![]() Load it up with any particularly fragile items, plug the bass port with an included rubber stopper, and you've got yourself an everything-proof box to keep your stuff safe. The DemerBox DB2 for $399: The DB2 is a perfect companion to your boldest outdoor adventures, in large part because it serves two purposes: It's a loud portable speaker with 40 hours of built-in battery life, and it's also a crushproof Pelican case.Here are a few other good products that didn't quite make the cut. Like the Stockwell II, it has a built-in battery gauge. If you want a little more power and heft, the Marshall Kilburn II ($280) is similarly excellent, and the Marshall Emberton ($150) is a great extra-portable addition to the amp company's Bluetooth line. You'll enjoy toting all 3 pounds of it around with its carry strap, which has a leather feel on the outside and red velvet on the inside. It has a front-facing woofer and a tweeter on each side, powered by a battery that lasts around 20 hours (USB-C charging with a 3.5-mm jack too), depending on how much you tweak the stylish volume, treble, and bass knobs up top. The exterior has a durable-feeling, splash-resistant silicone finish, and the front and back are covered with a steel grille. For a speaker that's about as big as four old DVD cases stacked, standing upright, it sounds killer, with a smooth, balanced, and refined sound. As with all Marshall products, you pay a price for the style, but the audio lives up to expectations. If you're a music fan or just love the classic Marshall guitar amplifier design, this Bluetooth speaker is ready to rock. Subscriptions help fund the work we do every day. com and our print magazine (if you'd like). Special offer for Gear readers: Get a 1-year subscription to WIRED for $5 ($25 off). Updated June 2022: We've added the Positive Grid Spark Mini, and information about the upcoming KEF LSX II Wireless. Here are our favorites right now.īe sure to check out all our buying guides, including the Best Soundbars, Best Wirefree Earbuds, and Best Smart Speakers. We've tested hundreds of models in the past few years, and we can happily say they are still some of the best small devices you can listen to. They'll also work with any smartphone, and they sound as good as their smart-speaker equivalents. By (mostly) forgoing voice assistants and Wi-Fi radios, Bluetooth speakers gain portability, with the ability to venture outside of your house and withstand rugged conditions like the sandy beach or the steamy Airbnb jacuzzi. It's fun and easy to ask an Amazon Echo or Google Nest speaker to play your favorite track or tell you the weather, but smart speakers have a few crutches-first and foremost, stable Wi-Fi. Works correctly now, chrage current around 1A+ and reducing approaching to full charge.The best Bluetooth speakers still have a place near and dear to our hearts, even as we've seen better (and more portable) smart speakers creeping into the universe. Charge controller has no reverse polarity protection designed for it. Seems that the unit was connected with reverse polarity. It's BQ24617 standalone battery charger that's fried, will try to replace. I disassembled my boombox trying to isolate the problem, well I didn't have to look far, picture attached. Xtreme uses TI BQ2461X battery charge controller which should start charging if battery voltage is above set threshold and it is not overheated. ![]() As xtreme does not have any kind of battery gauge, so it's very likely that boombox uses similar system. I did not manage to find boombox service manual, although xtreme service manual is available. When boombox is off, it draws around 22mA, when I turn it on it's around 42mA, seems like normal standby current, but does not seem to charge, although it turns on and draws battery power as well as it works when plugged in as current draw seem to fluctuate with sound level and goes well into 2amp territory when I crank up the volume. That's about all the advice I can give, as I have no experience with that product and no service manual seems to be available (that I can find anyways). If all of that checks out, it may be time to start digging into the charging circuit, or power management circuit if it's got one (for instance, to lower the charge current while the speaker is being played at high volumes to ensure sufficient power goes to the audio amplifier). Even though it's a new battery, maybe it's been sitting around a little while and is pretty much completely discharged? Charging circuits for li-ion will normally significantly limit the charge current if the cell voltages are below a certain point (very deeply discharged) or imbalanced (in the case of series-connected cells). Does it put out a nice clean 20V relatively free of AC ripple when plugged in to the device? Also, the battery voltage. First thing I would do: check voltages! Per manufacturer's specs the power supply should put out 20V at up to 4A.
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