inputs.text: hertz harley - searching various harley forums reading many reviews decided use hertz hcx 165 65\\ coaxial speakers glad research could not happy choice speakers fit batwing fairing 525\\ x 65\\ speaker adapters harley vented lower fairings harley 2011 stock speaker grills lowers concerned twitters would touch grill plenty clearence speakers absolutely rock bass incredible range need powered four speakers rockford fosgate pbr300x4 amplifier fits perfectly harley fairing cant tell pleased new system performs thank amazon hertz providing best prices listening experience went beyond expectations