SQ sound system in a 2020 Prius Base

After a long pause, its time to get back into the SQ game, so I decided to start a new build.
The main goal is to build a stealth system in my daily driver.

The car: 2022 Toyota Prius.

Source: Ill use two. First, the OEM head unit connected via high level into the DSP. Second, iPhone/Ipod touch into a Topping D10 DAC via coaxial digital into the DSP.

Speakers: Italia HiFi BL4 Carbon Fiber/Copper 3 way + 12 inch sub

Amps: Two Italia HIFI D410 4 channel amplifiers. One for each side. Channel 1, 100 watts for the tweeter. Channel 2, 100 watts for the midrange. Channels 3 and 4 bridged to get 275 watts on the midbass. D135 Mono amplifier for the subwoofer (500 watts).

Processor: MINIDSP C-DSP 8X12 DL

Installer: Me.

Picked the car up from the dealer on June 22, 2022.









Removed the hub caps and got some wheel center caps.





J.

 

What do you do the first day you get a new car?
Take it apart, of course. LOL.
The top of the dash comes out in under 10 minutes, 5 if you hold my beer.

 

The doors also come apart pretty easy.



Added a bit of deadener and put it back together.



Moved onto the hatch area.





Then the headliner.







J.

 

lso did a bit of measuring.
First, had to get the mic out and measure the OEM system.





Then used the osciloscope to measure clipping on the front and rear speakers.
With a 1 khz 0 dB tone, the fronts clip at 51/62 and the rears 53/62.
With a 1 khz -5 dB tone, the fronts clip at 56/62 and the rears dont clip.
With a 1 khz -10 dB tone, the fronts and rears dont clip.
With a 50 hz 0 dB tone, the fronts clip at 54/62 and the rears 61/62.
With a 50 hz -5 dB tone, the fronts and rears dont clip..
With a 50 hz -10 dB tone, the fronts and rears dont clip.



J.

 

The amps are here, just waiting on the speakers and this should move pretty fast.





J.

 

Speakers are here.

 

Sub is here:

 

Wires are here:

 

Also changed the interior bulb to led.

 

Weekend progress.
First grabbed the OEM high level signal from the dash speaker harness.

Heat shrink ready.


Solder.

Individual heatshrink.

Heatshrink in pairs.



Keeping the OEM theme with electrical tape.

Label heatshrink.


J.

 

Also started with the tweeters.

Made some rings with acrylic and mdf.



Aiming.




Next step is shaping and boy filler.

J.

 

Used some fiberglass bodyfiller, sanded then regular body filler and sanded some more. Had 80 and 240. Need to get 320 to finish.










J.

 

Weekend progress.
Sandig, sanding and more sanding.

Running speaker wires.






Terminating speaker wiring.

 

Not a lot of progress this weekend.
Installed the USB extension in the center console.
The idea behind that is to keep the IPod in there. The right one goes into the Topping D10S, the left one is just 12v, so I hook up the Apple CCK3 into both and the Ipod into the CCK3.

Also added the "I dont trust you with my system switch", which cuts the remote wire so the dsp and amps wont turn on.





J.

 

First set of speakers are in. Woot, woot.
The original speakers mounted from the top. Had an idea to mount them from the bottom and make a "waveguide". Made a ring with 1/8" mdf and held it in place with wood tongue suppressors.

Used tape to make a mold.

Fiberglass body filler.

Regular boy filler.

Covered them with black felt.

Speaker mounted.

Made the baffle from 1/4" acrylic, used speaker gasket tape on both sides of the baffle and duct seal on both sides.

Added some deadener and hot glued everything that could rattle.

Covered with speaker grill cloth and into the car.

J.

 

If you ever come to Texas, shoot me a pm.

J.