match the enclosure. I had to sand down the plastic grill rings to fit snuggly.

[BigAl205]

Those turned out nice.