Overview You must have JavaScript enabled and Flash 9.0.115 to see this content. Boston Acoustics SPG555. 5x7" copolymer cone woofer with TwinStage™ heatsink Woofer's neodymium motor structure offers extraordinary power-to-weight ratio Type-S1 1" Kortec® dome tweeters Model Specific integrated muti-element crossovers Specifications Nominal Impedance 4 ohm Recommended Amplifier Power 75watts RMS-200 watts peak Mounting Depth 2-3/8" (60mm) Nominal Size 5x7-inch Sensitivity [1 watt (2.83v) at 1m] 90dB Frequency Response (±3dB in car) 45Hz-20kHz System Type 2-way
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