Here's an obscure one, but the best portable speaker for the buck I have seen in quite a while. The $39
Bugani Brief Plus portable speaker is a dumb Bluetooth and Aux In speaker featuring a 4" woofer and two 2" tweeters with a downward firing passive and about 80 watts total power.
Black Friday priced at $39 in tungsten/black and $45 with coupon in mar-a-lago gold/black they have sold historically for $99.
What makes it a deal to me is the sound, frequency response is tuned very close to the BK curve on my Wiim, they sound near identical near field indoors except the Brief is a bit less bright. It maintains the balance at all volume except at the very highest. Very clear and well balanced on my bedside table. Its an audiophile tuning, perfect for what I listen to. In its nearfield spot it sounds significantly better than a $200 AudioPro C5a, a $150 Sangean WR-55, and even a JBL Authentics 200 I've had in the same place. It sounds world's better than the new $200 Echo Studio, (but I think almost anything does). I'd love to compare it to the new Wiim Sound Smart.
Downside, it has no features at all except for the line input. No app, no lights. Battery life is quite good and materials are very good. It does shut itself off after 10 minutes of no signal. The very loud hello and goodbye on start up and shut down are annoying. I feed it from a Wiim and for that it is near perfect. If you are looking for a cheap featureless speaker with quite good sound, it does that.