AUDIOFROG A150.4D 4-channel Car Amplifier — 100 watts RMS x 4

Product Description:

The Audiofrog A150.4D is a compact, high-fidelity Class D 4-channel amplifier designed for audiophiles who demand studio-quality sound in a mobile environment. Part of Audiofrog’s “HiFi Class-D” series, it utilizes ultra-high-frequency switching (100kHz power supply / 420kHz modulator) to move noise far beyond the audible range and allow for a significantly smaller footprint. Its Differential Input stage is specifically engineered to reject common-mode noise, making it highly effective at eliminating alternator whine and ground loop interference without sacrificing signal purity.

Product Features:

• Ultra-High Modulation Frequency: By switching at 420kHz, the amplifier moves the output low-pass filter to 40kHz, ensuring a flat frequency response within the audible spectrum regardless of speaker impedance.
• Differential Input Stage: Designed to amplify only the difference between signal conductors, effectively canceling out noise picked up by RCA cables in complex automotive electrical environments.
• Smart Heat Sink Shield: The dual-purpose aluminum housing acts as both a thermal radiator and an EMI (Electromagnetic Interference) shield to protect sensitive low-level signals.
• Flexible Crossover Architecture: Each pair of channels features independent High-Pass, Low-Pass, or Bandpass filters with a 12dB/octave slope, allowing for active 2-way setups or subwoofer integration.
• Versatile Turn-On Modes: Supports standard Remote Turn-on, Signal Sensing (on both line and speaker levels), and 6V DC Offset detection for easy integration with factory head units.
• Four-Layer PCB Design: Optimizes signal routing and grounding to minimize internal interference and maximize current delivery in a compact chassis.