Sonos Play: 5 ( 2015, Black)
While fairly pricey the second-gen Play:5 is the best-sounding Sonos speaker yet.
DemerBox Big Bang
The DemerBox Big Bang Bluetooth boombox is at the top of its class in bass response, loudness, durability, and battery life. It's not the cheapest device on the shelf, but if you can afford it, the Big Bang is well worth the cost for a hand-built wireless speaker built entirely in the USA.
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JBL Flip 3 ( Black)
Enhanced with better battery life and splashproof design, the Flip 3 is one of the best mini portable Bluetooth speakers available.
Denon HEOS 1 ( Black)
The Denon HEOS 1 offers a rugged design and a great feature set to users who want the flexibility of both multiroom music and optional Bluetooth portability.
Sony SRS-X11 ( Red)
While you can get even cheaper Bluetooth models, the SRS-X11 is one of the better-sounding micro wireless speakers and offers 12 hours of battery life.
Philips Flex ( Blue and Green)
The Philips Flex works OK for casual listening at midlevel volumes, but your dollar can go further with other models that sound much better.
Beats Pill XL ( white)
The combination of the Pill XL's strong sound, excellent design and feature set make it a reasonable value despite its elevated price tag.
Bowers and Wilkins 685 S2
Whether you listen to death metal or nature documentaries, the Bowers and Wilkins B&W 685 S2s are an astoundingly good set of speakers and an excellent deal at this price level.
Bose SoundLink Bluetooth speaker III
Though it remains somewhat pricey, the Bose SoundLink Bluetooth Speaker III is a superlative portable wireless loudspeaker, improving on its already impressive predecessor.
Oontz Curve by Cambridge SoundWorks ( Titanium Black)
Cambridge SoundWorks' Oontz Curve has some shortcomings and isn't head and shoulders above the rest of the tiny budget wireless Bluetooth speaker world, but you're not going to do too much better for $30.