Short answer: the Revel Concerta2 F35. It ranks #30 of 188 floorstanding speakers by sound quality (rated 4.5/5) at $900 and is still sold new; the Monolith THX-365T ranks #112 (rated 3.9/5) and is discontinued, so it is only an option used.
The Revel Concerta2 F35 is the more accurate, deeper-bass choice. Two-and-a-half-way, four-driver design: a 1” aluminum dome tweeter on a waveguide, a 5.25” mid-range, and dual 5.25” mid-bass drivers in a rear-ported cabinet. Its measured preference score, a predictor of how neutral it sounds, is 5.35 against 3.83 for the Monolith THX-365T. Its bass reaches about 70Hz before falling 3dB, against 84Hz for the Monolith THX-365T. The catch: F3 of 61Hz and F10 of 39Hz mean a subwoofer is needed for real bass extension.
What the Monolith THX-365T does well: 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 tradeoff: Erin measured F3 at 84Hz (F10 roughly 40Hz), so it categorically needs a subwoofer.
Buy the Revel Concerta2 F35. It is rated higher for sound quality, and the Monolith THX-365T is discontinued, so it is only available used.
Want more options? Browse the full Passive Home rankings.
Specifications Side By Side
| Revel Concerta2 F35 | Monolith THX-365T | |
|---|---|---|
| Price | $900 per pair | Discontinued |
| Ranked | #30 of 188 in Large Size Floorstanding Speakers | #112 of 188 in Large Size Floorstanding Speakers |
| Bass Extension (-10dB) | 50Hz (measured, Erin’s Audio Corner) | ~40Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 70Hz (measured, Erin’s Audio Corner) | 84Hz (measured, Erin’s Audio Corner) |
| Dimensions | 40.3”H x 8.4”W x 12.2”D (1023.6 x 213.4 x 309.9 mm) | 22.9”H x 9.7”W x 10.8”D (581 x 246 x 275 mm) (without grille) |
| Impedance | 6 ohms nominal (3.8 ohms minimum, measured by Erin’s Audio Corner) | 4 ohms nominal; nearly 3 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | 89.4dB (measured, Erin’s Audio Corner; 90dB manufacturer specified) | 88.6dB/2.83V/1m (measured, Erin’s Audio Corner) |
| Drivers | 3x 5.25” deep anodized aluminum cone woofers, 1” Aluminum Tweeter | Dual 6.5-inch woofers; 2-inch coaxial midrange/1-inch dome; 5.25-inch Atmos coaxial |
| Weight | 41 lbs (18.6 kg) each | 28.4 lbs (12.9 kg) each |
| Woofer Cabinet | ported, rear | - |
| Spinorama Preference Score | 5.35 | 3.83 |
| Spinorama Preference Score with Perfect Sub | 7.30 | 6.90 |
| DIY Kit | No | No |
| Enclosure | - | Sealed |
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The Two Speakers In Full
Revel Concerta2 F35: $900 per pair Crutchfield eBay
Same family: the Revel Concerta2 M16 (bookshelf, rated 4.1/5), the Revel Concerta2 F36 (larger floorstanding, ranked higher, estimated 4.6/5) and the Revel Concerta2 C25 (center, rated 4.1/5).
Pros: Two-and-a-half-way, four-driver design: a 1” aluminum dome tweeter on a waveguide, a 5.25” mid-range, and dual 5.25” mid-bass drivers in a rear-ported cabinet. Measured sensitivity of 89.4dB closely matches the 90dB spec, and distortion looks good at both 86dB and 96dB, holding up well even with a high-pass filter applied. At its sale price of $900/pair, down from full retail, the reviewer calls it a “no-brainer,” undercutting comparable budget floorstanders like the ELAC Debut 3.0 DF63. Frequency response and directivity mismatches are largely EQ-able, since most of what shows up in measurements traces to physical tweeter/mid-range separation rather than a fundamental flaw. Compression is fairly well controlled for the price: about 1dB of loss around 100Hz under long-term compression, described as “par for the course” at this cost. Measured bass extension of 70Hz (-3dB), with a measured sensitivity of 89.4dB.
Cons: F3 of 61Hz and F10 of 39Hz mean a subwoofer is needed for real bass extension. A dip in the lower midrange/2-3kHz region reduces attack and detail, and a peak around 5kHz adds some edge and sibilance in the lower treble. A peak in off-axis energy around 3kHz reflects off sidewalls at roughly 60-70° off-axis and arrives louder than the direct sound: this specific issue can’t be fixed with EQ (boosting the direct sound would boost the stronger reflection too) and would need acoustic absorption to properly address, though the reviewer considers it a minor, optional fix at this price. A couple of minor resonances appear in the impedance plot, including one around 300Hz that may partly explain a subtle sense of vocal warmth noticed in listening, though it’s more likely room-related. Minimum impedance around 3.8 ohms. Short-term compression testing shows some increased distortion in the tweeter and higher-frequency compression at loud output.
Full Revel Concerta2 F35 review and specifications →
| Bass Extension (-10dB) | 50Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 70Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No |
| Dimensions | 40.3”H x 8.4”W x 12.2”D (1023.6 x 213.4 x 309.9 mm) |
| Drivers | 3x 5.25” deep anodized aluminum cone woofers, 1” Aluminum Tweeter |
| Impedance | 6 ohms nominal (3.8 ohms minimum, measured by Erin’s Audio Corner) |
| Sensitivity | 89.4dB (measured, Erin’s Audio Corner; 90dB manufacturer specified) |
| Spinorama Preference Score | 5.35 |
| Spinorama Preference Score with Perfect Sub | 7.30 |
| Weight | 41 lbs (18.6 kg) each |
| Woofer Cabinet | ported, rear |
- Links
- Reviews, Comparisons and Sound Samples
- Audio Science Review Revel Concerta2 F35 More from Audio Science Review →
- Erin’s Audio Corner: Revel F35 Review: Great Sound, Lower Price! More from Erin’s Audio Corner →
- Erin’s Audio Review Website Revel Concerta2 F35
- Audio Science Review Measurements (spinorama.org)
- Erin’s Audio Corner: You’ve Never Seen a Review Like This. Revel F35 Review (Part 1).
- Head-to-Head Comparisons
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- Revel Concerta2 F35 vs JBL HDI-3800
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Monolith THX-365T Discontinued eBay
Same family: the Monolith THX-365C (center, rated 4.1/5) and the Monolith THX-365IW (in-wall, rated 4/5).
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. Discontinued.
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