Short answer: the Polk T50. It ranks #54 of 73 floorstanding speakers by sound quality, rated 3.8/5, at $498. The Rockville RockTower 68B ranks #72, rated 2.2/5, at $234.90, $263.10 cheaper, a saving that is not big enough to make up the sound-quality gap.
What the Polk T50 does well: Pretty deep bass for the price. The tradeoff: 5dB peak at 1kHz, 4dB bright top end from 11kHz on up.
Why pick the Rockville RockTower 68B: An unusually inexpensive current 3-way tower with dual 6.5-inch woofers, a dedicated 6.5-inch midrange and silk-dome tweeter. 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.
Specifications Side By Side
| Polk T50 | Rockville RockTower 68B | |
|---|---|---|
| Price | $498 per pair | $234.90 per pair |
| Ranked | #54 of 73 in Large Size Floorstanding Speakers | #72 of 73 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 |
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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 T50: $498 per pair Amazon eBay
Pros: Pretty deep bass for the price. Distortion at 86dB SPL/1m is reasonably controlled outside a narrow spike around 250Hz. The reviewer notes performance is “not too bad for a budget speaker” once the two main tonal issues are addressed with EQ. Measured bass extension of 47Hz (-3dB), with a measured sensitivity of 86.3dB.
Cons: 5dB peak at 1kHz, 4dB bright top end from 11kHz on up. Just okay vertical off axis. Impedance and phase show several resonances between 200Hz-1kHz, with a minimum impedance of 4.2 ohms. Distortion rises substantially at 96dB SPL/1m across the midrange, with repeated peaks between 100Hz-2kHz.
Full Polk T50 review and specifications →
| Bass Extension (-10dB) | 38Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 47Hz (measured, Audio Science Review) |
| DIY Kit | No |
| Dimensions | 40.4”H x 9.3”W x 12.5”D (1026.2 x 235.0 x 317.5 mm) |
| Drivers | 2x 6.5” bi-laminate paper cone woofers, 1x 1” Terylene dome tweeter + 2x 8” passive bass radiators |
| Impedance | 4 ohms nominal (4.2 ohms minimum, measured by Audio Science Review) |
| Sensitivity | 86.3dB (2.83V/1m, measured by Audio Science Review) |
| Spinorama Preference Score | 4.14 |
| Spinorama Preference Score with Perfect Sub | 6.15 |
| Weight | 75.4 lbs (34.2 kg) |
| Woofer Cabinet | passive radiator |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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