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<blockquote data-quote="Lightninghoof" data-source="post: 2993362" data-attributes="member: 569919">Wow, I&#039;m sorry to hear that.Your new 15&quot; Type-R woofers should absolutely slaughter the old 10&quot; Type-E woofers in terms of sheer output and SPL efficiency.Something is seriously wrong somewhere along the line.&nbsp; The problem is, there are so many possibilities as to what that problem may be.It could be something as simple as incorrectly configured HU settings.The amplifier gain, xover, EQ settings could be misconfigured.The subwoofers could be wired incorrectly or out of phase.You could be experiencing significant cancellation.I am hesitant to say it may be a incorrectly designed ported enclosure, because even a poorly designed ported box can still be loud as hell as far as sheer output goes.&nbsp; Even if it were too small, tuned too high, or not using nearly enough cross-sectional port area.If it is indeed due to poor vehicle transfer function (cabin gain), perhaps the shop could modify the trunk or rear deck somehow to allow more sound into the cabin.You need to take the vehicle back to an authorized professional and have them troubleshoot this issue.</blockquote>

[QUOTE="Lightninghoof, post: 2993362, member: 569919"] Wow, I'm sorry to hear that. Your new 15" Type-R woofers should absolutely slaughter the old 10" Type-E woofers in terms of sheer output and SPL efficiency. Something is seriously wrong somewhere along the line. The problem is, there are so many possibilities as to what that problem may be. It could be something as simple as incorrectly configured HU settings. The amplifier gain, xover, EQ settings could be misconfigured. The subwoofers could be wired incorrectly or out of phase. You could be experiencing significant cancellation. I am hesitant to say it may be a incorrectly designed ported enclosure, because even a poorly designed ported box can still be loud as hell as far as sheer output goes. Even if it were too small, tuned too high, or not using nearly enough cross-sectional port area. If it is indeed due to poor vehicle transfer function (cabin gain), perhaps the shop could modify the trunk or rear deck somehow to allow more sound into the cabin. You need to take the vehicle back to an authorized professional and have them troubleshoot this issue. [/QUOTE]

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