Rockville RW8CA 8ft 600W Low Profile Under-Seat Active Car Subwoofer

In this review of the Rockville RW8CA, the bottom line is simple: it is a compact under-seat solution for drivers who want noticeably deeper bass without sacrificing cabin space. The RW8CA combines an 8' sealed subwoofer and a built-in amplifier rated at 150 watts RMS (600 watts peak) into a 2.7' slim enclosure that tucks under most seats, and the biggest reason to buy is its easy installation options - including high level inputs with auto turn-on - which let it integrate cleanly with factory or aftermarket radios.

Key Features

• Compact sealed enclosure: The 2.7' thin enclosure fits under most vehicle seats while preserving trunk and cabin room.
• Built-in amplifier: A PWM MOSFET power supply and monoblock output provide 150 watts RMS at 2 ohms for consistent low-frequency output without a separate amp.
• Flexible inputs: Low level RCA and high level inputs with auto turn-on simplify wiring to either aftermarket or factory head units.
• Adjustable tuning: Low pass filter (50Hz-150Hz), phase switch (0/180), and 0-18dB bass boost at 45Hz let users tailor the bass to their vehicle and preferences.
• Protection circuits: Built-in thermal, short and overload protection help protect the amplifier and speaker during heavy use.
• Remote control: A wired subwoofer level remote and soft delayed remote turn-on make on-the-fly level adjustments easy from the driver seat.

Who It's For

The RW8CA is aimed at drivers who need more bass but have limited space: commuters, small-cabin cars, and anyone who wants a tidy under-seat install without a bulky enclosure or separate amp. It fits well for users who prefer a sealed, tight bass response rather than booming ported lows.

It is less suited for people who demand very high SPL or deep extension below 30Hz from large ported systems, or for installers who need vehicle-specific pre-fabricated enclosures. Buyers seeking extreme low-end output should consider larger subwoofers or dedicated ported enclosures instead.

Pros & Cons

Pros

• Very slim 2.7' profile makes installation under seats straightforward in many vehicles.
• Integrated amplifier simplifies wiring and avoids the need for a separate amp and enclosure.
• Multiple tuning options and a remote level control provide good flexibility for different cars and music.
• Auto turn-on via high level inputs makes hook-up to factory radios hassle-free.

Cons

• 150 watts RMS is adequate but not aimed at extreme SPL enthusiasts who want very loud or ultra-low bass.
• The sealed 8' design favors tight impact over very deep extension below the subsonic filter at 29Hz.

Specifications

Speaker Size	8' (RW8CA)
Power	600W peak / 150W RMS
Amplifier Output	150W RMS monoblock at 2 ohms, 1% THD+N
Frequency Response	20Hz - 150Hz
Dimensions (L x W x H)	12.4 x 11 x 2.7 in
Controls	Low pass 50Hz-150Hz, Bass boost 0-18dB @45Hz, Phase 0/180

Our Verdict

The Rockville RW8CA is a practical, well-rounded under-seat subwoofer for drivers who want improved bass without complex installation or loss of space. Its built-in amp, flexible inputs, and compact sealed design deliver controlled, musical bass that represents good value for anyone upgrading from factory speakers; those chasing extreme low-end or maximum SPL will want a larger, dedicated system.

Frequently Asked Questions

Will this fit under my car seat?
Most compact and mid-size vehicle seats will accommodate the 2.7' height, but confirm your seat clearance against the 12.4 x 11 x 2.7 in dimensions before purchasing.

Do I need a separate amplifier?
No, the RW8CA has a built-in amplifier rated at 150W RMS, so no external amp is required for standard installs.

Can I use the factory radio to trigger it?
Yes, high level inputs with auto turn-on detect an audio signal and will switch the unit on and off without a remote turn-on wire.