JBL JRX115 15"" 2-Way Speaker Cabinet - Pair JBL 15" low-frequency driver with a 64mm (212") diameter edge-wound ribbon voice coil which provides more cross-sectional wire area in the voice coil gap than round wire designs, for greater efficiency and power handlingFerro-fluid cooled compression driver with titanium diaphragm improves high frequency performance as well as system reliabilityThe advanced network topology crossover design shapes the frequency response to deliver coherent summation in the crossover regionHigh-voltage capacitors