Hey people, i have this speaker set with a subwoofer: https://www.amazon.com/Trust-Gxt-2-1-Speaker-System/dp/B008C1BSZ0
the subwoofer has a built in amp.
and this amp: https://reverb.com/uk/item/18096961-yamaha-ax-570-75w-channel-amp-phono-pre-amp
heres a picture of the back side...