Posted July 11, 201015 yr So my subwoofer (Alpine Type R 12") is dual voice coil 4 ohm. Now what I'm confused with is it's wiring down to 2 ohms (for 500 watts RMS). I wired down to "2 ohms", but is that per voice coil, making it 4 ohms, thus leaving me with only 300 watts RMS? If so, does that mean I'd have to wire it down to 1 ohm, making it 2 ohm total?Basically what I'm asking is if the ohms are per voice coil, or total. Any help would be great! This would really make things clear.
July 11, 201015 yr If wiring the woofer to 2 ohms the woofer will see total of 500 watts. 250 watts per coil.
July 11, 201015 yr when you wire a sub to any "ohm value", you are changing the resistance that your amp will see. Thus, wiring to 2 ohms, your amp sees 2 ohms of resistance and can push the desired 500 watts.
July 11, 201015 yr ^^^that being said, when you play music, this resistance will rise a small amount and you will not get to a true 500 watts.
July 12, 201015 yr No, the impedance will fluctuate. Resistance stays the same (unless/until heat from playing affects the voice coil and raises resistance a little).When you wired to 2 ohms, you wired the voice coils together. Thus making effectively one voice coil, which is 2 ohms.
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