• Amplifier design: Class D
• Channels: 1 (Mono)
  
• Finish: Brushed Silver
• Weight: 2.3 kg
  
• Dimensions: 270 × 150 × 60 mm
  
• Power @ 4Ω mono (14.4V): 400W
  
• Power @ 2Ω mono (14.4V): 700W
  
• Power @ 1Ω mono (14.4V): 1000W
  
• Minimum speaker load: 1Ω
  
• Input sensitivity: 5V to 350 mV
  
• Input impedance @ 1kHz: 20 kΩ
  
• Frequency response (-3 dB): 6 Hz – 32 kHz
  
• THD: 0.02%
  
• S/N (rated power): 104 dB
  
• S/N (CEA-2006, 1W): 78 dBA
  
• Damping factor (20Hz–20kHz): >50
  
• Filter: No
  
• Fuse: 2 × 40A
  
• Protection: Thermal and short circuit

• Clean, stable Class D power delivery that stays controlled when you lean on it.
• Built to keep sounding clear even at high output, with very low distortion.
  
• Wide frequency response for tight low-end control and clean detail up top.
  
• Big output capability (up to 1000W RMS at 1Ω) for serious subwoofer authority.
  
• Compact size makes it easier to install without sacrificing performance.
  
• Easy to match with most head units and DSPs thanks to a wide input sensitivity range.
  
• Protection built in for thermal and short-circuit safety.

• Subwoofer builds needing strong power at 1Ω in a compact amp
• Daily-driver installs where you want high efficiency (Class D) and manageable heat
  
• Systems using a DSP / aftermarket head unit with RCA line-level output

If you’re chasing real output from a mono amp but still care about control and reliability, the 3A1 makes sense. The power ratings are strong for its size, the IRS2092S platform is a known approach for efficient Class D designs, and the compact chassis is easy to place in modern vehicles without compromising the build.