The Andrew Jones-designed Pioneer SP-EBS73-LR bookshelf speakers are designed to look graceful and classy, and their “virtual surround sound” qualities of clarity and power seem unable to be matched by any other speakers in their price range.
The best waterproof portable charger is the Unifun Waterproof External Battery. This charger has enough capacity to charge an iPhone 6 about 4 times. It has two USB ports to charge two devices simultaneously. One port has a higher amperage for charging tablets.
The speakers that produce the lowest bass are tactile transducers — they typically produce frequencies in the 0.5 – 20 Hz range. Tactile sound is not perceived through the ears — it perceived through the body