here are the speakers: https://www.amazon.com/gp/product/B00FL2WX2K/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

Amplifier (not 100% sure connecting the echo dot line-out -> amp's mic input will work but if it does it will dim the audio nicely): https://www.amazon.com/gp/product/B01EZ426MG/ref=oh_aui_detailpage_o00_s02?ie=UTF8&psc=1