2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install

Alphaskoom

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Finally, After about a year of buying parts slowly when things become in stock or i figure out more things i needed, i finally have completed my Audio system upgrade. I have spent the past week straight when I haven't been at work, knocking this out, missing out on some family time too. But i believe it was worth it.

Here's the main stuff i bought:
JL C2 650
JL C2 525 ( Component / NON X variant) more on that in a minute
JL MX 500/4 500 Watt 4 Channel amp
JL 4 AWG install kit
DS18 V4HL 4 Channel Line-out Converter

It Begins:
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install civic garage


I started with removing everything, seats, center console, trunk, everything had to go, hardest part of the seats was the stupid zip tie, holding the wires to the seat. BTW if you dont have an extendable magnet pen thing.. get you one, its totally worth every penny.
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210517_210128357

Center console has been out 3 times now due to previous projects so i got that down pretty quick, i still hate removing those wing bits by the shifter and AC panel, i just know they are going to break one of these days in the future. The Airbagplug ( bright yellow one under each seat ) just comes off by pulling on the clip part to maximum pull and it clicks and you end up pulling the whole clip out, its an intresting double click type of thing so to speak.
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210517_211933383

took a bit of a pause on the back seat, couldn't figure out how to remove the base cushion ( 2020 Coupe Rear Seat Removal ) more details there.
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210517_215409368

It does seem there is More "Sound Proofing" in the 19's and 20's that i haven't seen before ( these little plastic cavity cover things are one instance. IDK maybe I'm wrong, only seen these panels in one or two other posts.
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210517_220130846

I had a mini heart attack when i saw that grey box, thinking this was an amplifyer or something for the sport trim level ( more confusion to the audio setup, but it is only the AM/FM "Tuner Module". False alarm. The glue that holds these white cavity sheets in place is extremely weak, I don't expect them to hold up after a few years but that square cutout and foam insert on the door panel should hold it up sufficiently well for awhile.
Up next - Here's the back side of the Rear Corner panel, only thing holding it in is 4-5 green and yellow pop clips ( BTW the door kick plates gotta be removed first before the rear corners can come out / Simple pop clips hold it in place after the seat belt bolt is removed )
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210518_013449746
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210518_013458722

Just take your time, i ended up partially bending my headliner but its back in place now in the removal of the driver side panel - i don't really know the proper procedure for removing these as it was difficult to get them to cooperate as the upper trim panel didn't want to separate from the lower one on the drivers side. But i did get them separated on the passenger side.

- Removed the Plastic cover and gasped at how much wasted space there was in this side area.
so i added my Dynamat and Dynaliner to help with noise cancellation. Realistically, this area likely remains dry ( based on my estimates ) and could be filled up with foam, but i don't want to take a chance and used what i had.
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210518_194333562
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210518_195935054

No i did not take a dookie while i was in there.....i know what it looks like. This cavity is likely a full 3-4 inches thick of nothingness.

Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210518_202127707
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210518_214807356
Door panel Removed, Cue Guitar Solo.
I started to peel back the plastic sheeting with the white foam glue stuff... and realized its not a simple remove and reapply type goup I've seen other people work with. In the end of the day i opted to leave it alone since it is a weather seal for the door, i opted to rely on my dynamat on the door panel itself to do the heavy lifting.
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210513_204219268
While im at it, heres my newly refurbished Sweidit Leather Armrests and Door card inserts. ( no more Black hard plastic panels ) - Yes i know the Black trim panel is not totally black - I'm going to repaint those as the painters tape decided it wanted a bit of that black
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210512_232459799

While im on it, i ended up wanting to match the dashboard panels i bought for a Hatchback Touring
Ended up sanding down the black area so it was textured to give it a brushed metal look - i just think i need to clean it better to make the paint stick
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210404_203706049

Anyway onto the next thing
Running the main power cable was a royal pain, i shoulda lubed it up looking back on it, but i didn't want to damage anything in the process as many people will gladly cut a hole in a rubber grommet.
I Routed the cable through the grommet, and out above the break booster harness area, and wrapped it in heat tape to protect it, my original idea to run it behind the metal shield on the battery box thing didnt feel like the right move as that piece is removable with the battery, last thing i wanted to do was attach something permanent to a non permanent piece of maintenance.
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210520_224930205

Here's the Fuseblock bracket I ended up designing and making to not require any major modification, it latches onto the bolt that holds the ECU in place
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210323_210204255
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210323_214246329

Unfortunately the factory tweeter postions had to be modified to fit the housings. A casual dremel fixed that problem right quick.
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210519_005714539
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210519_013507460

I started jumping around as the days all meshed together and i worked on indoor things in the evenings as i reached stopping points, so bear with me.
Here's how i ran the doors, i started with the passenger door, not as proud of this one but waiting on more speaker wire to arrive, I was tired enough after the drivers door, i didn't care anymore. Id fix it if it became a problem. The wires run along the base of the door all the way to the back, verified by seeing them with a light in the speaker hole looking through the pop clip hole below the crossover. Time will tell if the angry window motor gets hungry.
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210520_224958746

And the Driver door.... WAY better option in my opinion, ill rerun the passenger door this way if something goes wrong.
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210521_204746009
its a bit hard to see but the wires near the middle yellow screw hole area, thats where the woofer, and main inlet wire go from inside the door to the near side of the door, i covered the areas that needed to be with felt tape to quiet them down and prevent rattling / cutting of metal / plastic. While i was in there, i was also running wire for my door illumination kit i bought from Japan ( which was never made to fit in a coupe btw :p ) i also zip tied the wires to pre-existing conduit in the backside where i could for security of wires.

Custom Wire harness I Made for radio and speaker outputs:
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210521_194711504

with color coded wires for easy channel identification.
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210521_200906360
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210521_212653611
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210523_150731184

Ill let you guys stare at what i stared at for hours on end... Wires... ALL WIRES!!!!!!!... btw i highly recomend you get a pillow or something to sit on.. that hard floor board is NOT comfortable after 5-6 days of sitting.
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210521_205603983

I had to add some Extra Foam tape around the speaker brackets to bring the speaker out further, the supports were hitting those 2 thinner areas around the speaker holes in the doors. It was still thinner than the Factory speaker btw.
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210521_222330058

While i had the AC and radio panel out, had to rig the Interior Illumination lights in the Center Console and Cubby hole area. ( no photos of the console light install but i just took a larger drill bit and drilled out the pre existing hole to be larger, and dremeled away the clip things that are there to mount the factory light. Heres the dash install picture. Its not straight on purpose, i wanted to be able to reach and unplug / replug in the light with it installed. if for whatever reason it had to be unplugged in the future.
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210522_145137966

Battery Installed and brackets all attached :
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210522_162411074

Perfect Home for the High / Low converter, a little velcro on the bottom of it and on top of the Airbag bracket thing held it right in place.
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210404_193949734

While the center console is out, dynamat! - you can see the light illumination clip area near the bottom cutout area ( this is where the shifter sits, viewed upside down )
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210405_172416917
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210405_173859630
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210411_022549095

Trimmed the rear deck to ease my worry of clearance issues at the cost of "SOME" Bass potential - couldnt find a good way to mount the Tweeters in the factory locations to secure them... so i just wrapped them with 3-5 layers of that felt tape and shoved em in there.. friction does wonders for light things lol.
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210412_135310171

Nothing like fitting a 5.25" speaker in a 4 inch hole :p - i did go back and fill the gap around the speaker with some of that Foam tape stuff.
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210412_161619278

Leather Covered Wrist rest area. - Got tired of the cheap vinyl wrapped brushed metal look here, only makes sense to be leather here now that i have it. - dont know why i didn't think of it sooner.
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210413_194509083

Rear Crossover mounting locations - Nice flat spot right here and its covered by the carpet - BTW that foam piece that's right above it, that's where you must send the audio cables through to the cabin area, by the rear seat belt reels. the foam thing is just a foam cube, feel free to remove it for later shoving into the hole. kinda a pain to go through there but the best i can say is to feed it from the top, outside of the reel's, trying to feed it directly behind and below it. and reach through into the trunk and feel for it in the hole. i dont have any photos of my rear routing but, from the crossover, i went sideways and used the pre-existing conduit to support the wiring.
I Personally fed both rear channels through this drivers side hole and the passenger side ended up going into that quarter sized hole in the trunk channel to the other side.
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210413_231841636

Wires....... this was the final stages, the end was in sight. I realize i didn't take any photos of how i ran the wires from the back to here, but its pretty self explanatory, just follow pre-exsisting conduit and it leads straight to here. The front 2 channels i routed through the radio area, and center console by my right hip as the driver, then it just drops to this cutout from the console area. the main power wire i DID end up cutting the grommet and routing by the hood latch release, under the corner foam and dead pedal area, - there's a nifty cavity to route things, its nice.
All wires that were needed to, come out of this carpet hole, theres a convinient ground plug litterally right next to the set of Red and white RCA's i just bolted the Amp Ground to. i didnt even have to use the Ground cable that came with my kit pictured top left. and compfy pillow, taking up the right side. An unfortunate side effect of this amp is the fact all the controls are on the bottom side, so i couldnt mount it until it was adjusted properly, which meant i had to have extra wires laying around for me to do this. Pictured here too is the power wire from the red highlow converter routed here, with the yellow tape around the single blue wire, i grounded that box to a ground plug found in the glovebox area, I'm sure many of you know the ground plug of doom. Surprisngly the things auto remote turn on feature worked without me having to manually find a ignition source to trigger it. It's the little things that were pleasant surprises that made all the heartache and pain worth it.
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210523_145557981

Here's my Amp mount wood piece, surprisngly it didn't cost me a second mortgage ( GASP )
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210326_211808878
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210329_161933380
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210329_161939621

All Back together ( ~ ish ) Ill need to trim and reconnect the speaker wires - i have extra but thats a good thing. Shes at least Driveable now, of course i still have the door panel trim to work on still, but given the week and a half long rain storms that keep happening, spray painting is out of the question for now.
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210523_213117444

Illumination showcase - this is taken with my phones "Nightshot mode" so things are dimmer than they are in these photos but still visible.
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210524_223850652.NIGHT
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210524_223842182.NIGHT
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210524_223901828.NIGHT

Originally ordered 50 feet of wire.... ran out after running the back and the passenger door.. ordered 50 more... 100 total feet of speaker wire, and this is all i have left.... always order more than you need, i had to jump around a bunch during this install because i didn't have enough of something, either wire or fittings. ( 3-4 trips to Home Depot or Lowes.
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210523_220341720

For those of you that read this whole thing, thank you.... I'm mentally and physically exhausted from this. But I'm quite proud of all that i did here. I hope it inspires similar stories in future endeavors. I included a few side projects in here as well as they were related to this whole process, as with any project car.. work is never done. but i am definitely going to take a break after this one.

Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210520_225225764


Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210424_173850521


Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install PXL_20210522_194836571
 

kaputt

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Very impressive work!

Side note: Do you have any more exterior shots of your car with the spoiler. I'm debating whether to add one to my coupe.
 
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Alphaskoom

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Very impressive work!

Side note: Do you have any more exterior shots of your car with the spoiler. I'm debating whether to add one to my coupe.
Yes, id get one. I don't like the way the coupes look without a spoiler... it looks like its missing something. Like a mid 70's Camaro without the dovetail spoiler on the back, it looks sad without it. Its big enough to say its a wing spoiler, but not big enough to compete with the Si's spoiler. For the mirror view blocking - i cant speak for the Si, but yes the spoiler does get in the way of your view, but only slightly, it looks like a body spoiler from the mirror point of view, you cant see under it. but with modern backup cameras, the back window is less necissary anyway for backing up. on a personal note. I didn't want this car to be a poser car, its not an Si and i didn't want it to look like one either. i think the spoiler adds enough sporty-ness to it to spice it up without going overboard, and its actually a wing, unlike the sedans brick lifted spoiler on the Si trim which im not a fan of.
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install car spoiler
^^ After the first / second wash.
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install spoiler trimmed
^^picking the car up to bring her home brand new
 

kaputt

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Appreciate the spoiler picture.

I also hate to keep moving the topic away from your audio work, but what did you do the window trim with? It is a wrap or did you use one of the pre-cut kits you can buy online?
 
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Alphaskoom

Alphaskoom

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I don't mind at all.
It was a precut kit from Ebay,
looks like they added a few more pictures since i ordered it before - and i ended up buying 2 of them since i screwed up the drivers side the first time. its not a permanent solution, ill likely have to redo it again I'd estimate about every 3-5 years or so.
Although I'd venture to say proper application and prep work is more than half of the battle. It stretches, don't let it stretch or it will squeeze it self off of the surface in time and washes.
https://www.ebay.com/itm/173795660378
Edit : and one more picture of the side from the first wash, ( mainly for the spoiler, this was before the chrome delete )
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install IMG_20200311_093912

and heres one more of the chrome delete, its the best detailed picture i got of it
Honda Civic 10th gen 2020 Coupe Sport Interior teardown and JL Audio Upgrade / Dynamat install IMG_20200314_135836
 
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Doc_Mello

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i opted to rely on my dynamat on the door panel itself to do the heavy lifting.
Not to necro-post or anything šŸ˜, but how did this option work out for you?
 
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Alphaskoom

Alphaskoom

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well its hard to say quite honestly, it's probly helping, but when things are at least mild temperature outside sometime ill get to peeling the weather plastic off the door and line the interior of the door itself, i think that will still work out better in the end. the biggest complaint now is just road noise, which could be my tires. still using the Goodyear eagle sports.

Soundwise.. i still want more Bass...just don't want a box in my trunk or a box taking up rear passenger foot room that a underseat sub would do.
 

Sean Goodman

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Well i got started today with mixed results, got the center 350x fitted no problems at all.

stripped down drivers door (left door eu spec fk8) and got a load of sound deadening material inside the door skin to start with.

things then started to go a bit wrong as follows:

1) couldnt get the c2 650 fitted as the spacer adaper i bought was 0.7ā€ / 17mm thick. This meant that the frame of the speaker fouled on the door skin around the speaker cutout behind the adapter, the speaker needed to go back anoth 5mm or so to enable it to site flush on the adapter. Without removing some door skin material i would be able to use these spacers and i dont really want to start hacking the hole in the door skin to make ot fit. I went out and picked up some universal spacer rings which are a tiny bit thinner than the the oem one, the downside is that in order to mount them i will have to drill 4 small holes for the mounting screws but i can live with that so thats where i will resume in the morning.

2)have an odd wiring issue, the wires to the tweeter are green and yellow which matches what i have seen on the wiring diagrams posted here on other posts. And according to these posts the yellow is the + to the tweeter and green the - ( somebody please shout if this is wrong as this is how i am going to connect them up tomorrow.

here is the odd thing though, according to the wiring diagrams posted here in forums the front left speaker is detailed as having lt green as + and lt blue as -. The connector at my door speaker has pink with grey blobs every cm or so and grey,

whats going on here?? Its not too much of a problem just swopping out the speaker but later could screw things up if i am connecting an amp up based on wire colours.

3) last thing i am going round in circles trying to work out what bits to use to mount the tweeters in the sail panel, i must be having a bit of an off day but i just cant seem to work out what bits to use to make it fit, or do i need to modify something?

and guidance on the three points above would be much appreciated as i am going to continue tomorrow hopefully getting the driver door back together and the other side completed as well
 
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Alphaskoom

Alphaskoom

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1) I feel your pain, my Speakers didn't sit flush, i ended up using a modified "boom mat" speaker baffles that i cut half of them out of to make a rudimentary weather shield ( they sounded horrible as they were btw, don't use them without cutting out a crescent moon shape on the back as i did to deflect water ) as i noticed water spots on my speakers after running them unprotected for a few months. Its also thick enough to make a decent buffer / spacer for pushing the speaker towards the interior cabin so the speaker doesn't sit flush against the door itself. So its ( Speaker -> Modified Boom mat -> adaptor -> door itself ) your making a sandwich basically, but that gave me proper spacing. it still will hit the window that rolls all the way down so it is a possible issue after a few years just something to look at every once in awhile but it doesn't hit the speaker, just the mat thing. and only just.

2) i noticed that too, the rear speakers match normal other civics but at some point between the radio and the doors, the speaker wire colors change, i gave up and ran my own wire everywhere instead of trying to figure it out honestly ( in total i used 100 feet of speaker wire between my amp / hi-low converter, radio adaptor plug and speakers. )

I also know the speaker wire colors are different between body styles and trim levels ( 3 body styles and at least 3 different factory audio configurations as well so theres at least that many different potentials and its difficult to find a good answer)

3) i took a Dremel to my sail panels after removing the factory speaker, just enough to use one of the adaptor pieces that came with my JL Tweeter mounted through the front with the E bracket screw piece on the back to hold it in there. The sail panels are like 15 bucks a pop from what i remembered, so if i ever want to go back to factory i can buy new ones of those for cheap. ( at least as long as parts are available anyway )
i don't recall which ones but i CAN show you which ones i DIDN'T use lol.
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