H YANKA 8-inch Underseat Powered Car Subwoofer 400W

The H YANKA SODA-08ASW is a slim underseat powered subwoofer that delivers deep low frequencies with a built-in amplifier for quick, space-saving car audio upgrades.

Small enough to fit beneath most vehicle seats, the SODA-08ASW combines an 8-inch, 4-ohm driver with a compact 400W peak (100W RMS) amplifier to give your car, truck, or Jeep noticeably fuller bass without bulky enclosures or external amps. It’s designed for easy installation, flexible inputs, and precise tone shaping so you can add controlled low end to factory or aftermarket systems while keeping cabin space usable.

How does this subwoofer improve my in-car listening?

This unit fills in low frequencies that small speakers typically can’t reproduce, making music sound more balanced and impactful. With a frequency response down to 20Hz, it reproduces deep bass notes while the low THD and high SNR preserve clarity.

• 20Hz–150Hz frequency range for true low-end extension
• THD <0.5% and SNR >90dB for cleaner bass
• Bass Boost (0 to +12dB) to emphasize low frequencies
• Compact underseat form factor for space-efficient installation

Will it work with my factory stereo or aftermarket head unit?

The SODA-08ASW supports both high- and low-level inputs, so it integrates easily with factory radios and aftermarket head units. You can connect via speaker-level leads if your car lacks RCA outputs, or use low-level RCA connections when available.

• High- and low-level input options for wide compatibility
• Built-in amp removes need for an external amplifier
• 20A fuse protection for safer installs with factory wiring
• Compact dimensions (270 x 200 x 79mm) fit under most seats

How can I tune the bass to suit different music and seats?

The onboard controls let you dial in the subwoofer to match music styles and vehicle acoustics. Use the adjustable low-pass filter and bass boost to control fullness, and the subsonic filter to block inaudible rattles and protect the driver.

• Low-pass filter adjustable from 50Hz to 150Hz for crossover precision
• Bass boost range 0 to +12dB for added impact when needed
• Subsonic filter at 20Hz to prevent excessive, inaudible excursion
• Precision controls for blending with door and dash speakers

Is installation difficult and what should I expect?

Installation is straightforward for anyone comfortable with basic wiring: place the unit under a seat, connect power, ground, and signal, and secure it. The built-in amplifier and small footprint reduce components and simplify routing than using a separate amp and enclosure.

• Plug-and-play friendly with built-in amplifier
• Includes 20A fuse for in-line power protection
• Compact footprint minimizes trimming or custom brackets
• Compatible with both left- and right-side underseat placements

Who is this for: The H YANKA SODA-08ASW is ideal for drivers who want meaningful bass without losing interior space — commuters, small-car owners, and anyone upgrading a factory audio system. It’s also well suited to Jeep and truck owners who require a low-profile solution under seats or behind panels. If you need cleaner, deeper low end with flexible hookup options and simple installation, this slim powered subwoofer offers a compact, controllable upgrade.