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<blockquote data-quote="DennisS" data-source="post: 8842496" data-attributes="member: 688895"><p>SLAPP, Hello. In the industry the rule of thumb is use a1 farad capacitor per 1000 watts. However if your amp really puts out 3000 watts of power continuously, you will need 2 of the 1 farad caps for each 1000 watts to keep up with the power draw of the Bass notes. What; brand of amp are you using? Linear Power, Hifonics, Rockford Fosgate, Pyramid, Stillwater Designs? What size speakers are you driving with this big amp? 6 15inch in a box? Is the amp 2, or 4 channel? is it bridgeable? You may want to use active crossover(s) between the head unit and the amp to control the frequency. How big is the box you are using for the subwoofers? If your amp is 3000 watts divided by 4 channels RMS it is a huge amp and even bigger if only a 2 channel. The headroom of the amp may be 3000 watts that will allow an occasional peak of the max rated power of each channel in watts per channel for a 4 channel, or watts per channel for a 2 channel amp. If you are bridging a 2 channel amp. The actual formula is: Power (W) = (Volts x Volts) or P = V^2 / R for example: A 50 watt/channel amp with a resistance of 4 ohms drawing 14.4 VDC (volts in DC current) with one two channel amp at peak will achieve: (14.4 VDC x 14.4 VDC) / 4 = 51.84 watts for each channel on the amp. Also keep in mind that a 4 ohm 2 channel amp in bridged mode will more than likely become 4 times the power in a 2 ohm load on the amp. That creates more heat. (Another calculation)</p></blockquote><p></p>
[QUOTE="DennisS, post: 8842496, member: 688895"] SLAPP, Hello. In the industry the rule of thumb is use a1 farad capacitor per 1000 watts. However if your amp really puts out 3000 watts of power continuously, you will need 2 of the 1 farad caps for each 1000 watts to keep up with the power draw of the Bass notes. What; brand of amp are you using? Linear Power, Hifonics, Rockford Fosgate, Pyramid, Stillwater Designs? What size speakers are you driving with this big amp? 6 15inch in a box? Is the amp 2, or 4 channel? is it bridgeable? You may want to use active crossover(s) between the head unit and the amp to control the frequency. How big is the box you are using for the subwoofers? If your amp is 3000 watts divided by 4 channels RMS it is a huge amp and even bigger if only a 2 channel. The headroom of the amp may be 3000 watts that will allow an occasional peak of the max rated power of each channel in watts per channel for a 4 channel, or watts per channel for a 2 channel amp. If you are bridging a 2 channel amp. The actual formula is: Power (W) = (Volts x Volts) or P = V^2 / R for example: A 50 watt/channel amp with a resistance of 4 ohms drawing 14.4 VDC (volts in DC current) with one two channel amp at peak will achieve: (14.4 VDC x 14.4 VDC) / 4 = 51.84 watts for each channel on the amp. Also keep in mind that a 4 ohm 2 channel amp in bridged mode will more than likely become 4 times the power in a 2 ohm load on the amp. That creates more heat. (Another calculation) [/QUOTE]
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