Stylish design, NFC pairing, and an evocative name highlight this small outdoor Bluetooth speaker. Audio fidelity, on the other hand, doesn’t make that list. The Voom 20 sounds good. Not great, not bad, just good; albeit with an above-average amount of bass, especially for its svelte dimensions (the speaker is enclosed in an approximately 7.6-inch-long, 2.8-inch-deep, 2.4-inch-tall flattened cylinder).

That’s great if you’re looking for a small, very portable, weather-resistant bass monster. But you’ll also want to know that this speaker’s upper mid-range and high-frequencies are a tad limited. Combine that with the constrained stereo separation that’s inherent in a small standalone speaker and I found myself turning the unit to the side or playing other placement tricks so I could pick out the separate instruments.
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https://www.techhive.com/article/3109588/speakers/vava-voom-20-bluetooth-speaker-review-weatherized-style-with-average-sound.html