Short answer: the Polk T50. It ranks #152 of 228 floorstanding speakers by sound quality, rated 3.8/5, at $498. The Rockville RockTower 68B ranks #223, rated 2.2/5, at $234.90, $263.10 cheaper, a saving that is not big enough to make up the sound-quality gap.
The Polk T50 is the more accurate, deeper-bass choice. A budget tower with twin woofers and passive radiators that gives pretty deep bass for very little money. Its measured preference score, a predictor of how neutral it sounds, is 4.14 against 0.96 for the Rockville RockTower 68B. Its bass reaches about 47Hz before falling 3dB, against 60.1Hz for the Rockville RockTower 68B. The catch: 5dB peak at 1kHz, 4dB bright top end from 11kHz on up.
Why pick the Rockville RockTower 68B: A very inexpensive three way tower with twin woofers and a dedicated midrange, sold direct with free shipping. The tradeoff: Objective performance is weak: its preference score is only 0.96 without a subwoofer and 3.42 with one, placing it near the bottom of the measured floorstanders.
Buy the Polk T50. It is rated higher for sound quality, and the $263.10 saving on the Rockville RockTower 68B is not enough to make up the difference.
Want more options? Browse the full Passive Home rankings.
Measured Differences
- Bass depth: the Polk T50 reaches 47 Hz (3 dB down) against 60.1 Hz for the Rockville RockTower 68B, about half an octave deeper. You hear more of the lowest bass notes and kick drums.
- Tonal accuracy above the bass: with a subwoofer taking the low end, the Polk T50 scores 6.2 against 3.4 for the Rockville RockTower 68B on the Spinorama preference scale. Its frequency response and off-axis sound are smoother, so voices and instruments sound closer to the recording.
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Specifications Side By Side
| Polk T50 | Rockville RockTower 68B | |
|---|---|---|
| Price | $498 per pair | $234.90 per pair |
| Ranked | #152 of 228 in Large Size Floorstanding Speakers | #223 of 228 in Large Size Floorstanding Speakers |
| Bass Extension (-10dB) | 38Hz (measured, Audio Science Review) | 43.1Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) |
| Bass Extension (-3dB) | 47Hz (measured, Audio Science Review) | 60.1Hz (measured, Erin’s Audio Corner via spinorama.org) |
| Impedance | 4 ohms nominal (4.2 ohms minimum, measured by Audio Science Review) | 8 ohms |
| Drivers | 2x 6.5” bi-laminate paper cone woofers, 1x 1” Terylene dome tweeter + 2x 8” passive bass radiators | 1-inch silk-dome tweeter, 6.5-inch midrange, dual 6.5-inch woofers |
| Weight | 75.4 lbs (34.2 kg) | 55.1 lbs (25.0 kg) each |
| Sensitivity | 86.3dB (2.83V/1m, measured by Audio Science Review) | 87dB |
| Dimensions | 40.4”H x 9.3”W x 12.5”D (1026.2 x 235.0 x 317.5 mm) | 41.7”H x 7.9”W x 10.4”D (1060 x 200 x 265 mm) |
| Woofer Cabinet | passive radiator | - |
| Spinorama Preference Score | 4.14 | 0.96 |
| Spinorama Preference Score with Perfect Sub | 6.15 | 3.42 |
| DIY Kit | No | No |
| Enclosure | - | Passive 3-way vented floorstander |
| Frequency Response | - | 30Hz-20kHz (manufacturer specified) |
| Bass Extension (-6dB) | - | 54Hz (measured, Spinorama) |
| Power Handling | - | 125W RMS / 500W peak |
Where the Ratings Come From
- Polk T50: Spinorama.org measurements and reviews by Audio Science Review.
- Rockville RockTower 68B: Spinorama.org measurements.
This comparison is generated from the ratings, specifications and measurements on each product’s own page, and it updates when that data changes. How we rank explains how each rating is decided.
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