The Polk Audio Signature S15 ranks #46 out of 122 total Medium Size Bookshelf Speakers for sound quality. See all Passive Home rankings for every top pick.
Brand: Polk
Prices on this page were last checked October 5, 2026 at 10:21 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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#46 Polk Audio Signature S15: $229 per pair Discontinued eBay
Newer model: the Polk Signature Elite ES15, ranked lower, rated 3.5/5.
Pros: A budget two-way with a 5.25” mica-reinforced polypropylene woofer and 1” tweeter, rated at 88dB. Audio Science Review measured wide horizontal coverage (about ±60 degrees) and a preference score that reaches 6.90 with an ideal subwoofer. Measured bass extension of 67.4Hz (-3dB).
Cons: On-axis response is uneven (0.94dB average deviation) and directivity varies across frequency (3.92dB directivity index deviation), for a preference score of 4.29. Bass rolls off at 67.4Hz (-3dB). Replaced by the Signature Elite ES15. Discontinued.
How it compares: Just above it: DALI Spektor 1 - $21 more, 5Hz lower bass extension (-3dB). Just below it: Neumi Silk 4 - $29 cheaper, 5.4Hz lower bass extension (-3dB).
| Bass Extension (-10dB) | about 53.2Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 67.4Hz (measured, Audio Science Review) |
| DIY Kit | No |
| Dimensions | 12”H x 7.5”W x 10.2”D (305 x 191 x 260 mm) |
| Drivers | 1” tweeter, 5.25” polypropylene woofer |
| Frequency Response | 50Hz-40kHz (manufacturer specified) |
| Sensitivity | 88dB (manufacturer specified) |
| Spinorama Preference Score | 4.29 |
| Spinorama Preference Score with Perfect Sub | 6.90 |
| Weight | 13 lbs (5.9 kg) each |
| Woofer Cabinet | ported |
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