inputs.text: get hd listen cd quality stations - correctionnow 5 stars instead 2 stars wrote response old kicker class amp causing interference via ground connection early class car amps killed radio reception would send oscillating noise cars ground crippling radio thought alpine tua550hd causing weak reception tua550hd actually receives stations slightly better alpine 9886 receiver search scan faster alpine 9886 receiver hd radio switches hd analog audio seamless not listen gospel music tuned gospel statio area hd sounds near cd quality recommend buy unit alpine receiver hd built long distance excellent picks stations us sun sets transmissions travel fm reception excellent definite buybelow initially wrote proved wrongi added alpine tua550hd unit alpine 9886 head unit alpine kcasc100 sirius satellite including steering wheel rehemote control usb reader slash file playeri felt added hd unit sound reception took dive listen fm head unit would pull long distance station night 300 miles away day would pull weak station get excellent reception head unit no hd put 1mh coil lpf dc power identical coil ignition power also add xterminator radio noise filter antenna terminalonce added hd unit long distance reception took dive local station fm weaker think rehemove unit later time since like receiving distant station believe get less multipath head unit no hd connected alpine spec radio heads show identicalfm specs not expect degradation receiver performancethis second hd radio first dual 6420 would pull stereo constantly flip flop digital analog due coverage area opinion point hd radio flop satellite reception far better sound quality better lots station never go coveragehd radio ackin stereo fm came stereo fm replace noise free 70 mile reception signal 40 mile noisy hissy multipath stereo signal broadcaster taken us ever closer 30 miles hd reception added absurb side channels broadcasters go full power digital maybe improvebtw must plug alpine ianet cable \\hd output\\ want hear sound hd unit source units satellite etc daisy chained head unit