QUOTE(SportyHandling @ Aug 8 2013, 07:24 PM)
No problem. I am not denying that soundproofing won't improve the sound effect of an audio system. I am suggesting that the effects may not be as significant or appreciable as one might have expected. FWIW I am not only referring to soundproofing but the upgrade of the speakers too. I upgraded the original stock front speakers to an aftermarket one, and the difference is marginal. The soundproofing did improve the sound quality to a certain extent, mainly in smoother bass response, but the differences to my ears are marginal. The primary purpose of the soundproofing, to me, is to improve the quietness levels of the cabin first and foremost. Improvement of audio quality with soundproofing is of secondary importance. In my case, the soundproofing to the four door panels brought negligible impact to my vehicle, the Nissan Sylphy. Another Sylphy owner also felt the same when he tried the same soundproofing material from the same shop on his car. Perhaps the Sylphy is already quiet in the first place, so the soundproofing exercise did not bring any tangible or appreciable results. With the Preve Turbo the differences may be more perceptible.
One thing that is for sure - I will not be soundproofing the Preve Turbo. On the other hand, I hope the sound of the Turbo engine and CVT will be slightly softer after the 1st 1000km service. Even if it doesn't, I would still live with it for at least 5 years.
Cheers.
On the audio part, tell me what you have upgraded to.
The stock speaker worth RM15 each, so I want to know what have you upgraded to as a comparison.
Bad soundproofing will make the sound even worse.
Preve floor carpet is thin to begin with, so floor panel soundproof will eliminate road noise for sure, also water splashing noise when tyre go over it.
I have a friend who upgraded his stock speaker to a budget 2way component speaker around RM400 and 2nd hand amp, the sound is just better for sure. I had mine upgraded to active setup and I feel the huge different before and after STP soundproof material being done on the front doors.
So if soundproof works? I do think it will, but it have to be done in the correct way. Not all people know how to do it properly.