The Polk Audio RT15i ranks #124 out of 158 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 7, 2026 at 9:25 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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#124 Polk Audio RT15i: $240 per pair Discontinued eBay
Pros: A budget two-way bookshelf from Polk’s RTi line. Polk’s data shows a fairly flat on-axis response (0.39 average deviation). Polk Audio’s measurements show a preference score of 2.95 that reaches 5.51 with an ideal subwoofer, with 0.65 listening window deviation.
Cons: Bass reaches only 76Hz (-3dB). Polk discontinued it. Bass reaches 76.1Hz (-3dB) and about 50Hz (-10dB). That data is of unknown quality.
How it compares: Just above it: NHT SB2 - $280 more. Just below it: JBL Northridge N28.
| Bass Extension (-10dB) | about 49.9Hz (measured, manufacturer data via spinorama.org) |
|---|---|
| Bass Extension (-3dB) | 76.1Hz (measured, manufacturer data via spinorama.org) |
| DIY Kit | No |
| Drivers | 5.25” woofer, 1” dome tweeter |
| Spinorama Preference Score | 2.95 |
| Spinorama Preference Score with Perfect Sub | 5.51 |
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