DESC: Experience smooth sound with A-Series. Pioneer s exclusive technology enriches your music by producing clear, open sound. Bring out the details of your music with A-Series speakers. The famed Pioneer A-Series speakers just keep getting better and better. Our TS-A1683R 4-ways now feature upgraded power handling. Every year, our engineers somehow find a way to improve on our Premier A-series speakers. This year, they feature something they ve inherited from the D-Series speakers, a basalt cone. And we re continuing to lead the industry with next-generation technology for improved sound: the tweeter, magnets, surrounds, the voice coil wire, the basket and more are all high-performance components that make up a great speaker.