amp..
I, unfortunately know of none, plug and play amps for the Goldwing. There probably is? I personally purchased an amp out of a 2007 Goldwing (wrecked) and wired it in to my radio. The new wings have a 80 watt per channel amp. If you google GL1800 stereo upgrades there are a couple of sights showing installation of amps on wings. Space is the biggest problem, that is why I went the OEM amp route on my 02. The amp fits nicely behind the rear fender, not taking any space up in the tourbox. If you have a wife packing with you, you know you can't spare the space! J&M was a good choice for your speaker selection. I would install the speakers and ride before diving into the amp, the stock radio is quit good and may more then do the job for you. If not, then go the amp route. Let's ride!