JBL Project K2 S9800 Review: Ranked #124 of 163

Last updated: October 7, 2026

The JBL Project K2 S9800 ranks #124 out of 163 total Large Size Floorstanding Speakers for sound quality. See all Passive Home rankings for every top pick.

Brand: JBL

Prices on this page were last checked October 6, 2026 at 10:23 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.

As an eBay Partner, we may be compensated if you make a purchase.

JBL Project K2 S9800 - ranked #124 of 163 Large Size Floorstanding Speakers · Editor's rating 3.8/5

#124 JBL Project K2 S9800: $30,000 per pair Discontinued eBay

Pros: A three-way horn tower with a 15” woofer and 435Be and 045Be beryllium compression drivers on SonoGlass horns, reaching 50kHz. Measurements show a preference score of 4.73 that reaches 6.43 with an ideal subwoofer, with 0.56 listening window deviation. Measured bass extension of 57.2Hz (-3dB).

Cons: The on-axis response is uneven (0.93 average deviation). JBL no longer makes it. Bass reaches 57.2Hz (-3dB) and about 34Hz (-10dB). That data is low quality. Discontinued.

How it compares: Just above it: MartinLogan Motion F10 - $13880 cheaper. Just below it: JBL LS80 - $13500 cheaper.

Bass Extension (-10dB)about 34.4Hz (measured, third-party data via spinorama.org)
Bass Extension (-3dB)57.2Hz (measured, third-party data via spinorama.org)
DIY KitNo
Drivers15” woofer, 435Be and 045Be beryllium compression drivers on SonoGlass horns
Spinorama Preference Score4.73
Spinorama Preference Score with Perfect Sub6.43

More JBL speakers →