I have a practically new Hertz Hdp4 amp 1000w Rms @ 2ohms 600w Rms @ 4ohms! it literally had my saddlebags shaking while hooked up to my Pioneer 6x9's trust me its a great amp that will fit in the fairing on certain models definitely in the saddlebags I paid $599 it has a few hours of use id like to sell it for $395 Thanks