πLAB POINTS mid-sized passive audiophile speakers; Carbon is the most affordable model in Pro-Ject's Speaker Box line 5" fiber glass carbon composite woofer, 1" silk dome tweeter recommended amplifier power: 10-150W magnetic speaker grilles included available in (6) finishes "The speaker delivers an audiophile flat frequency response from 65 to 20,000 Hz with flawless details. It offers a tight powerful bass and keeps the musicality alive." - Pro-Ject Audio π KEY FEATURES recommended amplifier power: 10 - 150W frequency response: 65 Hz - 20 kHz impedance: 4 ohms sensitivity: 86 dB crossover frequency: n/a high frequency driver: 1" silk dome mid frequency driver: low frequency driver: 5" carbon fiber glass dimensions: 10.63" (h) x 6.50" (w) x 8.66" (d) / 270 x 165 x 220mm weight (total): 10.5 lb / 4.75 kg π¦ COMES WITH removable grilles