The last Devotec Solar Sound was a good portable boom box, but tinny sound quality and crappy buttons kept it from being great. I recently recieved a Devotec Solar Sound 2 and had a chance to give it a heavy stress test.
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First, I left it outside (uncharged) in the sunlight for about 30 minutes. Then I took the Solar Sound 2 out to a nearby park and hooked it up to my Evo through Bluetooth. Fully charged, the SS2 can deliver ten hours of continuous play time. On a sunny day, it can play from zero battery.
The front control panel on this model is much improved from the last edition. There is still a bit of lag when altering the volume or pausing play, but I had no trouble getting the sensors to recognize my touch.
The sound quality is much better on the SS2. It delivers much deeper base, although it still sounds a bit tinny and fuzzy when delivering extra-high or loud notes. Strapped with duct tape to a jeep, it was loud enough to be clearly audible at 60 mph with no doors or roof. This is not a high definition speaker, but it gets the job done and represents a significant step forward from the last edition.
The Solar Sound 2 will set you back $99. It is extremely portable, taking up no more space than a pencil bag or a roll of rope. It has a fuzzy, smoked glass finish and looks pretty cool when lit up.