1. Up to 85% efficiency thanks to ADC (Advanced D-Class) output stage

2. USS (Universal Speakers Simulators) allows SP 4.900 to work with head units

featuring the “speaker load detection” circuit

3. 160 x 4 (4 Ω) with ultra-compact size (211,6 x 130 mm)

4. IP55 aluminum chassis for maximum protection against humidity and external agents

5. No cooling fan to prevent internal accumulation of dirt

6. Sealed power cord, line inputs, and speaker outputs to prevent oxidation

7. Crossovers filters and controls on a single side to facilitate calibration when the product is installed