DIY: How to Make a Sealed Subwoofer Box [COMPLETE STEP BY STEP]

Опубликовано: 17 Июль 2026
на канале: Canal Bob Review
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4.2k

Unhappy with the bass from the original plastic box [00:00:20]? In this DIY project, I show you step-by-step how to build a sealed MDF speaker box for your car subwoofer, aiming for much higher quality!

🔥Links mentioned in the video:

➡️https://bobreview.com.br/posts/caixa-...

I start by showing the project in 3D [00:00:39] and the measurements for the cuts [00:00:57]. I explain the importance of calculating the correct internal volume (following the sub's manual, 12 liters [00:02:08]) for optimal performance.

Then, it's time to get to work: I cut the MDF [00:06:34], assemble the structure with glue and screws [00:07:01], sand it [00:07:15] and, most importantly, ensure complete sealing using putty [00:08:03] and then hot glue inside [00:19:12].

I solder a thicker wire to the speaker [00:14:15]. For the finishing touch, since the MDF wasn't perfect, I opted to cover it with fabric [00:12:35], applying it with glue [00:16:22] and making the cutout for the subwoofer [00:18:44].

Finally, I'll show the installation in the trunk with brackets and Velcro [00:20:10], compare the sound BEFORE and AFTER [00:22:34], and present the total cost of the project [00:23:14].

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*VIDEO CHAPTERS:*
00:00 Introduction: DIY Sealed Subwoofer Box Project
00:20 The Problem: Plastic Box with Poor Bass
00:39 Planning: 3D Model and Cutting Measurements [00:00:57]
02:08 Essential Calculation: Internal Box Volume (12 Liters)
06:34 Hands-on: Cutting the MDF Pieces
07:01 Assembling the Structure (Glue and Screws)
08:03 PERFECT SEAL: Wood Filler [and Hot Glue 00:19:12]
12:35 Finishing: Decision to Line with Fabric [00:16:22]
14:15 Upgrade: Soldering Thicker Wire to the Subwoofer
18:44 Finishing the Lining and Cutting
20:10 Car Installation: Firm and Secure Fixing
22:34 SOUND TEST: Before vs. After the New Box!

23:14 Total Cost of the DIY Project

*So, did you like the project? Have you ever made your own speaker box?*

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#DIY #CarAudio #Subwoofer #SpeakerBox #DoItYourself #MDF

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