| Composition | KENWOOD DDX3021 | KENWOOD DDX-6039 |
| Tuner | has a digital | has a digital |
| CD players | yes | yes |
| MP3-players | yes | yes |
| DVD-player | yes | yes |
| Blu-ray player | no | no |
| Amplifier | yes | yes |
| Equalizer | yes | yes |
| Navigator | no | no |
| TV tuner | no | no |
| General characteristics | KENWOOD DDX3021 | KENWOOD DDX-6039 |
| Maximum power | | 4x50 W |
| Nominal and maximum power | 4x30 W/4x50 W | |
| Size | 2 DIN | 2 DIN |
| Management changer | CD | CD, DVD |
| CD-changer interface is | custom | custom |
| Color | black | black |
| Supported carriers and formats | KENWOOD DDX3021 | KENWOOD DDX-6039 |
| Formats | CD-Audio, DVD-Video, MP3, MPEG4, DivX, WMA, AAC, JPEG | CD-Audio, DVD-Video, MP3, WMA, AAC, JPEG |
| Media | CD-R, CD-RW, VCD, DVD R, DVD RW, iPod | CD-R, CD-RW, VCD, DVD R, DVD RW |
| Decoder | Dolby Digital, DTS | Dolby Digital, DTS |
| Standards support | PAL, NTSC | PAL, NTSC |
| Display | KENWOOD DDX3021 | KENWOOD DDX-6039 |
| Display type | multi-color, touch | multi-color, touch |
| Display dimensions | 136 x 72 mm | 156 x 82 mm |
| Display diagonal | 6.1 inch | 6.95 inch |
| Display format | 16:9 | 16:9 |
| Angle adjustment panel | | yes |
| Adjust backlight brightness | | yes, automatic |
| Adjusting the brightness of the display | | yes, manual |
| Management | KENWOOD DDX3021 | KENWOOD DDX-6039 |
| Infrared remote | yes | yes |
| Joystick on the steering wheel | yes | no |
| Pause when speaking on the phone | yes | yes |
| Search for a folder/file | | yes |
| Auto plants | yes | yes |
| Interfaces | KENWOOD DDX3021 | KENWOOD DDX-6039 |
| Front panel USB | yes | |
| Inputs | USB | composite video |
| Audio input on the front panel | yes | no |
| Outputs | PreAmp front, PreAmp rear, and subwoofer PreAmp | audio, video, composite |
| Connecting the navigation system | yes | |
| Bluetooth Support | no | no |
| Supports rear-view camera | yes | yes |
| Tuner | KENWOOD DDX3021 | KENWOOD DDX-6039 |
| Support band | FM, MW | FM, MW |
| RDS | RDS RDS/EON, RDS, PTY | RDS RDS/EON, RDS, PTY |
| Switching stereo/mono | yes | yes |
| Tuner with long reception | yes | yes |
| Number of preset FM/AM | 18 / 6 | 18 / 6 |
| Additional information | KENWOOD DDX3021 | KENWOOD DDX-6039 |
| Adjusting the voice | yes | yes |
| The number of bands equalizer | 3 | |
| The number of bit DAC | 24 | 24 |
| ID3 tag support | yes | no |
| CD-text | yes | yes |
| Tone compensation | yes | yes |
| Dimensions (WxHxD) | 182x111x163 mm | 178x100x180 mm |
| Weight | 2000 | 2600 g |
