Short answer: the Polk Audio XT60. It ranks #178 of 228 floorstanding speakers by sound quality, rated 3.5/5, at $458. The Rockville RockTower 68B ranks #223, rated 2.2/5, at $234.90, $223.10 cheaper, a saving that is not big enough to make up the sound-quality gap.
The Polk Audio XT60 is the more accurate, deeper-bass pick. A budget tower with a woofer and two passive radiators that gives surprisingly deep bass for the price. Its measured preference score, a predictor of how neutral it sounds, is 5.19 against 0.96 for the Rockville RockTower 68B. Its bass reaches about 43.9Hz before falling 3dB, against 60.1Hz for the Rockville RockTower 68B. The tradeoff: Bass alignment Q (lfq 0.96) is an unusually high, underdamped figure for a tower speaker, consistent with owner reports of a slightly loose, boomy low end at higher volumes.
What the Rockville RockTower 68B does well: A very inexpensive three way tower with twin woofers and a dedicated midrange, sold direct with free shipping. Watch for: 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 Audio XT60. It is rated higher for sound quality, and saving $223.10 with the Rockville RockTower 68B does not make up for the sound-quality gap.
Looking for alternatives? See the complete Passive Home rankings.
Measured Differences
- Bass depth: the Polk Audio XT60 reaches 43.9 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 Audio XT60 scores 7.1 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 Audio XT60 | Rockville RockTower 68B | |
|---|---|---|
| Price | $458 per pair | $234.90 per pair |
| Ranked | #178 of 228 in Large Size Floorstanding Speakers | #223 of 228 in Large Size Floorstanding Speakers |
| Bass Extension (-10dB) | 38.1Hz (measured, spinorama.org) | 43.1Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) |
| Bass Extension (-3dB) | 43.9Hz (measured, spinorama.org) | 60.1Hz (measured, Erin’s Audio Corner via spinorama.org) |
| Impedance | 4/8-ohm compatible | 8 ohms |
| Sensitivity | 86dB (1W/1m) | 87dB |
| Drivers | 1” Terylene dome tweeter, 6.5” bilaminate polypropylene woofer, 2x 6.5” passive radiators | 1-inch silk-dome tweeter, 6.5-inch midrange, dual 6.5-inch woofers |
| Weight | 20 lbs (9.07 kg) each | 55.1 lbs (25.0 kg) each |
| Woofer Cabinet | Passive radiator-loaded | - |
| Dimensions | 19.05 x 92.5 x 23.09cm (7.5 x 36.4 x 9.09 in) each | 41.7”H x 7.9”W x 10.4”D (1060 x 200 x 265 mm) |
| Spinorama Preference Score | 5.19 | 0.96 |
| Spinorama Preference Score with Perfect Sub | 7.13 | 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 Audio XT60: Spinorama.org measurements.
- 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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