I'm looking for the "best" inside antenna for my HP1. As we currently reside in a rental duplex an outside antenna is prohibitive due to landlord constraints. What is the best overall inside antenna??? Also why is the audio portion of this unit so LOW I need to adjust it almost 3/4's to hear it approx. 12ft.away, & no my hearing is adequate, Att. off however AGC is on. My old Pro 96 R/S handheld is very audible at 1/2 gain.