2015 - 2020 Honda Civic Amp and Sub Install

Parts used linked in the description below!
Watch a full tutorial as a 2018 Honda Civic will have an amplifier and subwoofers installed to the factory radio. Note this Civic was equipped with the factory amplifier, however, it wasn't equipped with a factory sub.
This video applies to Honda Civic models for years 2015, 2016, 2017, 2018, 2019, and 2020. This video also includes amplifier wiring, amp installation and testing.
Click here to see the radio install video on this gen civic:
• 2016 - 2021 Honda Civi...
Click here to see the front door speaker / tweeter install:
• 2015 - 2021 Honda Civi...
Click here to see the rear deck speaker install:
• 2015 - 2021 Honda Civi...
Click here to see how to set your gains on your amplifier!
• How To Set The Gains O...
If you have any questions, leave a comment below! Be sure to like and subscribe!
Parts used in this install (Amazon Associate Paid Links):
*Rockville DB12 Amplifier: amzn.to/3w8eLGZ
*Boss Audio 12" DVC 4 Ohm Sub P126DVC: amzn.to/3QMXBGF
*QBomb 12" Ported Subwoofer Box: amzn.to/3dARWp1
*4 Gauge Amplifier Wiring Kit: amzn.to/3zIWXT2
*Pac LP7-2 Line Out Converter: amzn.to/33lRh5u
*ABS Plastic 12x16" Sheet: amzn.to/34W9TtW
***Recommended Bass Package: amzn.to/3kVtv62
Disclosure: As an Amazon Associate I earn from qualifying purchases

[@ProvoBeastAudio]

Parts used linked in the description of the video!

[@Ewabeach706]

Howzit I have a 2019 Honda civic hatchback, I don’t have the speakers in the trunk, but they are on the back doors. Do I tap in from there instead?

[@junedudefred7157]

You sir are Amazing for this Video! One of the best and most thorough Installs on KZbin.💯

[@aaronzamora9975]

By far the best installation video man right to the point and perfect step by step ❤

[@doomsayer559]

I bought a '19 Si and it has a very crudely implemented sub and amplifier. Most connections are electrical tape. Yikes! This gives me the means to understand how to install it correctly with the factory HU. Thank you very much.

[@BlackLung911]

Looks nice, you are getting much better with how the install looks & is presented. Keep it up. :)

[@PotterSauce]

Sir! 🎉Thank You🎉 for posting such an in-depth and visually easy to follow installation video! With your help I was able to completely self install a sub and amp into my civic si. Thanks!!

[@RajunCajun1]

This is the most clean install I have ever watched! What did you do to keep the subwoofer box from sliding around? I love the idea for mounting the amplifier! No holes drilled in the floor!!!

[@tritongaming5715]

DO NOT USE THE 12V WIRE HE USES im driving a 2016 honda civic, i wired everything exactly the same, ive checked everything and ive had multiple other people look over my wiring, ive taken a volt meter to everything, and it all seems to work fine EXCEPT THE 12V Constant it only suppls 10V out of the factory harness and after passing through the converter to the signal wire it only has about 9.50 and it needs 12 to power on, after tapping into the wire he shows my rear bsck up camera no longer works and my trunk lid opens when turning the vehicle on or off

[@yutarosasaki8604]

You need to get a capacitor if you don’t have one already.

[@Group_Anonymous]

WTF 😂

[@braydenalbarado5438]

How did you fix it

[@salemsellers3854]

So which one is the correct wire for 12v constant?

[@TheSmileyTek]

Super clean. Proper install. Exactly what I was looking for.

[@ryanchris6899]

I’m struggling with gain control. This line out converter is very limited and you don’t really get to pull the best lows out for sound quality. I feel like there is too much highs and mids still coming through the sub. I feel like you also need to add a bass filter to isolate the lows.

[@Carlos-qu8ue]

The amp placement is not convenient if adjustments will need to be made on the amp. Tapping in to the wires in trunk for the Line Out Converter sounds problematic as comments above have mentioned. This is my set-up below. Power ran to the rear of civic Wire from Line Out Converter to amp to power it up Speaker wires tapped in to the head unit for line out converter Double sided RCAS to go from the AMP to the Line Out Converter

[@dw7292]

What are you running power from the amp itself? && the amp is powered by battery? Is this what you’re saying I’m trying to do the same thing today rn as we speak.

[@YellowScubadiver]

Excellent video sir!

[@weaseltown]

Isn't the LOC unnecessary if the amp has a level adjustment like this one? Should already support high level input from the speaker wires, right?

[@Nacturnal702]

2016 honda civic 4 door sedan/ 12v constant you show in video is trunk release, wire ,,won't it trigger trunk to open everytime amp comes on?

[@aakudev]

Thanks buddy, I dont have an amp, but a small active subwoofer 8 inch with max 200w. Instead of taking the red wire to the battery can i just tap it to under dash constant on fuse?

[@Sac_slappper_4rce]

About to start on my 2019. Got to do the big 3 and figure out where to put 3 big ass amps. I just need some motivation atm lol!

[@sethbrooks4988]

How did it go? Just got my 2019 today and want to do this but wanna make sure it works

[@Sac_slappper_4rce]

@@sethbrooks4988 I'm officially starting today lol. I just got an android head unit with digital output, I'll start with that. I can already tell basic sound proofing on doors and the trunk is going to be a major improvement.

[@StateBiscuit]

​@Sac_slappper_4rce how come you're going with a new android unit?

[@Sac_slappper_4rce]

@@StateBiscuit I'm going all out on this system. The Joying android unit will be linked to an Helix DSP pro mk3 by optical for the cleanest (and flattest) signal possible. System will be an active 3-way front stage + sub. I could have kept the factory unit but some have bass attenuation/compensation depending on the volume (not sure if Honda does it tho) but now it wont be a concern at all.

[@StateBiscuit]

@Sac_slappper_4rce you really are going all out. That's £1000 on these two alone! Mind listing all the things you will be upgrading? I've got the civic with uk premium audio which doesn't come with any sub or boot speakers and I'm thinking of working my way inside by upgrading speakers than amp etc etc

[@kissirain4463]

Can you use the same wiring technique to install an 8"powered amplified Bazooka bass tube? Same wire kit and same line out converter?

[@raczyk]

How do you amplify the speakers in side the cab, front and back? Is it necessary to do?

[@danielgitlin2711]

On my 17' Civic there is no wire in the pin where you tapped the constant 12V for the LOC, it is just empty. Should I just plug the wire in that place assuming that it's the 12V?

[@tritongaming5715]

I just tapped my 12 wire from converter to exactly where he runs it in the trunk, now my trunk opens when I turn off or start my car, my reverse camera no longer displays, and when I checked how much power is coming from the factory harness it was only 10v and after it runs through the converter to the amp it only has about 9.50v and the amp needs 12 to power on

[@tritongaming5715]

I'm driving a 2016 honda civic

[@raczyk]

Does any EMF come from the amplifier under the drivers seat frying ones jewles?

[@jameshgriff]

Hi can you tell me how to tap in if there's no speakers in the rear deck and I have to do it in the rear door I can't figure out exactly how to tap in you say just get it in the tower or whatever but that doesn't really help

[@luissiliezar7357]

I got a question what if you do have a factory amp and sub how would you go about the line out rca would you have to cut them too lmk pls

[@SukhrajB]

why did you opt to put the amplifier under the driver seat, rather than on the trunk for easy access? by tapping the rear speakers, did you not lose out on a lot of low frequency? From what I understand, these civics have poor stock radios that do a lot of cutting of the signals to not destroy the factory speakers. I noticed you did not use a Lc2i convertor. Instead you opted for a generic LOC. That means you are not getting the full signal for your amplifier right?

[@ProvoBeastAudio]

If your amplifier is setup correctly, no need to have "easy access" to it. We love installing amps under the seat as they are less likely to be damaged or messed with. We didn't experience any bass rolloff, and additionally the customer did not want to opt for an LC2i. You are welcome to spend more for an LC2i, and as for "full signal", many variables there. We set our gains to the factory audio using an SMD-DD1.

[@SukhrajB]

@@ProvoBeastAudio thanks :)

[@federicocosio9480]

Couldn’t find the constant 12v wire, can anyone help

[@gamescube]

Great video. Do more videos with the hatchback versions and that also have it or an upgrade oem subwoofer

[@pennyjohnson7818]

Does the fuse give more power to the amplifier on car

[@pennyjohnson7818]

Learning how to do a great job does hooking up sub to the door ore to the remote wire give more power

[@pennyjohnson7818]

Text back 🔙🔙🔙🔙

[@RKCorinth]

@@pennyjohnson7818 no

[@ProvoBeastAudio]

@@pennyjohnson7818 No, a fuse simply protects the run from the battery to the amplifier of any short circuits / fires, etc. A fuse should be installed as close to the battery as possible.

[@david029014]

how do you wire if you have factory subwooder on a honda accord ex-l 10 speaker system

[@Zerocool07]

Im sorry but how will the amp turn on if the power cable is directed straight to the battery ? Didnt get to see where the switch for the amp? Where did u get the source of the amp to turn on and off? Did u get connection from the stock radio? Thanks in advance

[@SloWB0Zz]

That’s why you must connect the REM cable, this takes the signal from the speakers and turns on and off your amp.

[@AX-qe5wk]

…rem cable bro….

[@newbie12003]

If i wire the 12 v from the line out converter to the 12 v on the factory stereo harness will there be a popping sound from the sub after turning off my car?

[@brandontran8638]

Would this also be the same as a 2021 civic?

[@Daniel-ft5lp]

After the install my screen on my 2020 civic si my screen isn't turning on. Any idea what that could be ?

[@chubbiet8989]

Hello, I have followed exactly as what you did and the only issue I am having is that I am getting no power to my amp. I tapped into the back 12V (or at least what I think is the 12V) but also my pins are a little different than yours and I am unable to find the pinout online anywhere.

[@ProvoBeastAudio]

Sounds like your line out converter isn't setup correctly. Alternatively, you can snag power and ground from the terminals of the amp for your loc.

[@chubbiet8989]

@@ProvoBeastAudio Do I connect the 12v wire directly to the power Input port on the amp?

[@chubbiet8989]

@@ProvoBeastAudio Ended up running a cable straight to the accessory wire in the back of the radio and got everything working.

[@hinz5555]

When taking 12V from that location we can’t get power to the amp but for some reason when we disconnect the remote wire and reconnect it the trunk latch releases. Any help?

[@brianbaltrusch9839]

Just happened to me

[@brianbaltrusch9839]

Okay so I found a solution. My problem was the trunk kept opening everytime I opened my driver door or locked my car. So I tapped into the same wire he did but that wire on my car is actually the trunk wire. So I had to disconnect the constant 12v and tomorrow I am running the constant 12 to the fuse box just to be sure. However this is going to be temporary because when the system was working the pac only has 55watts and my amp was basically at the lowest level it’s ever been so I’m getting an epicenter

[@jeremyfranklin278]

I have a 2019 civic lx I followed the steps in this video but I don’t seem to have the same color wires I the plug in the trunk to connect the LOC to a 12v constant. My amp has no power?! I’ve t -tapped multiple wires in the truck harness to find a 12v constant and I’ve got nothing….

[@danielgitlin2711]

Were you able to figure this out? I'm having the same problem in my '17 civic...

[@hstone0808]

If you boys have no power, did you run the power wire from the battery?

[@JustsomebodyWatchingurvids]

Why connect the yellow wire to a 12v constant? That would cause a parasitic drain when the cars ignition is off. I would connect it to an ignition source instead.

[@ProvoBeastAudio]

In standby, it pulls almost no amperage, and is meant to boot up an amplifier when there is the presence of either a DC offset or audio signal in an application where there may be a chime, or some sort of audio needed without the vehicle on. This is why it's meant to be connected to constant 12v. Read the instructions. Sure, that isn't necessarily needed for an amp / sub install, but this adapter is available for more applications than just that.

[@JustsomebodyWatchingurvids]

@@ProvoBeastAudio Ah, okay. I pulled up the manual online and I see it now. Thanks for taking the time to explain that and thanks for making the video. This is how I want to setup my sound system in my 2016 Civic.

[@anthonymunoz1868]

Do you have to tap in to both speakers in the rear for the LOC? I’m hooking up a 4 channel amp for highs and a mono amp for my sub

[@ProvoBeastAudio]

If doing that integrated of an install, you’ll want more than a simple line out converter to do it right. Send us a message on Facebook and we can point you in the right direction.

[@NuttyNate5280]

What fuse should I tap into? Auto trunk wire doesn’t work for 12V

[@thatslow4.6]

tap into your positive wire to your cig lighter

[@Jerinthekid]

I got the audio fixed but the trunk is still opening do you know what it could be. I did all the wiring like you said and I used the accessory Fuse for the converter

[@jammalphillips4665]

Did you ever figure the issue or how to stop the trunk from popping? Mine still does it and idk what to do other than run a wire to another accessory.

[@sivucit]

Hi, can you pls add a tool or let me know what tool you used to crimp 4 AWG wire ferruel. I do have one but it will do 18 to 5 AWG but not 4 AWG.. apprecaite your help

[@ProvoBeastAudio]

We didn't crimp our 4 gauge terminal, we allowed the terminal of the amplifier to do the crimping for us, and crimps and forms to the terminal itself for a super tight and clean connection.

[@JoonaBruh]

Not the newest video, so is it a problem if my box is 84 litres, but the subwoofer I'm getting is 41 litres?

[@tattoopunk75]

I have a 12” Kicker in my 2017 Civic. I’ve used dynamat on the trunk and trunk lid. I still get a rattle from the plastic on the back deck. Any suggestions on how to dampen that rattle?

[@orbeengamin5085]

flip sub facing the backseats and open the trunk pass through

[@ohihaha]

8:15 Do the rca cables connect to the sub section on the amplifier? (Appreciate your feedback)

[@yourlocaldump9413]

rca connects at the amp and headunit, he used the rca converter to turn the speaker wire into a rca signal to connect it to the amp

[@Midnightwolf114]

I bought a Kicker LOC and doesn’t have the yellow wire (12v constant power wire) . Does that mean it’ll turn on when speakers turn on & sends signal?

[@ProvoBeastAudio]

You bought a basic LOC, so all it will do is step down the high level speaker signal to a low level RCA output. It won't generate a remote turn on or anything like that.

[@ka.chaloir]

Nice video! So the LOC only turns on when input signal is present (when head unit turns on) and it will not drain the battery while it’s tapped into constant power?

[@ProvoBeastAudio]

Very low current draw, so shouldn't be an issue with any drains.

[@Jerinthekid]

I hooked it up like you said except I did the one left speaker and not both and I have two problems. One is that my truck keeps opening when I turn off the car and second when I go over a certain volume my audio gets staticy how do you fix these two otherwise everything else works

[@ProvoBeastAudio]

Sounds like a wiring issue to me. Hard to tell over a youtube comment. Maybe suggest taking it to your local audio shop for diagnosis!

[@jorgevillagomez3211]

Same here! Mine after my trunk opens my sub goes wild it just goes until I cut the power

[@diegomendez1826]

Couldn’t tell us what slot you used to tap into for the remote wire ?!

[@ProvoBeastAudio]

Because the Line Out Converter provides that turn on for us, no need to go to the fuse box at all with the right parts, Diego. Geez.

[@edgardomontanez7908]

If the 2020 Honda civic coupe already has a factory sub do I tap into the sub with the line out converter? Both the left and right?

[@MidevalGaming]

My sedan has a stock sub as well. I'm wondering if I'm suppose to just tap that like he said with the loc or still run off the left and rights like he did

[@crapin22]

that coat hanger trick did not work at all. been trying to do it for a solid a hour, and the wire just slides out of the tape

[@ProvoBeastAudio]

Bend the hanger at a tight 180 around the tape and wire to give more traction

[@bronsonclayton3731]

it's a skill lol

[@bsgerp9167]

Wrap the cable around the coat hanger a couple time and then tape. Or bent the end of the hanger backwards to grip better. Skill issue

[@hstone0808]

Try not to suck ...jeez

[@jesusloveyou9523]

video was a 10/10 all you had to do was just show us it flexing 🤷🏾‍♂️

[@ProvoBeastAudio]

It's a cheap Boss sub, don't expect much "flexing" with that brand.

[@arthurhughlett2292]

How thick is the abs your using?

[@pumaypucca]

⭐️⭐️⭐️⭐️⭐️great video 👍

[@kameronwilliams2238]

Would you be able to only tap into one of the two rear speakers?

[@ProvoBeastAudio]

In most circumstances, yes. Just be aware that if you have a song with lower frequencies specifically out of one speaker vs another, it may impact the performance of your new sub.

[@five40kix]

I'm about to do something similar to this. If you are taping into the rear speaker wires to goto your line output converter, you are not bypassing the factory amp correct? Is that an issue?

[@ProvoBeastAudio]

Hey there, our civic was not equipped with a factory amplifier. If you have the factory subwoofer, you will want to tap in at the sub, not the rear speakers. If you don't have a factory sub, then the rear speakers is your go to location.

[@stephanedoyon102]

@@ProvoBeastAudio i am going to do the same thing in my civic si with a factory sub so a got just 2 wire were a plug de other 2 wire

[@aerokid7940]

What is the preamp voltage from the speakers in order to adjust the gain correctly?

[@ProvoBeastAudio]

We set the gains with an SMD-DD1 which doesn't show voltage, sorry. The SMD-DD1+ does.

[@ericdolby1622]

What are your thoughts of mounting the amp in the trunk as well? Maybe upside down of the back deck

[@ProvoBeastAudio]

Most people argue mounting the amp inverted will not allow for proper cooling. Amp in the trunk generally is fine, just avoid areas where it can get hit. We choose under seat to keep it out of the way and protected.

[@ericdolby1622]

@@ProvoBeastAudio thank you!!

[@ericdolby1622]

Sorry one more question. In your description you have a suggested complete kit from skar. A single 12 inch enclosure with amp and all wiring. How do you like the sound from this kit in the trunk of a Civic.? I'm just looking for a good added punch for heavy metal kick drum and bass guitars.

[@superBEAST3333]

How did you find the 12V constant line in the trunk, my car doesn’t have that wire you tapped off of. It’s a 2016 Lx civic.

[@superBEAST3333]

@@ProvoBeastAudio?

[@KrisKasprzak]

any idea if the Civic has a remote power out on the head unit?

[@ProvoBeastAudio]

Nope, nor will it have rca outputs. You can attempt to find an accessory turn on wire in the radio, but this generation Civic runs also on a canbus system. Alternatively you can go to the fuse box.

[@chilitaco2719]

@@ProvoBeastAudioso I just installed my Triple 8inch Skar subs like you, but I have a static or rattling sound coming from the subs and it’s make my amp go into protection mode, any help?

[@ProvoBeastAudio]

@@chilitaco2719 Check your connections. Lots of variables, and without seeing it, knowing equipment, etc, hard to diagnose through youtube comments. Amps go into protection mode due to short circuits, poor wiring, improper impedance, etc. You could have your subs wired at a too low of an impedance causing the amp to shut down.

[@k2doves]

i installed this way and when i turned my car on it has the tpms light along with no traction control as well as the sub not workinh

[@ProvoBeastAudio]

Drive around the block, your system will need to reset!

[@Chjtterz]

THAT IS NOT A 12V IT OPENS MY TRUNK

[@tritongaming5715]

Please did you figure out where to wire the 12V?? You are 100% correct about it not being a 12v wire that he shows in the video, I have a 2016 honda civic and I did everything he did and now my trunk opens when I turn the car on or off and my reverse camera doesn't turn on, as well as the amp only has about 9V being ran to it wich isn't enough

[@Rugyyyy]

@@tritongaming5715LMAOO

[@egsamuel7454]

Gonna have to run it straight from the battery

[@Nacturnal702]

Yup. 2016 honda civic,,4 door sedan that beige wire ,messed up cannot open trunk,just clicks

[@bradleydaniels-rn5ip]

My trunk would open when I turn the car off, don’t tap into that wire for constant 12v

[@jorgevillagomez3211]

@@bradleydaniels-rn5ip what did you end up doing instead for that constant 12v ? Mine does the same thing …

[@liltyking25]

how would i use a LOC with a factory sub? It only has two inputs to tap into, positive and negative. not left + - and right + -

[@ProvoBeastAudio]

Double up both LOC positive wires (both solid white and gray), and both negative wires (both blacked stripped wires). Then connect those two sets to the factory sub's wiring.

[@liltyking25]

@@ProvoBeastAudio thank you so much!! I can’t wait to do an install in my civic. Great sound but lacking bass

[@MidevalGaming]

If tapping into the stock sub, im assuming that it will still work along side the aftermarket sub basically giving more bass?

[@liltyking25]

@@MidevalGaming correct, the factory sub is still completely functional. Tho, I would say I don’t notice it over my 2 12’ kickers

[@oskarjaw]

if i have a civic hatch with the subwoofer that it comes with, do i need to run a line output converter or can i just direct hardwire my amps line to the subwoofers line? thank you!

[@ProvoBeastAudio]

Line out converter at the factory sub wiring sub as the factory amp will have built in crossovers.

[@danielsong1323]

That constant wire makes my trunk switch on and off

[@ProvoBeastAudio]

Just snag constant 12v and ground from the amp terminals.

[@danielsong1323]

@@ProvoBeastAudio wym? I put my REM to my fuse under my dash (powers my radar and dash cam) now my sub “pops” or “thumps” after I turn my car off

[@YellowScubadiver]

I don't have the wire you tapped into in the trunk for 12V power! Weird, I have the other ones but just not the one you tapped. Do you by any chance know if it is different for Canadian civics?

[@ProvoBeastAudio]

Good question. Alternatively you can go to the fuse box, or simply tap into the positive post of the amplifier.

[@YellowScubadiver]

@@ProvoBeastAudio I ended up tapping into the speaker wire...not sure how recommended that is, but it works

[@chilitaco2719]

Which speaker wire did you tap into?

[@YellowScubadiver]

@@chilitaco2719 Rear speaker from the trunk.

[@nicholascruise7729]

​@YellowScubadiver is it still working?

[@kyleholmes___]

What color was ur 12v power wire

[@AX-qe5wk]

yellow

[@coryrodriguez7329]

What about automatic? 🤷🏾‍♂️

[@ProvoBeastAudio]

Not sure what you are asking?

[@bamcameback]

The grommet location and everything should be the same.

[@en3ultramega387]

You never run your RCA wires on the same side your running power wire

[@ProvoBeastAudio]

Tons of variables there. If you have good quality RCA cables, and a good ground, with modern electronics, you will no likely have any distortion, ground loop noise, etc in your audio. In the case of this video, perfect audio quality, no noise. As long as you correctly install your audio components, you don't necessarily need to separate your wiring, especially with a sub amp.

[@en3ultramega387]

@@ProvoBeastAudio but it’s just the best way to do it, when you have a crazy exotic system like with tweeters drivers and ect…

[@BassHead2020]

I’m not impressed wires are hidden that’s it. Ground is not a good legal safe ground. You have your power and speaker wires are going down the same side. Good practice m.