Bang on. A popular amp is a TPA3116 module. You can see thousands of examples on Aliexpress: https://www.aliexpress.com/wholesale?catId=0&initiative_id=SB_20181

Bang on. A popular amp is a TPA3116 module. You can see thousands of examples on Aliexpress: https://www.aliexpress.com/wholesale?catId=0&initiative_id=SB_20181031152231&SearchText=tpa3116 https://www.aliexpress.com/wholesale?catId=0&initiative_id=S... For speakers, the cheapest option is to buy some second-hand ones on eBay/Gumtree/Craigslist. Just Google model names and look for ones with good reviews. I like British speakers, so I usually search for Tannoy, B&W, KEF etc.