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Kenwood KSC-PSW88 8-inch car subwoofer 700W (280W RMS)
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Kenwood KSC-PSW88, an 8-inch active underseat car subwoofer with a maximum power output of 700W (280W RMS).Key Features
- Size & Design: Compact 8-inch slim profile built to fit neatly underneath a vehicle seat.
- Power Output: 700W peak max power paired with an integrated Class-D amplifier (approx. 280W RMS).
- Control: Includes a wired remote controller to easily adjust volume levels and frequency crossover.
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Kenwood KSC-PSW88 is a slim powered 8″ under-seat car subwoofer (active enclosure + built-in amp). It’s the newer successor to the older KSC-PSW8 (that one was 150W RMS / 250W peak). Your numbers match the PSW88: 700W max / about 280W RMS.
Kenwood lists it in Asia / Australia / NZ “Bass Solutions” ranges; the older PSW8 is what most US/EU sites still document.
Specs (KSC-PSW88)
Driver 8″ Power 700W max (~280W RMS on some dealer sheets; China Kenwood page also lists 150W rated) Frequency 20 Hz – 180 Hz Sensitivity >90 dB THD <1% LPF 50–150 Hz Bass boost 0–12 dB Subsonic 20 Hz fixed Inputs RCA (low) + speaker-level (high) Turn-on Signal-sensing Remote Wired level / EQ / freq / phase (~4 m cable) Current ~21.5 A (plan a proper fuse and power wire) Size 289 × 215 × 72 mm Weight ~3.6 kg Fits under most front seats. Sealed, low-profile box — bass is tighter “factory upgrade” punch, not a boot 12″ slam.
Install notes
- Run a dedicated power + ground (this draws far more than the old 10 A PSW8).
- High-level inputs work on a stock head unit; RCA is cleaner if you have an aftermarket deck.
- Set LPF around 80 Hz to start, then blend with the doors; flip phase if bass cancels.
- Don’t expect nightclub SPL from 72 mm of height.
vs old KSC-PSW8
PSW8: 250W peak / 150W RMS, 35–150 Hz, ~350 × 240 × 75 mm, aluminum chassis.
PSW88: more peak power, bass boost, wider claimed bandwidth, slightly different footprint.



