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Car Audio Equipment
Subwoofers
What causes the "fluttering" noise in subwoofers and how do I prevent it?
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<blockquote data-quote="SweetNZesty" data-source="post: 8803990" data-attributes="member: 686315"><p>I'm new to car audio.</p><p></p><p>At lower volumes, my system's bass is very smooth, but at higher volumes it kind of sounds like trilling or rolling r's with your tongue - a rapid, fluttering mechanical noise. It doesn't sound good</p><p></p><p>I noticed this with my Rockford Punch P3s, which I returned because I thought maybe they weren't high enough quality subs and perhaps there was also port chuffing.</p><p></p><p>Now, I have two new Adire Brahma 12" subs in a sealed box (2.5 ft cubed, minus the volume occupied by the subs) powered by a Sundown SIA 2500W amplifier. I'm running them with a stock battery and alternator so I'd assume that they are underpowered.</p><p></p><p>The amp comes with a light that flashes when clipping is occurring, but the fluttering noise occurs before the amp indicates clipping. However, my lights also dim before the clipping light flashes, so I wonder if there may be clipping anyway.</p><p></p><p>I also wonder if the subs could be bottoming out, but these seems unlikely as they are 1000W RMS each and I doubt my car is really putting out that much power.</p><p></p><p>Or maybe this is just how even high-quality subwoofers sound and I have unrealistic expectations.</p><p></p><p>So, what causes the fluttering noise and how can I prevent it at high volumes? Would a 250 amp alternator fix my issues, or is something else going on?</p></blockquote><p></p>
[QUOTE="SweetNZesty, post: 8803990, member: 686315"] I'm new to car audio. At lower volumes, my system's bass is very smooth, but at higher volumes it kind of sounds like trilling or rolling r's with your tongue - a rapid, fluttering mechanical noise. It doesn't sound good I noticed this with my Rockford Punch P3s, which I returned because I thought maybe they weren't high enough quality subs and perhaps there was also port chuffing. Now, I have two new Adire Brahma 12" subs in a sealed box (2.5 ft cubed, minus the volume occupied by the subs) powered by a Sundown SIA 2500W amplifier. I'm running them with a stock battery and alternator so I'd assume that they are underpowered. The amp comes with a light that flashes when clipping is occurring, but the fluttering noise occurs before the amp indicates clipping. However, my lights also dim before the clipping light flashes, so I wonder if there may be clipping anyway. I also wonder if the subs could be bottoming out, but these seems unlikely as they are 1000W RMS each and I doubt my car is really putting out that much power. Or maybe this is just how even high-quality subwoofers sound and I have unrealistic expectations. So, what causes the fluttering noise and how can I prevent it at high volumes? Would a 250 amp alternator fix my issues, or is something else going on? [/QUOTE]
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What causes the "fluttering" noise in subwoofers and how do I prevent it?
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