Dolphin Audio
Dolpin Audio offers a line of Bluetooth speakers, PA systems, and DJ party speakers. They are made in China and sold by a distributor in Los Angeles. A few of their products appear very similar to Soundstream products, so perhaps they are made by the same manufacturer.
Here is a list of current Dolphin products as of 2017:
SP-10R BT
SP-12 BT
SP-116 BT
SP-119 BT
SP-144BT
SP-145BT
SP-146BT
SP-147BT
SP-153BTR
SP-154BT
SP-15BTR
SP-192 BT
SP-202BT
SP-210RBT
SP-23 BT
SP-30 BT
SP-400BT
SP-411BT
SP-488BT
SP-50 BT
SP-500BT
SP-600BT (this boombox appears almost identical to the Soundstream Street Hopper, please visit that page).
SP-63BT
SP-64BT
SP-65BT
SP-7R BT
SP-8R BT