You dont need top of the line electrical system for 1 btl, u might need a strong capacitor possibly an extra battery but u dont need to get all that stuff for it, i have a 15" btl fully loaded on a hifonics brutus 20100, 2000rms, and no extras and my battery gage is fine, i am getting an extra battery just so it takes strain off the alternator but u dont NEED it.