Building a custom fiberglass subwoofer enclosure for an Infiniti Q50 (part 4)

This is the final video in the series for the custom fiberglass enclosure build. If anyone has any questions feel free to ask and I will do my best to answer immediately!!
The sound test can be found at the end of the video below:
2014 Infiniti Q50 - Modification List 2020
• Infiniti Q50 full cosm...
A video detailing the threaded inserts.
• Mounting subwoofers li...
Check out my amazon store for the various items I used in this video and in my other projects. As an affiliate, I earn a small proceed from anything purchased at no extra cost to you.
www.amazon.com...
Additionally, if you want to support the channel, check out the merch on my store tab that's available for purchase which would be super helpful as well!!

[@JamesDang2]

Turned out REAL NICE!

[@Foxcraze]

Twinz Turbo appreciate it thanks!

[@ronjlwhite8058]

Hell yeah...Mark @ CAF is the actual man behind my build. Learned everything im doin thanks to Marks vids.

[@Foxcraze]

I have watched his stuff too! I just don’t have the wood working tools I need just yet. But I’m hoping to get there one day.

[@ronjlwhite8058]

@@Foxcraze my shop area is on the gram. Got some Mobile Solutions goodies too via Marks vids.

[@clcoghlan]

It definitely inspired me. Thanks man.

[@Foxcraze]

Glad to hear it!! If you take on a similar project be sure to share it with me on Instagram!

[@helmuttun]

You're an artist. Well done

[@Foxcraze]

helmuttun wow, thanks it means a lot!!

[@jaxsegal5715]

Great job!

[@Foxcraze]

Appreciate it bro!

[@patsjoholm]

It's nice to see I'm not the only one that wants this style box. I built the same one for my old Maxima, which I no longer have. I'm most likely going to wait until summer time to build this. Sucks not having a garage... I love how meticulous you are. If you're going to do something, do it right, right? I would have tossed in some poly-fil into the box as well. But, I'm sure it sounds sweet just the way it is!

[@Foxcraze]

Patrick S I appreciate the positive feedback. I have also been tossing around the idea of adding poly fill I bought some just haven’t taken the box out to do it yet. But yeah I don’t like doing things more than once so the extra effort is worth it to me to ensure that doesn’t happen. I have plenty of stuff to come so stay tuned!

[@AnthonyJ350]

Looks good in there!

[@Foxcraze]

Thank you! For it being my first attempt, I liked how it turned out.

[@bottomofthemap696]

Came out really great! I had severe doubts about the first and the second part still not being over. But you did a good job and it looks professional

[@Foxcraze]

Appreciate it! I had to do it that way due to how much time there was between recording days. I wanted to get it all out faster but my work schedule just wasn’t allowing it so I broke it up.

[@linesanraman7974]

This is one of the cleanest examples of this type of enclosure that I've seen, and I've watched A LOT of these videos. Your prep work and attention to detail really paid off. Nicely done 👌🏼 How is the sound quality compared to the Kicker setup that you replaced?

[@Foxcraze]

I really appreciate that! When there isn’t a hole in the surround it’s like night and day comparing the two. I love the setup but need to replace the sub due to the hole that got poked through it with groceries lol

[@ericgraham4215]

I couldnt tell how mich space was there between the wall.of the box and the sdriver magnet? I thinknit needs what? 2 or 3 inches from the back wall

[@Foxcraze]

@ericgraham4215 yeah it was around 2.5” which was just enough to get the magnet port airflow.

[@didisaythat8085]

been a decent series, thanks!

[@Foxcraze]

Did I say that? Thank you, its appreciated. Im working to improve the filming and editing with each upload.

[@anthonyraines5951]

Damn fine build! I know this is an older video but I am just now about to start my first. Lots of knowledge and skill in your videos thanks brother for the step by step breakdown

[@Foxcraze]

No problem! It’s literally what I’m here for my man! Have a great day and enjoy your build!!

[@solicitutoob]

That looks awesome! Thanks for the videos on your sub woofer box build!

[@Foxcraze]

Appreciate it! Be sure to subscribe for more projects in the future.

[@solicitutoob]

Absolutely subscribed.

[@Foxcraze]

Appreciate you!!!

[@sean8865]

Nicely done. Great series of videos.

[@Foxcraze]

I appreciate it man, thanks for watching!

[@march3615]

You really hit it good , one of the best DIY i've seen so far.... only one thing, why not use a good connector in the box? That would've looked so much better.

[@Foxcraze]

I thought about it but I didn’t really have any place flat enough on the back to mount a terminal box and not take the chance of it leaking. I can always fix that later down the road also if i want plus for me it is also an out of sight out of mind kinda deal.

[@WhiteLionFR]

Thx for these Videos. can you tell us something about the costs an time it needed?

[@Foxcraze]

In all, the materials minus the tools if you already have them cost me about $120.00. I bought harbor freight tools which were about $80 dollars extra. audio equipment was separate all together and will vary based on what you plan on running. If I had not taken the time to film, edit and all that stuff I could have knocked this box out in a long weekend. For this specific one it took me about 3 weeks of working on it when time was permitted.

[@mortenandreengmann]

A nice box bulid ✌🚘

[@Foxcraze]

Thank You, I appreciate that!

[@westtexascowboy5473]

That is one hell of a build. I would of lost my patience half way through!

[@Foxcraze]

Appreciate the positivity! I’m gonna redo it one day and make it better based off what I learned from this one.

[@johnrountree9114]

Great Video I am gonna used this vid when I do one for my Passat

[@Foxcraze]

Glad to help, I will be doing a lot of fiberglass and abs plastic content in the future. Be sure to subscribe so you don’t miss out!!

[@garykreutzer1239]

Great vid man. I have 2 questions though. Why the Rondo not regular Bondo and couldn't you completely finish the first half including the sound deadening before you built the other side? I try to limit my contortions to a bare minimum at my age.

[@Foxcraze]

Thank you! Now to answer your questions; I used rondo over just bondo because I wanted the final layer of filler to go on smooth, self level with minimal effort (which made my sanding process much easier) and lastly provide better adhesion to the previous fiberglass and resin coats already applied. As for the sound deadener I didn’t apply it earlier on because I wasn’t sure if I would need to add any additional layers of chop mat to the inside for more strength and support once the sub was mounted. This was my first time building one of these so I def learned during this process as well.

[@daredevil500000]

Clean work

[@Foxcraze]

Thank you, I appreciate it. I will have more fiberglass projects coming later this season, so stay tuned!

[@richardgomez8010]

Came out fantastic! Do you remember how much you spend in materials

[@Foxcraze]

With tools I didn’t have any everything it was like $150 give or take and I had a lot of stuff left over to use later.

[@CrystalClearSQL]

Very Very cool. Well done. Wish i could have heard it. Looks great though 👍

[@Foxcraze]

Appreciate it! Still doing the same setup as of today, and it’s still going strong!

[@MichaelJohnson-je2vo]

All that and you gave no input on how it sounded even though I'm sure it sounds great and this was such a good video I'm no longer afraid to do my own

[@Foxcraze]

I tried to record the sound but it just didn’t pick it up well. It sounds really good in my opinion and am very happy with it these years later. My 2020 closeout video has a sound demo at the end of it and even with a tear in the surround in the sub during that video it still performed well.

[@fabiangoolsarran3492]

Wow! This was an amazing tutorial, definitely something I’d consider doing in the future. Quick question, do you think creating an enclosure for a 12 inch subwoofer would be doable?

[@Foxcraze]

Yeah it’s no different, you will just need to consider the Airspace for a sealed setup and adjust accordingly.

[@millyActual]

Sweet work. How did you secure it to the car all said and done?

[@Foxcraze]

Bradley Milburn since its a mold its a tight fit in the pocket. The wood floor install helps press into the channel I made underneath the front of the box to hold it from sliding around.

[@ghostrunner32]

You could also add velcro strips to the bottom if you're still worried about it shifting. Might make it a little difficult to put in and take out if needed though.

[@MostlyHealthyFoodReviews]

Looks awesome! I wish I had the time and talent to build one for for my 2015 Q50. Any suggestions on where to find them for us less than saavy owners?

[@Foxcraze]

At this current time, I have not been able to find any pre constructed boxes from any of the major brands that are setup for our car. Any good stereo shop in your area should be able to make you one, but expect to pay anywhere from $250-$400 for it.

[@Thewolverine691]

looks good man 10/10 final finish, but one question. how did you mount it to the car ?

[@Foxcraze]

Funny you ask, it’s not mounted at all. The constraints were so tight that it literally holds itself in and doesn’t move. As an extra measure I installed a wood floor that is cut and butts up against the wood bottom of the enclosure. I truly appreciate the positive responses!

[@ronjlwhite8058]

Sweet job bro!!!

[@AlanGonzalez-om4rr]

Supposedly you need to press that sound deadening material until it stays completely flat without any pattern to archieve the maximum efficiency (that's what I've read)

[@Foxcraze]

Alan Gonzalez that’s damn good to know!! I just checked their website and your right I have some corrections to make. I appreciate the looking out.

[@jaime13huerta]

Great fucken job dude looks nice

[@Foxcraze]

Thanks a lot, i'm glad the work is appreciated!!

[@Llegando_Tarde]

Good job

[@Foxcraze]

Thank you!!

[@stevenbarnett1015]

How much for the materials? Looks awesome

[@Foxcraze]

Well at the time it was built I spent around $150 for the materials used. With todays inflation, I’m not sure what it would cost currently.

[@suttonlyfamous]

How do you wire the quick disconnect?

[@Foxcraze]

You can either use Butt connectors or soldering to attach the neg and pos wires from the sub to one end and then do the same to the pos and neg channel leads coming from the amp

[@babyhuwe05]

Good job bro .... I cant believe u didnt spray paint the back black u are OCD how i know im the same way wen it comes to building or creating something looks dope tho im about to build me a fiberglass sub box for my foxbody mustang

[@Foxcraze]

Best believe I considered painting it. Only reason I didn’t was because of the temperature and I didn’t want to have to sand it down when the paint ran cause I knew it was going to lol. I’m gonna make a new one for a 12 next fall.

[@Lmedrano88]

Question for you, why did you bother sanding it so much if you were going to wrap it? Im making mine carpeted, you think ill need to sand it that much? How much fiberglass mat did you use? Thanks a lot, great series you made!

[@Foxcraze]

With carpeting, sanding won’t be needed quite as much cause carpet hides a lot of cosmetic flaws. Vinyl and leather on the other hand show flaws through the material so if it isn’t smooth you will see all the imperfections.

[@Foxcraze]

I don’t recall the exact SQFt but I went through 2 packages of it from walmart plus what I still had in my possession before hand. Focus less on SQFt of Mat and more on the amount of layers you lay down. A good 4 layers should be strong enough to get the job done.

[@Lmedrano88]

@@Foxcraze Awesome. I appreciate it.

[@Foxcraze]

No problem, glad to help out!!

[@shawnstrachanjr6898]

How much to bill one for a size 15

[@Foxcraze]

Material costs should be about the same for what I spent to build this one which was around $150. I detailed the pricing in the actual video series.

[@cornelionutmicu3640]

Hey @Foxcraze what tipe of resin did you use the epoxy resin or another kind?

[@Foxcraze]

My enclosure was built using all polyester based resin. You can use either or but polyester is cheaper and more used with fiberglass enclosures that I have seen. I didn’t need the extra advantages that come with epoxy resin like clarity, moisture resistance to name a few. Check with the material your using to know what resin to buy to be safe for your project.

[@adrianstypulkowski4266]

Is that a 10 inch sub or 12? I wanna put in a 12 but once I build the enclosure box inside the car it will be to big and not a lot of room

[@Foxcraze]

That is the 10” but it does more than I need it to!

[@adrianstypulkowski4266]

@@Foxcraze could I get some clips of how it sounds? You think if I do a 12inch and same diy box it should fit in right cause it looks like there not alot of room left to put an bigger one in

[@Foxcraze]

I will see about getting a recording sometime today or tomorrow, message me on Instagram.

[@amanteapasionado6836]

Why didn't you just close the garage door and turn a heater on in there to get the glue to work?

[@Foxcraze]

The apartment complex I was living in had a rule against portable heaters being used in the units. I was informed when the breaker was tripped from using one and they had to come reset it since the box was in a different unit.

[@rudizcastillo9451]

Where u buy the cover for the box can u put the link bro

[@Foxcraze]

So it came from either Joanns fabric or Walmart but it’s a faux leather material kinda like what I linked below. It has no backing and has a little bit of stretch. www.walmart.com/ip/ANMINY-Vinyl-Faux-Leather-Fabric-Pleather-Upholstery-54-Wide-By-the-Yard-Multiple-Colors/115416382?variantFieldId=actual_color

[@user-nc8se9in8o]

No need for a port?

[@Foxcraze]

If the sub is designed to function in a sealed enclosure then nope no need for a port.

[@user-nc8se9in8o]

@@Foxcraze thanks, I didn’t consider that. Looking into building custom boxes for my Tahoe. I guess I should start by selecting the the subs then go from there…

[@Foxcraze]

That’s a solid plan for sure!

[@joshadolphsen4767]

Bro you did an amazing job. I will be copying this in my Q50. Are you close to Garner?

[@Foxcraze]

Appreciate it man! And I honestly have no idea lol I am in Fayetteville if that helps!

[@joshadolphsen4767]

@@Foxcraze garner is on I-40 about an hour away. Basically Raleigh. Would love to see your setup

[@Foxcraze]

That’s would be cool man! Maybe we can work something out !

[@joaoguimaraes31]

How did you fix the box to the trunk so it would not move?

[@Foxcraze]

The box is a very snug fit plus, I made the channel on the bottom face of the enclosure deep enough for the flooring to slip into and hold in into place as well.

[@joaoguimaraes31]

@@Foxcraze thanks, I am building my first subwoofer fiberglass box. Hope It Will be great as your's.

[@Foxcraze]

Just take your time and don’t rush the steps and you will be just fine!

[@jayjay7160]

No demo?

[@Foxcraze]

Demo of its function? Sub functionality usually doesn’t relay well over a phone which is what this video was recorded with and is why I didn’t do one at the time. That said the box is still in the car same setup and still running well!

[@lucsmith3953]

How much did the fiberglass box cost to make?

[@Foxcraze]

In total including tools I had to buy, it was about $150.00. Way less that I would have paid to have someone else build it plus I added to my tool inventory at the same time.

[@lucsmith3953]

Thanks, I’m thinking of doing this for my Q60 on each side.

[@angelsnavely1775]

How much in total did this project cost?

[@Foxcraze]

Between $150-$175ish with buying the tools I didn’t have and all.

[@angelsnavely1775]

@@Foxcraze that super good, I'm glad I saw your vid, it came out real nice!

[@Foxcraze]

I appreciate it!

[@co.2strokes200]

Sound test?

[@Foxcraze]

Sub functionality usually doesn’t relay well over a phone which is what this video was recorded with and is why I didn’t do one at the time. That said the box is still in the car same setup and still running well! I’m going to be doing an update video of the car at its current state and can include that then.

[@co.2strokes200]

@@Foxcraze oh ok for sure ! By the way it came out looking bad ass I’m going to attempt making one for my car

[@Foxcraze]

Do it! I was skeptical at first but after getting the back mold made I realized how easy it was!

[@Keeping-It-Real-55]

Man that is a great job. Too much work though. Wish you spent some time bumping it for us though. Nice build but no sound clips or 1-2 minute music demo.

[@Foxcraze]

Appreciate it! Sub functionality usually doesn’t relay well over a phone which is what this video was recorded with. The sub was also under powered with the amp I was running and replaced shortly after the video published. That was really why I didn’t do one at the time. That said the box is still in the car same setup and still running well. Maybe I will do a year update video on it and do the demo then!

[@Keeping-It-Real-55]

@@Foxcraze That sounds like a good idea.... Year after update

[@thaivue2644]

How did you lock the box in place so it doesn’t move

[@Foxcraze]

Good question, between the tight mold and the laminate flooring assembled to press against it; it doesn’t move an inch.

[@dannychenhoykong3412]

No need make a hole for the wave out?😅😅

[@Foxcraze]

danny chen hoy kong no it doesn’t need to be ported. I am using a small area and it is built to the air space needed to function sealed.

[@jnapier1626]

Why are you putting dynamat in the speaker box???? That’s a waste.

[@Foxcraze]

I read on several forums that with a fiber glass enclosure it helps at absorbing some of the rebound sound waves playing against the box back at the sub. It's the main reason I did it. I have also read it seems to have a cleaner deeper sound. The mat wasn’t costly so I gave it a go.

[@crytechxld]

Great videos but you didn’t even do a test bump 😭😭😭😭😭

[@Foxcraze]

I appreciate it and yeah I know..Sub functionality usually doesn’t relay well over a phone which is what this video was recorded with and is why I didn’t do one at the time. That said the box is still in the car same setup and still running well! I’m going to be doing an update video of the car at its current state and can include that then.

[@crytechxld]

@@Foxcraze Awesome! Also your video inspired me to make my own box and currently laid my resin down and putting fiberglass on it for strength now also got a skar 10 inch SVR cause of these recent Black Friday deals can’t wait to have it all hooked up

[@Foxcraze]

Awesome add me on Instagram so I can see the result when your finished!! www.Instagram.com/_foxcraze

[@nickk3421]

Nice Job, but buy yourself a router...LOL

[@Foxcraze]

Working on it! Believe me, I was struggling in this one haha

[@chapmanmerchant]

Can you make one and send it to me. No I’m serious

[@Foxcraze]

I won’t be producing these