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Focal VS AudioFrog!?
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<blockquote data-quote="Rouleur" data-source="post: 8747177" data-attributes="member: 683108"><p>A couple of things that may be very helpful:</p><p></p><p>Since you mentioned you're installing into a GTI, a few of my own(MK4 VR6) discoveries may help you. </p><p></p><p>1 - The "A-Pillars" are resonating most of the engine noise you hear in the cabin. I filled the space between the facia and the structure with left-over Thermotec™ Thermo-Guard, and also surrounded each contact point/clips with little Dynamat scraps to isolate any physical vibrations. </p><p>I went for a drive down my test circuit. It sounded like my ears had been boxed. I could barely hear the motor. What I did hear instead was the exhaust note. The acoustic upgrade was pretty massive; a very clear sound stage.</p><p></p><p>2 - I should also note that I had previously stuffed about 4 inches of high density open and closed cell foam into the stickshift cavity, topped with a layer of dynamat. This cut out all the road noise coming up through and around the shifter(i.e.: "hole in the middle of your car". </p><p></p><p>These two improvements will kill 98.5% of the sonic and physical vibrations coming from the engine bay.</p><p>(I did the same on the B and C Pillars and the sills, but it wasn't until I treated the A pillars that the cabin suddenly became very quiet.) Now I hear all those subtle little things like fingers sliding up the frets on guitars, and the "air" between the instruments, details that had been drowned out by motor noise previously. The MK4 12v VR6 exhaust note is very musical too(think "Chewbacca"), and now it sounds even better since the motor noise upfront has been attenuated. </p><p></p><p>Treating your environment takes time, but once done, It will pay huge dividends. I also isolated my subwoofer in the trunk using Isolate-It! sorbothane bumpers and strapped it solidly to the side of the trunk using threaded inserts and tie-down straps. The Focals in the doors are isolated and the door skin behind the woofers is treated to deflect backwaves laterally into the door cavity, which is selectively dampened and sealed. I originally had entry level Focal 165's before upgrading and while the ES165K's are definitively an upgrade, it wasn't huge(non-audiophiles couldn't tell). </p><p>Most of the acoustic improvements came from the original structural work. </p><p></p><p>*Get a plastic lever kit for removing your interior bits. This will save you grief. Also good to get extra plastic clips from VW for the inevitable breakage.</p></blockquote><p></p>
[QUOTE="Rouleur, post: 8747177, member: 683108"] A couple of things that may be very helpful: Since you mentioned you're installing into a GTI, a few of my own(MK4 VR6) discoveries may help you. 1 - The "A-Pillars" are resonating most of the engine noise you hear in the cabin. I filled the space between the facia and the structure with left-over Thermotec™ Thermo-Guard, and also surrounded each contact point/clips with little Dynamat scraps to isolate any physical vibrations. I went for a drive down my test circuit. It sounded like my ears had been boxed. I could barely hear the motor. What I did hear instead was the exhaust note. The acoustic upgrade was pretty massive; a very clear sound stage. 2 - I should also note that I had previously stuffed about 4 inches of high density open and closed cell foam into the stickshift cavity, topped with a layer of dynamat. This cut out all the road noise coming up through and around the shifter(i.e.: "hole in the middle of your car". These two improvements will kill 98.5% of the sonic and physical vibrations coming from the engine bay. (I did the same on the B and C Pillars and the sills, but it wasn't until I treated the A pillars that the cabin suddenly became very quiet.) Now I hear all those subtle little things like fingers sliding up the frets on guitars, and the "air" between the instruments, details that had been drowned out by motor noise previously. The MK4 12v VR6 exhaust note is very musical too(think "Chewbacca"), and now it sounds even better since the motor noise upfront has been attenuated. Treating your environment takes time, but once done, It will pay huge dividends. I also isolated my subwoofer in the trunk using Isolate-It! sorbothane bumpers and strapped it solidly to the side of the trunk using threaded inserts and tie-down straps. The Focals in the doors are isolated and the door skin behind the woofers is treated to deflect backwaves laterally into the door cavity, which is selectively dampened and sealed. I originally had entry level Focal 165's before upgrading and while the ES165K's are definitively an upgrade, it wasn't huge(non-audiophiles couldn't tell). Most of the acoustic improvements came from the original structural work. *Get a plastic lever kit for removing your interior bits. This will save you grief. Also good to get extra plastic clips from VW for the inevitable breakage. [/QUOTE]
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