Verified answer

The voltage is dependent on your alternator when the car is running and the battery when the car is off, nothing else.

The average voltage with car running is 13.8 volts.

The average voltage with car off is 12.5 volts.

There is nothing to set.

The most voltage the electronics in the car could handle is 15 volts, after that your asking for trouble. Some aftermarket alternators will supply 14.4 volts continuous.

In all reality, you wouldn't even hear the difference.

All electronic equipment is rated over the range of voltage that is available. On a 12 volt vehicle it could be 11.8 to 15 volts, so the equipment must work well at any voltage. So, if you are sitting somewhere listening to the radio with the engine off, the battery voltage will be low, if you driving down the freeway the battery voltage will be high. Those ratings apparently serve only to confuse a lot of people, or cater the the electro-nuts that demand to know every parameter of operation.

In other words, you probably cannot tell the difference in output, so it is nothing to be concerned about.

those issues could be tuned in with the aid of ear and the kind of music you pay attention the sub you like can cope with 350 RMS at 4 ohms and the amp is barely making 60 RMS in step with channel it is a hundred and twenty RMS at 4 ohms to feed a subwoofer that can cope with 350 RMS at 4 ohms,pay attention sub woofers run perfect on a mono amp or a million channel and there made for doing this seem for a kicker mono amp it will make a minimum of a hundred and fifty rms and that they underrate they amps so which you would be able to assume extra suitable than a hundred and fifty.the suitable way is to tournament the sub woofers RMS score to the amplifiers at 4 ohms.the RMS score is the real potential a amplifier makes and a sub woofer can cope with,that the final analysis, watts do no longer propose sht.good success with your gadget.