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Car Audio Equipment
Subwoofers
Sa12 replacement
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<blockquote data-quote="Jcsaudio" data-source="post: 8650344" data-attributes="member: 673752"><p>With my SA12, I found that a 24 db Linkwitz–Riley (L-R) filter gives me cleaner sounding bass than a Butterworth or similar filter. I get a little more kick with the Butterworth, but at the expense of allowing more distortion by. Same thing with my Sundown SD3 in my truck, although that subwoofer plays a little cleaner up higher. Anything above 75 Hz on my SA12 in its current box, and I notice distortion. I think the box construction, shape of the box, and box port tuning play a huge roll in this. The current box my SA12 is in now is an experimental box that could be built with a little more stiffening, and not have all equal parrelel sides. I do have a DSP and some head units have these LP filter options as well, so you need to experiment with those more and also look hard at that box. You will read about the most experienced people here say over and over, the box makes or breaks how good the bass sounds, irregardless of the subwoofer driver itself.</p><p></p><p>I found the same thing with my Alpine SWS subwoofer and box construction. It sounded meh, until I built a box that was solid and tuned right for that subwoofer. Now it sounds like it costs way more than I paid for it. Play with the phase relationship too, especially if your front stage has a lot of mid bass. If they are out of phase with each other than the bass will suffer greatly. Same thing goes for the phase for each speaker driver you use. Use AudioControl’s speaker pop app to diagnose this. Best tool I have found for me to quickly find out of phase drivers without having to remove them.</p></blockquote><p></p>
[QUOTE="Jcsaudio, post: 8650344, member: 673752"] With my SA12, I found that a 24 db Linkwitz–Riley (L-R) filter gives me cleaner sounding bass than a Butterworth or similar filter. I get a little more kick with the Butterworth, but at the expense of allowing more distortion by. Same thing with my Sundown SD3 in my truck, although that subwoofer plays a little cleaner up higher. Anything above 75 Hz on my SA12 in its current box, and I notice distortion. I think the box construction, shape of the box, and box port tuning play a huge roll in this. The current box my SA12 is in now is an experimental box that could be built with a little more stiffening, and not have all equal parrelel sides. I do have a DSP and some head units have these LP filter options as well, so you need to experiment with those more and also look hard at that box. You will read about the most experienced people here say over and over, the box makes or breaks how good the bass sounds, irregardless of the subwoofer driver itself. I found the same thing with my Alpine SWS subwoofer and box construction. It sounded meh, until I built a box that was solid and tuned right for that subwoofer. Now it sounds like it costs way more than I paid for it. Play with the phase relationship too, especially if your front stage has a lot of mid bass. If they are out of phase with each other than the bass will suffer greatly. Same thing goes for the phase for each speaker driver you use. Use AudioControl’s speaker pop app to diagnose this. Best tool I have found for me to quickly find out of phase drivers without having to remove them. [/QUOTE]
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