Features of the amplifiers:

1. **Efficient performance:**
- Impressive performance without putting too much strain on the battery.

2. **Channels and performance:**
- The 4-/6-/8-channel amplifiers produce 150 watts (eff.) per channel.

3. **Easy-Tune function:**
- The amplifiers use the Easy-Tune function for easy configuration, which automatically controls the sound settings.

4. **Optimized sound:**
- Best sound without having to make manual adjustments.

5. **Minimal distortion and noise:**
- Minimal distortion and avoidance of noise for clear sound reproduction.

6. **LED indicator lights:**
- LED indicator lights for analyzing temperature, short circuit or voltage problems.

These amplifiers not only offer impressive performance and efficiency, but also user-friendly configuration with automatic sound adjustment and monitoring functions for a reliable and optimal audio experience.