hi people where is wise to invest in order to receive better sound quality from same song, in new head unit like pioneer rs99, sony RSX-GS9 , or in dsp like helix pro or something else ?
i never owned dsp in my entire life...
i find them worthless and too much space consuming ?
my current set ups is received sony xb100bt , mosconi 120.4 120w per channel, morel virtus nanos 602, jl audio 5 series in the back and thats it....