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<blockquote data-quote="sjv13" data-source="post: 8027640" data-attributes="member: 632245">There is no such thing as a &quot;Type-D.&quot; The &quot;SWR&quot; means &quot;SubWoofer R&quot; (as in Type-R). The &quot;12&quot; in &quot;1221-d&quot; means 12 inches. The second &quot;2&quot; in 1221-d means 2 ohms. The second &quot;1&quot; in 1221-d means 1st generation. The &quot;d&quot; in 1221-d means dual voice coil. Hope this helps.I have an swr-1243d (so that means type-r, 12 inches, 4 ohms, 3rd generation, dvc). I have it on an Alpine MRX-M50 giving it 500 cleans watts at 2 ohms. I have the feeling I might be working the amp a little too hard though. I have a 4v preout deck and my gain is over half way up. And then on the deck I have subwoofer level at +3 on a scale of -25 up to +6. No loudness, no EQing below 80hz, no bass boost. Anyways, moral of the story is... on some super bassy songs if I turn it up a little louder (say to 54 or 55) than what I set my gain at (50/62) then the amp shuts off. I would expect that to happen though, seeing as I&amp;#39;m pushing it so hard. Oh well. My type R does pound ALMOST enough to my liking an does a fine job for me 95% of the time.I have a feeling that maybe the 1st generation of Type-R which you have may be rated for less (300rms) than what most people realize. Or Alpine just underrated it and then put it at what it&amp;#39;s rating is actually closer to for the generations after it. But I really dont know that for sure, and I&amp;#39;m just spit ballin here. Quick question for [USER=545080]@audiobahn[/USER];I know the Type-R is an SPL oriented sub, but sadly it&amp;#39;s the only car sub I have heard (my friend has two on 550rms a piece though). Would a more SQ oriented sub PUNCH harder, or is that all just a matter of the box? I know that an SQ sub will be &quot;more accurate&quot; and &quot;closer to what the artist intended&quot; but what does that really mean for me? Thanks for any help.</blockquote>

[QUOTE="sjv13, post: 8027640, member: 632245"] There is no such thing as a "Type-D." The "SWR" means "SubWoofer R" (as in Type-R). The "12" in "1221-d" means 12 inches. The second "2" in 1221-d means 2 ohms. The second "1" in 1221-d means 1st generation. The "d" in 1221-d means dual voice coil. Hope this helps. I have an swr-1243d (so that means type-r, 12 inches, 4 ohms, 3rd generation, dvc). I have it on an Alpine MRX-M50 giving it 500 cleans watts at 2 ohms. I have the feeling I might be working the amp a little too hard though. I have a 4v preout deck and my gain is over half way up. And then on the deck I have subwoofer level at +3 on a scale of -25 up to +6. No loudness, no EQing below 80hz, no bass boost. Anyways, moral of the story is... on some super bassy songs if I turn it up a little louder (say to 54 or 55) than what I set my gain at (50/62) then the amp shuts off. I would expect that to happen though, seeing as I'm pushing it so hard. Oh well. My type R does pound ALMOST enough to my liking an does a fine job for me 95% of the time. I have a feeling that maybe the 1st generation of Type-R which you have may be rated for less (300rms) than what most people realize. Or Alpine just underrated it and then put it at what it's rating is actually closer to for the generations after it. But I really dont know that for sure, and I'm just spit ballin here. Quick question for [USER=545080]@audiobahn[/USER]; I know the Type-R is an SPL oriented sub, but sadly it's the only car sub I have heard (my friend has two on 550rms a piece though). Would a more SQ oriented sub PUNCH harder, or is that all just a matter of the box? I know that an SQ sub will be "more accurate" and "closer to what the artist intended" but what does that really mean for me? Thanks for any help. [/QUOTE]

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