One more question. Is it ok if the amp only pushes out 60 RMS and the speakers max is 100 RMS? Some people say that you should over power them by like 5-10 RMS. I wanna know if that will work well with my speakers.
Ya I'm gonna change amps. I'm gonna get an Alpine PDX-V9. It pushes out 100 RMS which is the same as the speakers max. Then turn down the gain a bit so there won't be any distortion. That will work right?
To the OP: The speaker you wire into the amp dictates what ohm level you will be running. You cannot simply select 2 or 4 ohms, the sub is either-or. What sub are you planning on hooking up to the amp? Subs will have a "nominal impedance" rating; some are single voice coil, some are dual. Each voice coil will have it's own impedance, measured in ohms. If you have a single 4 ohm voice coil, you will run the amp at 4 ohms; there is no way to change that speaker to make the amp run 2 ohms. If your sub is a dual 4 ohm voice coil, than you can wire the two coils together in one of two ways. In a series configuration, your dual 4 ohm sub would be at a 8 ohm final load into the amp, while a parallel configuration would put your sub at a 2 ohm final load. Most car audio subs are a single 4 ohm speaker, but higher end subs will often be the dual 4 ohm speakers.
As someone else mentioned, your 5 channel amp will allow you to wire four 4-ohm speakers into the 4-channel part, and any sub configuration that does not measure below 2 ohms. You will get more power for the sub(s) at 2 ohms than at 4, but a 4 ohm sub will be slightly better sound quality; the lower the impedance, the lower the signal to noise ratio, meaning more distortion.
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