Short answer: the Polk Audio XT60. It ranks #59 of 73 floorstanding speakers by sound quality, rated 3.5/5, at $458. The Rockville RockTower 68B ranks #72, rated 2.2/5, at $234.90, $223.10 cheaper, a saving that is not big enough to make up the sound-quality gap.
What the Polk Audio XT60 does well: Passive-radiator-loaded design (6.5” woofer plus two 6.5” passive radiators) gives deeper bass than the driver size alone would suggest: 43.9Hz at -3dB / 38.1Hz at -10dB, genuinely competitive extension for a budget tower. The catch: Bass alignment Q (lfq 0.96) is the highest, least-controlled figure in this entire batch, consistent with owner reports of a slightly loose, boomy low end at higher volumes.
What the Rockville RockTower 68B does well: An unusually inexpensive current 3-way tower with dual 6.5-inch woofers, a dedicated 6.5-inch midrange and silk-dome tweeter. 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.
Specifications Side By Side
| Polk Audio XT60 | Rockville RockTower 68B | |
|---|---|---|
| Price | $458 per pair | $234.90 per pair |
| Ranked | #59 of 73 in Large Size Floorstanding Speakers | #72 of 73 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 |
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Prices on this page were last checked September 29, 2026 at 3:43 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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The Two Speakers In Full
Polk Audio XT60: $458 per pair Amazon B&H Photo Video Crutchfield eBay
Pros: Passive-radiator-loaded design (6.5” woofer plus two 6.5” passive radiators) gives deeper bass than the driver size alone would suggest: 43.9Hz at -3dB / 38.1Hz at -10dB, genuinely competitive extension for a budget tower. Hi-Res Audio certified, Dolby Atmos/DTS:X compatible, and works with either 4- or 8-ohm amplifier outputs. Measured bass extension of 43.9Hz (-3dB).
Cons: Bass alignment Q (lfq 0.96) is the highest, least-controlled figure in this entire batch, consistent with owner reports of a slightly loose, boomy low end at higher volumes. On-axis response is also relatively uneven, with narrow-band deviation of about 0.51dB. The vinyl-wrapped (not wood veneer) cabinet reads as budget up close per owner reviews, and at least one owner reported blowing a driver under sustained heavy bass: some caution is warranted with bass-heavy source material at volume.
Full Polk Audio XT60 review and specifications →
| Bass Extension (-10dB) | 38.1Hz (measured, spinorama.org) |
|---|---|
| Bass Extension (-3dB) | 43.9Hz (measured, spinorama.org) |
| DIY Kit | No |
| Dimensions | 19.05 x 92.5 x 23.09cm (7.5 x 36.4 x 9.09 in) each |
| Drivers | 1” Terylene dome tweeter, 6.5” bilaminate polypropylene woofer, 2x 6.5” passive radiators |
| Impedance | 4/8-ohm compatible |
| Sensitivity | 86dB (1W/1m) |
| Spinorama Preference Score | 5.19 |
| Spinorama Preference Score with Perfect Sub | 7.13 |
| Weight | 20 lbs (9.07 kg) each |
| Woofer Cabinet | Passive radiator-loaded |
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Rockville RockTower 68B: $234.90 per pair Amazon Rockville eBay
Pros: An unusually inexpensive current 3-way tower with dual 6.5-inch woofers, a dedicated 6.5-inch midrange and silk-dome tweeter. Erin’s high-quality Spinorama data measures useful 54Hz extension, and the manufacturer sells each tower directly with free shipping. Measured bass extension of 60.1Hz (-3dB).
Cons: 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. The large cabinet is lightly priced and specified sensitivity is only 87dB despite the multi-driver layout.
Full Rockville RockTower 68B review and specifications →
| Bass Extension (-10dB) | 43.1Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) |
|---|---|
| Bass Extension (-3dB) | 60.1Hz (measured, Erin’s Audio Corner via spinorama.org) |
| Bass Extension (-6dB) | 54Hz (measured, Spinorama) |
| DIY Kit | No |
| Dimensions | 41.7”H x 7.9”W x 10.4”D (1060 x 200 x 265 mm) |
| Drivers | 1-inch silk-dome tweeter, 6.5-inch midrange, dual 6.5-inch woofers |
| Enclosure | Passive 3-way vented floorstander |
| Frequency Response | 30Hz-20kHz (manufacturer specified) |
| Impedance | 8 ohms |
| Power Handling | 125W RMS / 500W peak |
| Sensitivity | 87dB |
| Spinorama Preference Score | 0.96 |
| Spinorama Preference Score with Perfect Sub | 3.42 |
| Weight | 55.1 lbs (25.0 kg) each |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons