Short answer: the Klipsch RP-5000F II. It ranks #46 of 73 floorstanding speakers by sound quality, rated 4.0/5, at $1,199.98. The Monolith THX-365T ranks #48, rated 3.9/5, at $900, $299.98 cheaper, which does not close the gap in sound quality.
Why pick the Klipsch RP-5000F II: The most tonally coherent of the RP II floorstander line, with a mild baffle-step dip and treble tilt but no additional coloration issues beyond that. The tradeoff: Bass extension is underwhelming for a floorstander (F3 at 55Hz, F10 at 41Hz) and needs a subwoofer.
Why pick the Monolith THX-365T: The coaxial midrange/tweeter produces coherent horizontal and vertical coverage through most of the vocal band, while twin 6.5-inch woofers deliver good 88.6dB measured sensitivity. The catch: Erin measured F3 at 84Hz (F10 roughly 40Hz), so it categorically needs a subwoofer.
Buy the Klipsch RP-5000F II. It is rated higher for sound quality, and saving $299.98 with the Monolith THX-365T does not make up for the sound-quality gap.
Want more options? Browse the full Passive Home rankings.
Specifications Side By Side
| Klipsch RP-5000F II | Monolith THX-365T | |
|---|---|---|
| Price | $1,199.98 per pair | $900 per pair |
| Ranked | #46 of 73 in Large Size Floorstanding Speakers | #48 of 73 in Large Size Floorstanding Speakers |
| Bass Extension (-10dB) | 41Hz (measured, Erin’s Audio Corner) | ~40Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 55Hz (measured, Erin’s Audio Corner) | 84Hz (measured, Erin’s Audio Corner) |
| Sensitivity | 90dB (2.83V/1m, measured by Erin’s Audio Corner) | 88.6dB/2.83V/1m (measured, Erin’s Audio Corner) |
| Drivers | 1” titanium tweeter with Tractrix horn, dual 5.25” cerametallic woofers | Dual 6.5-inch woofers; 2-inch coaxial midrange/1-inch dome; 5.25-inch Atmos coaxial |
| Weight | 38.6 lbs (17.5 kg) | 28.4 lbs (12.9 kg) each |
| Impedance | 8 ohms nominal, 3.3 ohms minimum (measured above 80Hz, Erin’s Audio Corner) | 4 ohms nominal; nearly 3 ohms minimum (measured, Erin’s Audio Corner) |
| Frequency Response | 40Hz - 25kHz (+-3dB, Manufacturer specified) | - |
| Crossover Frequency | 1900Hz | - |
| Power Handling | 100W continuous, 400W peak | - |
| Dimensions | 36.1” x 8.1” x 14.8” (917 x 207 x 375 mm) | 22.9”H x 9.7”W x 10.8”D (581 x 246 x 275 mm) (without grille) |
| Woofer Cabinet | ported, rear | - |
| Spinorama Preference Score | 5.24 | 3.83 |
| Spinorama Preference Score with Perfect Sub | 7.25 | 6.90 |
| DIY Kit | No | No |
| Enclosure | - | Sealed |
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The Two Speakers In Full
Klipsch RP-5000F II: $1,199.98 per pair B&H Photo Video eBay
Pros: The most tonally coherent of the RP II floorstander line, with a mild baffle-step dip and treble tilt but no additional coloration issues beyond that. Precise imaging thanks to the controlled horn/waveguide directivity. Measured bass extension of 55Hz (-3dB), with a measured sensitivity of 90dB.
Cons: Bass extension is underwhelming for a floorstander (F3 at 55Hz, F10 at 41Hz) and needs a subwoofer. Narrow horizontal dispersion (~50-60 degrees) trades soundstage width for imaging precision. A mild high-frequency tilt and a slight lack of detail around 1-1.5kHz.
Full Klipsch RP-5000F II review and specifications →
| Bass Extension (-10dB) | 41Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 55Hz (measured, Erin’s Audio Corner) |
| Crossover Frequency | 1900Hz |
| DIY Kit | No |
| Dimensions | 36.1” x 8.1” x 14.8” (917 x 207 x 375 mm) |
| Drivers | 1” titanium tweeter with Tractrix horn, dual 5.25” cerametallic woofers |
| Frequency Response | 40Hz - 25kHz (+-3dB, Manufacturer specified) |
| Impedance | 8 ohms nominal, 3.3 ohms minimum (measured above 80Hz, Erin’s Audio Corner) |
| Power Handling | 100W continuous, 400W peak |
| Sensitivity | 90dB (2.83V/1m, measured by Erin’s Audio Corner) |
| Spinorama Preference Score | 5.24 |
| Spinorama Preference Score with Perfect Sub | 7.25 |
| Weight | 38.6 lbs (17.5 kg) |
| Woofer Cabinet | ported, rear |
- Links
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Monolith THX-365T: $900 per pair Amazon Monoprice eBay
Pros: The coaxial midrange/tweeter produces coherent horizontal and vertical coverage through most of the vocal band, while twin 6.5-inch woofers deliver good 88.6dB measured sensitivity. Erin found low distortion above the bass and useful dynamic capacity for home theater; the sealed enclosure also makes the intended 80Hz THX crossover predictable. An integrated up-firing Atmos module and THX Ultra certification make this a compact, unusually versatile LCR/tower. Measured bass extension of 84Hz (-3dB), with a measured sensitivity of 88.6dB.
Cons: Erin measured F3 at 84Hz (F10 roughly 40Hz), so it categorically needs a subwoofer. Native response has enough upper-mid/treble irregularity that Erin recommended it only with EQ. Although mostly above four ohms, impedance falls to nearly 3 ohms with an adverse phase angle, potentially stressing an AVR; a separate four-ohm-capable amplifier is prudent. The Atmos module adds cost and height but cannot substitute for properly placed ceiling speakers.
Full Monolith THX-365T review and specifications →
| Bass Extension (-10dB) | ~40Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 84Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No |
| Dimensions | 22.9”H x 9.7”W x 10.8”D (581 x 246 x 275 mm) (without grille) |
| Drivers | Dual 6.5-inch woofers; 2-inch coaxial midrange/1-inch dome; 5.25-inch Atmos coaxial |
| Enclosure | Sealed |
| Impedance | 4 ohms nominal; nearly 3 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | 88.6dB/2.83V/1m (measured, Erin’s Audio Corner) |
| Spinorama Preference Score | 3.83 |
| Spinorama Preference Score with Perfect Sub | 6.90 |
| Weight | 28.4 lbs (12.9 kg) each |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons