how to get enought juice

[venom]

gang i,d like to install a mean sound system with amp. Ive seen a couple of you guy's with fairing's and mean speaker's.... how do you get enought juice

[altonk]

Mount a generator in the trunk or live with around 200 watts
Or you could just mount a good set of headphones in ur helmet and give the rest of the world a break

[aka1004]

Low draw "class D" digital amp is the way to go.
I went with eclipse class d amp, 4 channel amp runs In 4 ohm mono, driving a set of 6 1/2" components(Polk audio) good enough for me to hear music over two bros without tip and race air system and never had problem with battery. I had hid all around extra led also.
A better more expensive choice will be alpine class D amp that will run you like 400-500 bucks compared to 190 I paid for eclipse amp. 8 gauge power cable from battery with fuse by the battery will do.