As someone who regularly modifies speakers, swaps components and tries all the snake oil, I was pretty surprised that these speakers made me happy. They just don’t do anything wrong. You pull them out of the box, pair them with Bluetooth on your device of choice, and you have great audio. Are they perfect? Maybe not, but they are made so well that spending extra money for upgrades or modifying them would bring you immediately to the point of diminishing returns, and in my book that means that the S350DBs are very, very good at what they do.