Recommend a good inexpensive amp for converting Aero City to stereo?

[NoAffinity]

Like the title says. I'm looking to tap in to the below connector, on the speaker side of the connector, and convert my Aero City to stereo. Can anyone recommend a good, compact, inexpensive amp that'll do the trick for stock speakers?

I got a $7 class D amp off ebay, which one of the reviewers of the product gave it 5 stars and said they used it in a bartop arcade with great success. When I hooked it up, however, I got snow on the monitor and washed out audio with a hum. The seller made some suggestions which didn't give any good results, and at this point I'm okay with shelving the $7 trial and error, and moving on to something that a fellow community member recommends.

All recommendations appreciated!

aero speakers.png

[Sp33dFr34k]

I've built one for my New Astro City, used a "Lepai Lepy LP-2020A" amp for this. Should be around $30. Make sure to use a high low converter before passing sound over to the amp though. Think I've sold my setup to bloodhokuto back then.