2012 Prius Package 5 - is this stereo upgrade possible?

I've got a Prius 4 with the upgraded JBL Premium System and needless to say I was less than impressed with the sound quality. Where is the bass?!?! And those rear speakers are just worthless! I consulted with a few stereo shops in LA and I found one on Olympic (West LA). Audio 2000 Installations for mobile electronics and home entertainment | AA TECH DESIGN | - Home

After speaking with the installer, I'm going to put in a 5 channel amp, an audio controller, a pair of Focals in the front and a pair of Focals in the back. He's also going to build a custom fiberglass sub enclosure (for the back left corner) and put in a JL 10" subwoofer.

I'm also thinking about putting in front parking sensors as well (they install those too).

 

Yes it was Virgil. Great guy, very helpful. Yes, I am keeping the head-unit (I like how its all integrated into the car).

The plan is to get it done by the end of the month. Will let you know when its done.

 

I'm dropping it off tomorrow. Virgil said it will be done in four days. Will let you know how it all goes!

 

Is the headunit upgradable in the 4/5 packages on 2012 models?

 

I got my car back yesterday from Virgil. Man, did they go an AMAZING job. Check out the custom enclosure they built! Looks (and feels) like something direct from the factory.

 

Also check out where he mounted the bass control. It looks like it came with the car!! He put the five-channel amp under the driver's seat. Couldn't have been more satisfied.

 

I'm a bad one to ask about performance issues/battery life. As long as I'm getting better mileage than my Porsche C4, I'm happy! If installing the stereo causes my performance to dip a bit, I'm not going to stress about it.

As for what I installed in my 2012 Prius 4:

JL 10" Woofer
Kenwood 5 Channel Amplifier XR-5S
Audio Controller (for bass) - no idea what brand
Focal IC165 (rears)
Focal IC690 (fronts)
Custom Fiberglass Enclosure for Sub

 

And the cost if you don't mind?

 

$2,900. The bulk of the cost was building the custom fiberglass enclosure.

 

If you're looking into putting a sub in your car (or switching out the speakers and what not) use these guys. Ask for Virgil. He's legit!

Audio 2000 Installations for mobile electronics and home entertainment | AA TECH DESIGN | - Home

 

Looks like a great installation, and nice to see how well a 10" fits that space.. How much, ball park, for the custom sub enclosure? I found a guy that does just the enclosures (right hand side only), for around $250.

Gen 3 Prius right Subwoofer Enclosure

 

I contacted Virgil.
We went back and forth a few times,
and NO, they won't sell the sub enclosure separately.

Dang, there must be some industrious person around here that can start building these sub enclosures and make a profit.....

I asked MGB4Tim if he could rent the mold for a few days....

 

Looks great! I can't wait for the snow to go away to also follow ALL_600D's steps to put my Boston 10" into the cubby. Must be great to have a nice subwoofer and a useful trunk at the same time!

 

In case you're looking for a custom fiberglass sub enclosure. I believe I paid $250 for mine at Mobile Fantasy. I dealt with Mike. (no affiliation)
Here's the thread I posted a while back:
Just added my Custom Sub Enclosure... | PriusChat

 

I just started the process at the same place , But I'm not doing a sub

Keeping Factory Head Unit (Non JBL)

Alpine KTP-445U Power Pack behind dash
Focal ISS 690 6x9" in Front
Focal Coaxial 6.5" in Rear

Tom's review made me trust this place has worked well with Prius in the past, that sub enclosure photo says it all.
Hoping this will give me a good bang for my buck upgrade from the notoriously shitty stock speakers.