i meant im getting a stronger alternator sorry lol, and its gonna be a problem havin 2 batteries and a capacitor? i mean what would u expect me to do than?

 

no, 2 batteries will work, but a 2nd battery is not going to benefeit you unless your electrical system isn't strong enough to run the amplifier. In the case that your electrical system can handle your amplifier, then you will not benefeit from a 2nd battery. A capacitor will run just fine with 2 batteries and a bigger alternator. A 2nd battery is just a 2nd battery to replace when they go bad. A cap is more important then a 2nd battery.