| Composition | KENWOOD KMM-257 | JVC KD-R426 |
| Tuner | has a digital | has a digital |
| CD players | no | yes |
| MP3-players | yes | yes |
| DVD-player | no | no |
| Blu-ray player | no | no |
| Amplifier | yes | yes |
| Equalizer | yes | yes |
| Navigator | no | no |
| TV tuner | no | no |
| General characteristics | KENWOOD KMM-257 | JVC KD-R426 |
| Maximum power | | 4x50 W |
| Nominal and maximum power | 4x30 W/4x50 W | |
| Size | 1 DIN | 1 DIN |
| CD-changer interface is | no | no |
| Color | black | black |
| Supported carriers and formats | KENWOOD KMM-257 | JVC KD-R426 |
| Formats | MP3, WMA, AAC, FLAC | CD Audio, MP3, WMA |
| Media | iPod | CD-R, CD-RW |
| Display | KENWOOD KMM-257 | JVC KD-R426 |
| Display type | monochrome | monochrome |
| Management | KENWOOD KMM-257 | JVC KD-R426 |
| Infrared remote | no | yes |
| Joystick on the steering wheel | it is possible to connect | no |
| Search for a folder/file | yes | yes |
| Auto plants | yes | yes |
| Interfaces | KENWOOD KMM-257 | JVC KD-R426 |
| Inputs | USB | USB |
| Audio input on the front panel | yes | yes |
| Front panel USB | yes | |
| Outputs | audio | Subwoofer PreAmp |
| Bluetooth Support | no | no |
| Protection | KENWOOD KMM-257 | JVC KD-R426 |
| Detachable panel | | yes |
| Tuner | KENWOOD KMM-257 | JVC KD-R426 |
| Support band | FM, MW, LW | FM, MW |
| RDS | RDS RDS/EON, RDS, PTY | |
| Tuner with long reception | yes | yes |
| Switching stereo/mono | yes | |
| Number of preset FM/AM | 18 / 3 | 18 / 6 |
| Additional information | KENWOOD KMM-257 | JVC KD-R426 |
| Adjusting the voice | yes | yes |
| The number of bit DAC | | 24 |
| ID3 tag support | yes | yes |
| CD-text | | yes |
| Tone compensation | yes | yes |
| Dimensions (WxHxD) | 182x53x107 mm | 182x52x160 mm |
| Weight | 640 g | |
