Cerwin Vega Clsc 215 and Fence Audio 15'' Subwoofer playing loud!

Cerwin Vega Clsc 215 and Fence Audio 15'' Subwoofer playing 90% of full volume. Pre amp : Sansui DSP 9000-av Effect amp : Cerwin Vega 2.6kwA 2x750watt in 4 ohm and 1400watt bridged in 4 ohm. Enjoy