ETON PA4 - 4 Channel Class-D Amplifier

Don’t let the size fool you — the ETON PA4 delivers serious multi-channel performance in one of the smallest amplifier footprints on the market. Compact yet powerful, the PA series combines maximum performance with premium features.

Built around state-of-the-art Advanced Class-D technology, the PA4 offers exceptional efficiency and asymmetrical power distribution for real-world system flexibility. The timeless gunmetal die-cast aluminium housing features a removable cover, integrated adjustment tool, and variable mounting feet for effortless installation — even in tight or overhead locations.

With active filters, adjustable input impedance and voltage, and detachable power and signal connections, the PA4 is perfectly suited for modern vehicles and OEM integration.

Full performance. Minimal size. No compromise.

Power Output

• CH1/2: 2 x 45W RMS @ 4Ω
• CH3/4: 2 x 80W RMS @ 4Ω
• CH3/4: 2 x 140W RMS @ 2Ω
• CH3/4: 1 x 280W RMS bridged @ 4Ω
• Signal-to-Noise Ratio: 78 dB
• Damping Factor @ 4Ω: >65
• THD+N: 0.01% @ 10W / 1kHz

Note: CH1/2 are not 2Ω stable and cannot be bridged. CH3/4 support 2Ω and bridged mode only.

Features

• Asymmetrical Output Design: Tailored to power a wide range of speaker configurations
• Ultra-Compact Size: 128 x 100 x 45 mm — fits behind dashboards, under seats, or in gloveboxes
• Full-Range Active Filters:
  • High-Pass & Low-Pass adjustable from 50–5000 Hz on all channels
• OEM-Ready Integration:
  • Auto Turn-On via Signal/Voltage (SIG / DC)
  • Adjustable high-level input voltage (1–15V / 15–40V)
  • Adjustable input resistance (10 / 150 / 600 Ω)
• Built-In Setup Tools: Removable top cover reveals an integrated tuning tool
• Modular Installation:
  • Detachable connection plugs
  • Variable mounting feet for flexible placement

Installation & Design

• Ultra-compact 4-channel Advanced Class-D amplifier
• Asymmetrical power distribution for flexible system design
• High-quality die-cast aluminium housing with removable cover
• Integrated adjustment tool for easy tuning
• Active crossovers and adjustable input settings
• Ideal for modern vehicles and tight installations