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Skar Audio RP-75.4AB 4-Channel Car Amplifier

Skar Audio ★ 4.0/5 · ItemOracle Score Mid-Range

$153 USD
Price subject to change
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Skar Audio RP-75.4AB 500 Watt Full-Range Class A/B 4 Channel Car Amplifier

Compact 4-channel car amplifier with 500-watt MOSFET Class A/B output, adjustable filters, and protection circuitry. Users report strong power and clear sound, with concerns about heat and durability over time

Highlights

  • 4-channel RMS 75W x4 at 4 ohms
  • gain, LPF, HPF controls
  • bass EQ switch and protection

Pros

  • powerful 4-channel output
  • adjustable gain, LPF, HPF
  • bass EQ switch
  • compact size
  • 4-way protection circuitry

Cons

  • can get very hot at 2 ohms
  • durability concerns with some units failing weeks after purchase

Best For

  • bridging for multi-sub setups
  • daily driving audio systems
  • compact install in small vehicles
  • custom sound systems with 4-channel configuration
  • audio upgrades for mid-size cars
  • systems needing adjustable bass boost

Features

  • 4-channel car amplifier with 500-watt MOSFET power
  • RMS: 125W x 4 at 2 ohms, 75W x 4 at 4 ohms
  • User-adjustable gain, LPF, HPF, and Bass EQ switch (0, +6, +12 dB)
  • 4-ways protection circuitry for reliability
  • Frequency response 20 Hz–20 kHz; SNR 105 dB

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