Specification Speaker Auto speaker Model 130APU04K Diameter 130MM 5.25 inch Rated power 100 watt Nominal Impedance 4 Ohm±15% Lowest Resonance Frequency 180±20% HZ Output Sound Pressure Level(S.P.L) 99 ± 3db Effective Frequency Band F0-10KHZ ,Average SPL±10db Certificate Post time: Aug-03-2018