| Composition | KENWOOD DDX3021 | KENWOOD DPX-4020 |
| Tuner | has a digital | has a digital |
| Cassette deck | | yes |
| CD players | yes | yes |
| MP3-players | yes | no |
| DVD-player | yes | |
| Blu-ray player | no | no |
| Amplifier | yes | yes |
| Equalizer | yes | yes |
| Navigator | no | no |
| TV tuner | no | |
| General characteristics | KENWOOD DDX3021 | KENWOOD DPX-4020 |
| Nominal and maximum power | 4x30 W/4x50 W | 4x22 W/4x47 W |
| Management changer | CD | CD |
| CD-changer interface is | custom | custom |
| Size | 2 DIN | |
| Color | black | |
| Supported carriers and formats | KENWOOD DDX3021 | KENWOOD DPX-4020 |
| Formats | CD-Audio, DVD-Video, MP3, MPEG4, DivX, WMA, AAC, JPEG | CD-Audio |
| Media | CD-R, CD-RW, VCD, DVD R, DVD RW, iPod | cassette |
| Decoder | Dolby Digital, DTS | |
| Standards support | PAL, NTSC | |
| Display | KENWOOD DDX3021 | KENWOOD DPX-4020 |
| Display type | multi-color, touch | multicolor |
| Adjust backlight brightness | | yes, automatic |
| Display dimensions | 136 x 72 mm | |
| Display diagonal | 6.1 inch | |
| Display format | 16:9 | |
| Cassette deck | KENWOOD DDX3021 | KENWOOD DPX-4020 |
| Auto tape | | yes |
| Noise reduction | | DolbyB |
| Auto reverse | | yes |
| To search for music on cassette | | yes |
| Skip pause on the tape | | yes |
| Management | KENWOOD DDX3021 | KENWOOD DPX-4020 |
| Multicolor lighting | | yes |
| Infrared remote | yes | yes |
| Joystick on the steering wheel | yes | no |
| Pause when speaking on the phone | yes | yes |
| Memory disk names | | yes |
| Auto plants | yes | |
| Interfaces | KENWOOD DDX3021 | KENWOOD DPX-4020 |
| Outputs | PreAmp front, PreAmp rear, and subwoofer PreAmp | audio |
| Inputs | USB | |
| Connecting the ISO | | yes |
| Front panel USB | yes | |
| Gold-plated connectors | | yes |
| Audio input on the front panel | yes | |
| Bluetooth Support | no | |
| Supports rear-view camera | yes | |
| Connecting the navigation system | yes | |
| Protection | KENWOOD DDX3021 | KENWOOD DPX-4020 |
| Detachable panel | | yes |
| Tuner | KENWOOD DDX3021 | KENWOOD DPX-4020 |
| Support band | FM, MW | FM, MW, LW |
| RDS | RDS RDS/EON, RDS, PTY | RDS |
| Switching stereo/mono | yes | |
| Tuner with long reception | yes | |
| Number of preset FM/AM | 18 / 6 | |
| Additional information | KENWOOD DDX3021 | KENWOOD DPX-4020 |
| Super-bass | | yes |
| Adjusting the voice | yes | yes |
| Disabling voices | | yes |
| Single-bit DAC architecture | | yes |
| CD-text | yes | yes |
| Resampling audio | | 8 |
| Tone compensation | yes | yes |
| The number of bit DAC | 24 | |
| Dimensions (WxHxD) | 182x111x163 mm | 180x100x160 mm |
| The number of bands equalizer | 3 | |
| Features | | Sleep timer (20/40/60 min). Possibility to change the button illumination. Calendar with memory. System of memorizing the audio settings. Playback of CD-R/RW discs. Tape counter. |
| ID3 tag support | yes | |
| Weight | 2000 | |
