In my HU-605 there is hidden menu with equalizer settings for the sound.
What's the best setting for best quality sound?
The HU-605 has a hidden menu. With the stereo off, hold the "select" knob in and turn the on wile still holding the "select" knob in for about 5 seconds. This gives the capability to adjust:
Front Low1
Front Low2
Front Mid
Front High
Rear Low
Rear Mid
Rear High
[youtube]https://www.youtube.com/watch?v=xUU1Zax5Vic[/youtube]
[youtube]https://www.youtube.com/watch?v=enp9TqAh2es[/youtube]