Hertz Cento CX 100 4 Inch 10cm 2 Way Car Dash Door Coaxial Speakers 40w RMS PairHertz CX 100100 (4) mm (in.) Coaxials 120 W 4 Ohm Coaxial loudspeakers represent a major design challenge due to the critical nature of their acoustic output, being installed in an OEM placement often unfavorable to reproduction. For this reason, in order to achieve high performance, a great engineering effort was put into place, promptly addressed by our R&D team. The Cento two way coaxials CX 100 features the new 24 mm (0. 9 in.) Tetolon dome