Hello - I have a couple of old bookshelf speakers that I would like to pair up with a chromecast audio, but I need an amp. The speakers have bare wires and are labeled as 40W, 6 ohms. Can anyone recommend a decent amp that will work with this setup? I am far from an audiophile, so it doesn't need to be top of the line. Most of the recommended amps I've seen are either too low powered, too expensive, or don't have bare wire outputs. I'd like to stay below $100, but I'm willing to entertain options higher than that if necessary. Thanks!