The impedance of the speaker is now cut in half. Wiring a second woofer in parallel gives us a few advantages: most importantly, the speaker is 6 dB louder (twice as loud), which also means the speaker will go 6 dB louder than its TM counterpart.
The results should be quite satisfying and surprising to those who choose to build it. The best part? Most of them are less than $100.The idea here is to take the heart of the Overnight Sensations (big sound, small box, cheap price), but increase power handling and efficiency by adding a second woofer. With the above in mind, find your favorite mini Bluetooth speaker among these options. Also consider features like the convenience of each speaker’s built-in controls, its ability (or inability) to easily attach to a bag or other objects, and whether or not it has a companion app. Some deliver more or slightly less than that, but 10 is the average. Regarding battery life, a top-level mini speaker should deliver at least 10 hours of wireless playback between charges.
So, a rating of IPX6 means that the speaker is water-resistant but hasn’t been evaluated for how well it fends off dust. Keep in mind that if either digit has an X in its place, the manufacturer hasn’t tested the speaker for either solids or liquids. The scale for solids ranges from 0 to 6, and for liquids, 0 to 9. The higher the number, the better the device keeps things like dust and rain out, respectively. The first digit signifies how well the speaker can resist solids getting in, while the second signifies liquids. So focus on their ability to withstand intrusion by solids and liquids, denoted by an IP (ingress protection) rating. Mini Bluetooth speakers are designed so that you can take them with you, including to places where they might get dirty or be otherwise exposed to the elements. That said, every product we suggested can pump out a powerful, vastly more enjoyable sound than your phone or tablet’s onboard speakers. Except for one model here, none of the speakers can deliver stereo sound, so if audio fidelity is a priority, consider a larger, fully waterproof speaker with multiple active audio drivers.
Be mindful that mini Bluetooth speakers typically pack fewer audio drivers than their larger siblings so that the manufacturers can keep them compact. Audio quality is (unsurprisingly) at the top of the list.
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