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Old 02-14-2017, 03:30 AM   #1
Dolgi81

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Sound deadening fibreglass sub box!!

Hi guys. I'm new to custom DIY car audio and was wondering if anyone can help me out. I'm going to be constructing a fibreglass sub box in my ute behind my seat. The box will be moulded onto metal and sit up hard against it when built. I was thinking of putting sound deadening between the box and the metal to stop vibration. Question is should I put the sound deadening on first and fibreglass mould over it or should I fibreglass first and sound deadening after? If I sound deaden first, will it pull off when I remove the mould? I was thinking to sound deadening first then mould so its a tight fit when I put the box in. I'm going to be using dynamat and have been told that its really sticky and shouldn't pull off. I'm going to be using painters tape to stick the fibreglass onto, will the tape pull the sound deadening of when I remove the mould? Thanks in advance for any advice!
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Old 02-14-2017, 05:49 AM   #2
Jimi77

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Quote:
Originally Posted by Dolgi81 View Post
Hi guys. I'm new to custom DIY car audio and was wondering if anyone can help me out. I'm going to be constructing a fibreglass sub box in my ute behind my seat. The box will be moulded onto metal and sit up hard against it when built. I was thinking of putting sound deadening between the box and the metal to stop vibration. Question is should I put the sound deadening on first and fibreglass mould over it or should I fibreglass first and sound deadening after? If I sound deaden first, will it pull off when I remove the mould? I was thinking to sound deadening first then mould so its a tight fit when I put the box in. I'm going to be using dynamat and have been told that its really sticky and shouldn't pull off. I'm going to be using painters tape to stick the fibreglass onto, will the tape pull the sound deadening of when I remove the mould? Thanks in advance for any advice!
Your plan should work just fine. You'll also want to deaden the fiberglass itself. You can use modeling clay to deaden the fiberglass.

Good luck with the project.
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Old 03-30-2017, 11:40 PM   #3
SPL_Krayzie112

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Dynamat or b-quiet should do the job.
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