The DD Audio SS9000 is a compact, high-power, full-range Class D monoblock car audio amplifier manufactured by Digital Designs (DD Audio).
Key Specifications & Power Output
• Type: Full-bridge hybrid monoblock amplifier
• RMS Power Output (at 14.4V test voltage):
• 3,000 Watts RMS at 4 Ohms
• 6,000 Watts RMS at 2 Ohms
• 9,000 Watts RMS at 1 Ohm
• Power Supply: Six-pack (sextuple) toroidal transformer design with oversized capacitors
• Frequency Response: 20 Hz – 20 kHz (full-range capability for subwoofers or pro-audio speaker/stunt walls)
• Crossover Filters:
• Sub-Sonic Filter: 20 Hz – 80 Hz (12 dB/Oct)
• Low-Pass Filter: 80 Hz – 20 kHz (12 dB/Oct)
• Signal-to-Noise Ratio (S/N): >95 dB
• Total Harmonic Distortion (THD): <1.0%
• Max Current Draw: 900 Amps
• Wire Gauges: Dual 0 AWG power terminals and 4 AWG speaker terminals
• Dimensions: 15.7" × 7.3" × 2.4" (398 × 185 × 60 mm)
Design Highlights
• Hybrid Architecture: Combines full-bridge efficiency with high-current devices typically found in half-bridge amps, lowering the noise floor and improving high-frequency speed.
• Compact Footprint: Engineered to pack 9,000 watts into a dense, heavy-duty aluminum chassis featuring thick sidewalls and extended heatsink fins.
• Power Requirements: Due to the extreme power density, short runs of pure Oxygen-Free Copper (OFC) power cabling are strongly recommended over Copper-Clad Aluminum (CCA).
Digital Designs 
