SAVE $75: The Bang & Olufsen Beosound Explore Bluetooth speaker is on sale for $224 at Amazon, down from the standard price of $299. That's a 25% discount. $224 at Amazon $299 Save $75 Packing up for an adventure means figuring out how to bring along a soundtrack. A trip to the cabin or a lakeside campground all deserve to be experienced with a great playlist. If you could use an upgrade before summer to get a waterproof Bluetooth speaker , check out this deal at Amazon. As of April 22, the Bang & Olufsen Beosound Explore Bluetooth speaker is on sale for $224 at Amazon, marked down from the normal price of $299. That's a 25% discount that takes $75 off the price. It's also the lowest price we've seen at Amazon so far this year. A compact speaker with a scratch-resistant aluminum shell is exactly what we should be packing on adventures. With an attached carabiner, the B&O Explore speaker is designed to clip onto your backpack when you hit the trail.…