HAMMER TECH ECA475 AMPLIFIER

Entry-Level Amplifier | Class-D Topology | Engineered for Performance

Abstract

The Hammer Tech ECA475 is an entry-level 4-channel Class-D amplifier designed to provide affordable high-fidelity power delivery without compromising on build quality or reliability. By optimizing circuit efficiency and parts selection, Hammer Tech has achieved a balance between cost efficiency and engineering precision, delivering stable output power, flexible integration, and robust protection features in a compact form factor.

Power & Performance

• Topology: Class-D

• Rated RMS Output (14.4V, ≤1% THD+N):
  • 75 W × 4 @ 4Ω
  • 115 W × 4 @ 2Ω
  • 240 W × 2 bridged @ 4Ω

• Frequency Response: 20 Hz – 30 kHz (-3 dB)

• THD+N: <0.2% @ 30 W / 4Ω / 1 kHz

• S/N Ratio:
  • >93 dB (A-weighted) @ rated power
  • >75 dB (CEA-2006) @ 1 W

System Integration

• Input Sensitivity:
  • 0.35–3.5 V (RCA input)
  • 0.7–7 V (Speaker-level input)

• Input Channel Selection: 2CH / 4CH

• Auto Turn-On: DC Offset or Remote trigger

• Operating Voltage Range: 7.5 – 16 V DC

Crossover & Filtering

• Filter Modes: Full Range / HPF / LPF

• Filter Slope: 12 dB/octave

• Frequency Range:
  • HPF: OFF – 300 Hz (Group A)
  • HPF / LPF: 50 – 300 Hz (Group B)

Protection & Reliability

The ECA475 is equipped with comprehensive self-protection circuits:

• Overload Protection

• Short Circuit Protection

• Thermal Overheat Protection

• Under-voltage & Over-voltage Safeguards

Physical Specifications

• Dimensions (L × W × H): 195 × 150 × 46 mm

• Power/Ground Terminals: 2 – 4 AWG compatible

• Fuse Rating: 1 × 50 A

Application

The Hammer Tech ECA475 is engineered for entry-level system upgrades, OEM integration, and budget-conscious builds. Its combination of compact size, stable Class-D power delivery, and installer-friendly features makes it a versatile choice for a wide range of vehicle platforms.

Conclusion

The ECA475 demonstrates Hammer Tech’s philosophy of delivering real engineering value at every tier of the market. By integrating premium design practices into an entry-level price point, this amplifier ensures that first-time enthusiasts and seasoned installers alike can access reliable, clean, and efficient amplification.