EDIFIER R1700BT 2.0 Bluetooth bookshelf active speaker system (Black) Versatile speakers will have you wanting to play every device off of them. Plug in your gaming console, computer or TV for exceptional sound quality. The R1700BT has built-in Digital Signal Processing (DSP) and Dynamic Range Control (DRC) to prevent distortion. The R1700BT is equipped with a 19mm dome tweeter and a 4-inch bass driver in each speaker creates rich lows and clear highs. With the front facing bass reflex port, low frequencies are emphasized giving the bass more power.