Klipsch Flexus Sub 100 Review: Ranked #16 of 49

Last updated: September 12, 2026

The Klipsch Flexus Sub 100 ranks #16 out of 49 total Small Home Subwoofers (Under 30 lbs) for sound quality. See all Subwoofers rankings for every top pick.

Brand: Klipsch

Prices on this page were last checked September 12, 2026 at 8:55 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.

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#16 Klipsch Flexus Sub 100: $349.00 Amazon eBay

Pros: Independent CEA-2010 testing records 90.2 dB at 20 Hz and 109.1 dB (avg of 3/4 bands) through 40-80 Hz. The sealed enclosure with a 10” driver suits a small room.

Cons: Only works with Klipsch Flexus soundbars, not as a standalone LFE sub. The 339.9H x 335.0W x 349.2D mm cabinet and 9.4 kg mass still need deliberate placement.

How it compares: Just above it: OSD (Optimal Speaker Design) SS8 - $100 cheaper, 1.9dB more max output. Just below it: Polk Audio PSW10 - $140 cheaper, 1.2dB more max output.

CEA-2010-A Average (40-80Hz)109.1 dB (avg of 3/4 bands)
Dimensions13.4"H x 13.2"W x 13.7"D (339.9 x 335.0 x 349.2 mm)
Drivers10" (254mm) driver
Enclosuresealed
Measurement SourceBrent Butterworth
Output SPL at 20 Hz90.2 dB
Output SPL at 25 Hz96.7 dB
Output SPL at 31.5 Hz101.2 dB
Output SPL at 40 Hz105.9 dB
Output SPL at 50 Hz109.0 dB
Output SPL at 63 Hz112.4 dB
Warranty2/5
Weight20.7 lbs / 9.4 kg

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