The copy bought in August has thrilled me. The surprisingly Softigen bass and airy sound in classical music to rock, both at low and at high level, I found ideal. So I bought two more copies. Visually I have noticed on the unit and packaging no difference. At the sound they are worlds apart. The already good bass were raised slightly more, which leads to distortions and for the heights strongly attenuated. This is a special kind product has been adapted to its price. Pity! (Both Bluetooth and cable connection was tested with different levels - charged battery.) He still deserves when compared, whatever we get for the price of 3 stars.
