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<blockquote data-quote="BumpinTypeR" data-source="post: 5687203" data-attributes="member: 607000">ohm is a measure of resistance.&nbsp; the lower the ohm rating, the easier it is for current to flow.&nbsp; this means that most amps will be able to put out quite a bit more power at 1ohm than 4ohm.&nbsp; a dual 4ohm sub means it has two voice coils.&nbsp; this just gives you more wiring options.&nbsp; a dual 4 ohm sub can be wired at 2ohms or 8ohms.&nbsp; a dual 2ohm sub can be wired at 1ohm or 4ohms.&nbsp; and lets say you get a dual 2 ohm sub that can handle 500 watts rms.&nbsp; you would be looking for an amp that would put out around 500rms of clean power at either 1 ohm or 4ohms...although its much easier/cheaper to find an amp that does 500rms at 1ohm than it is to find one that does 500rms at 4ohms.a sealed box is afoten associated with sq (sound quality) it provides accurate/tight bass for a well rounded, good sounding, nice daily driver.&nbsp; a ported enclosure/bandpass consists of a box with a port in it.&nbsp; this is like a hole in the box, but alittle more complicated than that.&nbsp; usually ported enclosures make the bass louder, and is often used for spl (sound pressure level)the larger the enclosure, the less power you need to reach a desired loudness (in most cases)&nbsp; Also, in most cases a larger enclosure will be louder than a smaller one, but you can go too large.alpine type-r subs are great for the money.&nbsp; a 12&quot; type r is $125 shipped, not sure how much a 15&quot; would be.other great brands to look at would be fi, aq, dd, and re.hope this helped</blockquote>

[QUOTE="BumpinTypeR, post: 5687203, member: 607000"] ohm is a measure of resistance. the lower the ohm rating, the easier it is for current to flow. this means that most amps will be able to put out quite a bit more power at 1ohm than 4ohm. a dual 4ohm sub means it has two voice coils. this just gives you more wiring options. a dual 4 ohm sub can be wired at 2ohms or 8ohms. a dual 2ohm sub can be wired at 1ohm or 4ohms. and lets say you get a dual 2 ohm sub that can handle 500 watts rms. you would be looking for an amp that would put out around 500rms of clean power at either 1 ohm or 4ohms...although its much easier/cheaper to find an amp that does 500rms at 1ohm than it is to find one that does 500rms at 4ohms. a sealed box is afoten associated with sq (sound quality) it provides accurate/tight bass for a well rounded, good sounding, nice daily driver. a ported enclosure/bandpass consists of a box with a port in it. this is like a hole in the box, but alittle more complicated than that. usually ported enclosures make the bass louder, and is often used for spl (sound pressure level) the larger the enclosure, the less power you need to reach a desired loudness (in most cases) Also, in most cases a larger enclosure will be louder than a smaller one, but you can go too large. alpine type-r subs are great for the money. a 12" type r is $125 shipped, not sure how much a 15" would be. other great brands to look at would be fi, aq, dd, and re. hope this helped [/QUOTE]

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