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Can I wire a 4ohm sub to make it a 2ohm sub?
I have a Diamond D3 12" subwoofer and an Alpine MRP-M500 amplifier. It's a 500 Watt amp- 500 watts RMS@ 2ohms and 300 watts RMS@4ohms. I was wondering if I could rewire the subwoofer to make it a 2ohm sub so it would draw more power and play louder. Is that even possible?
Adding a couple other questions:
1) So you are saying that I CAN wire the voice coils so that they are 2 ohms each? If I did that, would that allow the sub to draw all 500 watts from the amp?
2) When a sub's max power is stated, does the amp's total output or the RMS count? (I think it's the RMS, right?) So if I hooked up a 2000 watt amp that put out 650 watts RMS@4 ohms to my sub (800 watts max), would it blow my sub because it's 2000 watts? Or would it play fine because the sub is 4 ohms and is only drawing 650 watts?
OK, the sub was already wired that way. So the way that the sub is wired now puts a 2ohm load on the amp; so it's drawing max power right now.
Thanks for the info, dude.
2 Answers
- PimpMyRideLv 71 decade agoFavorite Answer
A subwoofer with a single 4 ohm voice coil cannot be wired to 2 ohms.
But, the Diamond D3 is a DVC sub. If yours has 4 ohm voice coils, you simply connect the voice coils in parallel. The resulting impedance to the amp is 2 ohms.
Like the diagram here:
http://a248.e.akamai.net/pix.crutchfield.com/ca/le...
It may already be connected that way, and you are getting the maximum power output that the MRP-M500 can safely deliver.
If your Diamond Audio D3 is a "4 ohm sub" because is really has 2 ohm voice coils and they are connected in series, there's no way you can safely rewire it to that amp. The MRP-M500 is not stable below 2 ohms. If you connect a DVC 2 ohm sub like the diagram above, the final impedance is 1 ohm. The amp will draw more current than it is designed to handle and probably overheat and fail when connected to a 1 ohm load.
