Can I use this for my Harley? Aquatic AV June 05, 2020 14:04 Updated You can use the AD.600.4 for your Harley if you are able to find a place to fit it in! Related articles WR5 (WR500) Specifications + Datasheet AD600.5 5/4/3-Channel Amplifier (AD605) - Owners Manual This unit has a built-in amplifier. Do I need another amplifier for my rear speakers? Coronavirus (COVID-19) Impact on Orders and Service Comments 0 comments Article is closed for comments.