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<blockquote data-quote="i2ain2thunder" data-source="post: 8099880" data-attributes="member: 631331"><p>Resistance-</p><p></p><p>Subs have a natural resistance, or impedance. What your sub's impedance and power handling are, determine what kind of power you need from an amplifier to get the most out of them safely.</p><p></p><p>Since less resistance is more power, the lower an ohm you can wire your subs to, the more power you will be able to give them with any amplifier.</p><p></p><p>Now less resistance also means more heat, strain, and lowered sound quality. (not very noticable though) Since it adds heat and other factors some amplifiers cannot perform at 1ohm.</p><p></p><p>Some amplifiers can perform at .5ohm, some amplifiers cannot run bridged less than 4 or 2 ohms. You really need to check the ratings on your amplifier to see what it can do, it it is not rated at 1ohm, it likely cannot output at 1ohm.</p><p></p><p>To answer your question. A subwoofer has a single, or dual voice coils.</p><p></p><p>2 or more voice coils may be wired together to use the same channel of an amplifier.</p><p></p><p>When wiring 2 voice coils together you must wire them in either series or parallel, the way you wire will determine the overall resistance/impedance.</p><p></p><p>So to shop for subs and amps.</p><p></p><p>step 1 consider your car's electrical, how much can it handle.</p><p></p><p>step 2 Determine a budget</p><p></p><p>step 3 shop for subwoofers, think about how much power your current car's electrical system can handle. We'll say 1000watts rms. determineing you have 1000watts rms to work with, find any combination of subs that will handle 1000watts rms. That may be 4 250watt rms, or 2 500watt rms subs, or 1 1000 watt rms sub.</p><p></p><p>Once you have found a sub you will need to check the voice coils of the sub(s), and how you will be wiring them.</p><p></p><p>It is generally cheaper to wire subs down to 1ohm and find an amp that is 1ohm stable, as 1ohm is low resistance and it is easier for amps to make that power, you will be able to save money and find an amp that does 1ohm stable. In general it will cost you more to get an amplifier that will do 2ohms or 4ohms at the same amount of power you would get from an amplifier that will do that same power in 1 ohm.</p></blockquote><p></p>
[QUOTE="i2ain2thunder, post: 8099880, member: 631331"] Resistance- Subs have a natural resistance, or impedance. What your sub's impedance and power handling are, determine what kind of power you need from an amplifier to get the most out of them safely. Since less resistance is more power, the lower an ohm you can wire your subs to, the more power you will be able to give them with any amplifier. Now less resistance also means more heat, strain, and lowered sound quality. (not very noticable though) Since it adds heat and other factors some amplifiers cannot perform at 1ohm. Some amplifiers can perform at .5ohm, some amplifiers cannot run bridged less than 4 or 2 ohms. You really need to check the ratings on your amplifier to see what it can do, it it is not rated at 1ohm, it likely cannot output at 1ohm. To answer your question. A subwoofer has a single, or dual voice coils. 2 or more voice coils may be wired together to use the same channel of an amplifier. When wiring 2 voice coils together you must wire them in either series or parallel, the way you wire will determine the overall resistance/impedance. So to shop for subs and amps. step 1 consider your car's electrical, how much can it handle. step 2 Determine a budget step 3 shop for subwoofers, think about how much power your current car's electrical system can handle. We'll say 1000watts rms. determineing you have 1000watts rms to work with, find any combination of subs that will handle 1000watts rms. That may be 4 250watt rms, or 2 500watt rms subs, or 1 1000 watt rms sub. Once you have found a sub you will need to check the voice coils of the sub(s), and how you will be wiring them. It is generally cheaper to wire subs down to 1ohm and find an amp that is 1ohm stable, as 1ohm is low resistance and it is easier for amps to make that power, you will be able to save money and find an amp that does 1ohm stable. In general it will cost you more to get an amplifier that will do 2ohms or 4ohms at the same amount of power you would get from an amplifier that will do that same power in 1 ohm. [/QUOTE]
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