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<blockquote data-quote="Umbra" data-source="post: 8288889" data-attributes="member: 658055">Depending on a bunch of factors and the build quality of the sub you can surpass the RMS rating, but if you&#039;re new to this it&#039;s best not to exceed the RMS rating of the sub too much.You&#039;re looking for a 15&quot; sub, obviously. Is the box sealed or ported (meaning there&#039;s a slot tuned to a certain frequency)?You&#039;re correct. You want the sub to be rated for not much more than 400W RMS if it&#039;s a 4ohm load or 600W RMS if it&#039;s a 2ohm load. Ohms are a measure of impedance, or electrical resistance. The less resistance, the more power (an oversimplification, but that&#039;s the gist).The subs coils are what helps them moved and they come in different impedance so you have wiring options. Subs are either single voice coil (SVC) or dual voice coil (DVC). If they&#039;re SVC they have one set of terminals (positive and negative), if they&#039;re DVC they have two sets of terminals.The advantage of DVC subs is you have more wiring options; you can wire the coils in series or parallel with one another. For example, a SVC 2 ohm sub is just that, 2 ohms. Same with a 4 ohm sub. But if they&#039;re DVC 2 ohms you can wire the sub for a 4 ohm load or a 1 ohm load. If it&#039;s DVC 4 ohms you can wire it for an 8 ohm load or a two ohm load. If you have multiple subs you have even more options. You can wire the coils one of two ways, then the subs themselves one or two ways.The coil configuration is just for wiring. SVC and DVC subs should sound the same.For your setup you&#039;d probably want either a SVC 2 ohm sub or a DVC 4 ohm sub (wired in parallel to 2 ohms) so you can feed it 600W RMS. Come back to this thread if you get a DVC sub and we&#039;ll show you how to wire it.</blockquote>

[QUOTE="Umbra, post: 8288889, member: 658055"] Depending on a bunch of factors and the build quality of the sub you can surpass the RMS rating, but if you're new to this it's best not to exceed the RMS rating of the sub too much. You're looking for a 15" sub, obviously. Is the box sealed or ported (meaning there's a slot tuned to a certain frequency)? You're correct. You want the sub to be rated for not much more than 400W RMS if it's a 4ohm load or 600W RMS if it's a 2ohm load. Ohms are a measure of impedance, or electrical resistance. The less resistance, the more power (an oversimplification, but that's the gist). The subs coils are what helps them moved and they come in different impedance so you have wiring options. Subs are either single voice coil (SVC) or dual voice coil (DVC). If they're SVC they have one set of terminals (positive and negative), if they're DVC they have two sets of terminals. The advantage of DVC subs is you have more wiring options; you can wire the coils in series or parallel with one another. For example, a SVC 2 ohm sub is just that, 2 ohms. Same with a 4 ohm sub. But if they're DVC 2 ohms you can wire the sub for a 4 ohm load or a 1 ohm load. If it's DVC 4 ohms you can wire it for an 8 ohm load or a two ohm load. If you have multiple subs you have even more options. You can wire the coils one of two ways, then the subs themselves one or two ways. The coil configuration is just for wiring. SVC and DVC subs should sound the same. For your setup you'd probably want either a SVC 2 ohm sub or a DVC 4 ohm sub (wired in parallel to 2 ohms) so you can feed it 600W RMS. Come back to this thread if you get a DVC sub and we'll show you how to wire it. [/QUOTE]

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