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About 2 weeks ago a bought myself a new JBL GT12.Im runing it on a Starsound Gladiator 2500w amp.Now the problem is when i pump the volume up it sounds ok from the inside ,But when you step out the car everything just vibrates and it sound like i just put a speaker in a tin can or something.Someone told me i should use something called dynamat,but it costs quite alot and i dont know if it will actually make a diff.
HELP PLEASE!!! Thanx
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AMD XP Athlon 2600+@3200 Radeon 9800 256mb 393/324 80GB Seagate 40GB Seagate 160GB 8mb Western Digital NF7-s
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