SPEAKER FR 87 4 OHMS; Transducer Function:Speaker; Power Rating RMS:15W; Impedance:4ohm; Sensitivity (dB):-; Resonant Frequency:137Hz; Frequency Response Min:100Hz; Frequency Response Max:20000Hz; Product Range:-; SVHC:No SVHC (07-Jul-2017); External Depth:98mm; External Diameter:98mm; External Height:39mm; External Length / Height:39mm; Sound Level SPL:85dB