Small or mini amp for my TJ, any suggestions?

Has anyone had or heard of someone using a ATG (audio to go) amp? google does not produce much info.

local audio shop (they do bro dozer/dick trucks and lots of UTV's) has a few on sale. ATG4 is the model, 4ch, 125w rms, marine grade and on sale. $150. The dude sells high end gear. I would imagine this is his lowest priced mini amp.

Here is the only one I can find for sale:

https://customaudioshop.net/products/atg4-marine-full-range-class-d-amplifier