Si400 Specifications Type : 4” dual cone speaker RMS Power : 25W Peak Music Power : 200W Freq Range : 40Hz-20kHz Impedance : 4 ohm Resonance : 90Hz Sensitivity : 87dB Magnet : 70 x 10mm Features Paper with foam surround

Si600 Specifications Type : 6” dual cone speaker RMS Power : 30W Peak Music Power : 240W Freq Range : 65Hz-20kHz Impedance : 4 ohm Resonance : 85Hz Sensitivity : 91dB Magnet : 80 x 10mm Features Paper with cloth surround

Si690 Specifications Type : 6”x9” 2-way speaker RMS Power : 35W Peak Music Power : 280W Impedance : 4 ohm Resonance : 56Hz Sensitivity : 90dB Magnet : 80 x 15mm Features Paper with foam surround 1” PEI Tweeter Ferro fluid cooled tweeter