inputs.text: good expected better top shelf price - im former professional car audio guy opinions may not apply seem nick picky considered alpine fan boy 67 years ago quest better sound quality hard drive based navigation went eclipses avn7000 external 51 box auto eqtime alignment aging eclipse lacks ipod support date maps decided ditch navigation use smart phone pick \\high quality\\ head unit ipod controls first impressions overall sound seemed harsh less dynamic took lot tweaking tuning real time analyzer get right setting turn internal power amp using external amplifiers doesnt actually turn internal amp mutes heat sink back side although cooling fan still gets hot use low sub woofer preamp voltage switched old alpine 4 volt preouts eclipse also 4 volt preouts didnt readjust amplifier gains switched eclipse alpine cda117 noticed sub woofer level noticeable lower even sub output level turned way actually lower gains 4 channel amp powering factory located speakers 20 degrees makes wonder sub output actually 4 volt preamp voltages not scaled properly frontrearsub im also not fan rca outputs fixed mounted straight rear although wasnt issue vehicle vehicles limited mounting depth using external amps rca cable might plugged unit add mounting depth cause rca cables damaged alpine used rca cables \\pig tale\\ allowed \\tuck hide\\ rca cables areas dash giving room less chance damage wires nit picking used install living see design flaws crazy thing alpine used right way higher end models good things although reviews complaining banking feature usb style hard drives slow speed processing large amounts music using ipod device not get slow banking feature like fact keeps basic controls simple advance \\tuning\\ features separate hate head units make navigate though menus simply change display view adjust sub woofer level rated 4 stars average person rate 3 stars hard coreserious users like