| Brand | Alpine |
| Trade name | R-A90S |
| Model line-up | 2021 year |
| Type | car amplifier |
| Channels | six-channel |
| Rated power (4 Ohm) | 900 |
| Power of channel 1 (4 Ohm) | 75 |
| Power of channel 2 (4 Ohm) | 75 |
| Power of channel 3 (4 Ohm) | 75 |
| Power of channel 4 (4 Ohm) | 75 |
| Power of channel 5 (4 Ohm) | 150 |
| Power of channel 6 (4 Ohm) | 150 |
| Ability to work at 2 Ohms | + |
| Frequency range from | 10 Hz |
| Frequency range up to | 45000 Hz |
| Amplifier class | D |
| Warranty / Service | 12 months |
| Price per | pcs |