Parametric EQ and crossovers are great, perfect sound quality.
Biggest issue is with the SD reader, always has read-errors and can only read 200 songs. The USB input has less read issues and can ready 1000's of songs, but it is only on the front, so you are likely to break off the flash drive because it's sticking out of the front of the deck. I think it just looks bad to have a flash drive sticking out of your dash anyway, might as well be covered in duck tape.
Vette: Deck - Kenwood Excelon KDC-X692; 4-Channel Amp - Rockford 400a4; 1-Channel Amp - MTX 801D; Tweeters - Alpine SPR; Mids - db Drive 360w 5"; Woofers - Alpine SPR176A 6.5"; Subwoofer - Rockford RFP1210 10".....
Ion Redline: Deck - JVC KD-SH1000; 4-Channel Amp - Rockford 400a4; 1-Channel Amp - two MTX 801D; Tweeters - Alpine SPR; Mids - Alpine SPR135A 5.25"; Woofers - Alpine SPR175A 6.5"; Subwoofer - two Eclipse SW6210 12".....
Sebring: Deck - Pioneer DEH-P6000UB; 4-Channel Amp - MTX 404; 1-Channel Amp - MTX 421D; Tweeters - Alpine SPR; Mids - Pyle 5.25"; Woofers - Infinity Mits 6"x9"; Subwoofer - Alpine SWR-1042D 10"