Looking for a new head unit. My requirements are pretty simple: cheap (but decent), RGB, BT, and loudness button. I currently have an Alpine UTE-73BT in my beater truck, but the loudness button is worthless. It doesn't boost lows/highs, but cycles through my set EQ and 3 preset EQs that sound pretty terrible. Does anyone know if the following models have a functional loudness button? Specific models don't really matter... each brand has a half dozen models that look basically identical.
Pioneer DEH-S6220BS
Kenwood KMM-BT525HD (rear usb is a plus)
JVC KD-X370BTS
Pioneer DEH-S6220BS
Kenwood KMM-BT525HD (rear usb is a plus)
JVC KD-X370BTS