Alpine PDX-F4 4/3/2 Channel Power Density Digital Amplifier

New Reference Grade Output Stage

Low Impedance Stability
These amps are stable at low impedances and are capable of their rated power from 2 to 4 ohms for all models. This allows excellent flexibility with multiple speaker and subwoofer loads and is adjusted automatically.
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General

•     Power Requirements: 14.4V DC (11V to 16V)
•     Input Sensitivity: 0.2V to 4.0V (For Rated Power)
•     Cable size: 25 mm² (BATT and GND), 4 mm² (Remote), Up to 10 mm² (Speaker)
•     Frequency Response: 5 Hz - 100 kHz / 0dB ~ -3dB (Reference: 1 W into 4 ?)
•     Speaker Impedance: 4 or 2 ?
•     Signal to Noise: CEA 2006 S/N Ratio (IHF A Weighted, Reference: 1W into 4?) 98 dBA