4 ch amp used works great powering speakers built in high pass low pass filter
110 shipped
http://www.crutchfield.com/S-QhUwx5pTV7U/p_500MRVF540/Alpine-MRV-F540.html
110 shipped
http://www.crutchfield.com/S-QhUwx5pTV7U/p_500MRVF540/Alpine-MRV-F540.html