Short answer: the GR-Research NX-Treme for the higher ranking, the Revel Concerta2 F35 for the lower price. The GR-Research NX-Treme ranks #1 of 25 floorstanding speakers at $9662. The Revel Concerta2 F35 ranks #14 at $900, $8762 cheaper.
On the GR-Research NX-Treme side: Amazing in terms of soundstage and imaging as the speaker can radiate in all directions and not have internal reflections due to there not. The catch: Very tall and will require GR-Research open baffle subwoofers one on each side.
The case for the Revel Concerta2 F35: Two-and-a-half-way, four-driver design: a 1” aluminum dome tweeter on a waveguide, a 5.25” mid-range. Set against that: F3 of 61Hz and F10 of 39Hz mean a subwoofer is needed for real bass extension.
Buy the GR-Research NX-Treme if the ranking matters more than the price. Buy the Revel Concerta2 F35 if the price matters more than the ranking.
Specifications Side By Side
| GR-Research NX-Treme | Revel Concerta2 F35 | |
|---|---|---|
| Price | $9662 for the kit with subs (assembly required) | $900 |
| Ranked | #1 of 25 in Large Size Floorstanding Speakers | #14 of 25 in Large Size Floorstanding Speakers |
| Bass Extension (-3dB) | <20hz (With GR-Research open baffle subwoofers) | 70Hz |
| Dimensions | 85"H x 17"W x 20"D (2159 x 431.8 x 508 mm) (plus a subwoofer on each side) | 40.3"H x 8.4"W x 12.2"D (1023.6 x 213.4 x 309.9 mm) |
| Impedance | 8 ohms | 6 ohms |
| Drivers | Eight 6.5" M165 open baffle woofer, Two 6.5" M165NQ open baffle midrange, GR Neo 3 Magnetic planar open baffle tweeter | 3x 5.25" deep anodized aluminum cone woofers, 1" Aluminum Tweeter |
| Sensitivity | 94.5dB | 90dB |
| Subwoofer | Three 12" Rythmik Audio servo controlled | - |
| Woofer Cabinet | Open baffle | Rear ported |
| Weight | (35.3 lbs / 16 kg) | 41 lbs / 18.6 kg each |
| Bass Extension (-10dB) | - | 50Hz |
The Two Speakers In Full
GR-Research NX-Treme: $9662 for the kit with subs (assembly required) Gr-research
Pros: Amazing in terms of soundstage and imaging as the speaker can radiate in all directions and not have internal reflections due to there not being a speaker box. One of the highest sensitivity speakers around. Open baffle mids, highs and bass (using GR-Research Open baffle subs). If you have not heard open baffle bass, you must hear it in person, there’s no going back. Amazing in terms of imaging as the speaker can radiate in all directions and not have internal reflections due to there not being a speaker box. Can easily be driven by tube amps due to the mild impedance.
Cons: Very tall and will require GR-Research open baffle subwoofers one on each side
| Bass Extension (-3dB) | <20hz (With GR-Research open baffle subwoofers) |
|---|---|
| Dimensions | 85"H x 17"W x 20"D (2159 x 431.8 x 508 mm) (plus a subwoofer on each side) |
| Drivers | Eight 6.5" M165 open baffle woofer, Two 6.5" M165NQ open baffle midrange, GR Neo 3 Magnetic planar open baffle tweeter |
| Impedance | 8 ohms |
| Sensitivity | 94.5dB |
| Subwoofer | Three 12" Rythmik Audio servo controlled |
| Weight | (35.3 lbs / 16 kg) |
| Woofer Cabinet | Open baffle |
- Head-to-Head Comparisons
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Revel Concerta2 F35: $900 Crutchfield
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 (around $900/pair, down from full retail), the reviewer calls it a “no-brainer,” undercutting comparable budget floorstanders like the ELAC 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.
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.
| Bass Extension (-10dB) | 50Hz |
|---|---|
| Bass Extension (-3dB) | 70Hz |
| 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 |
| Sensitivity | 90dB |
| Weight | 41 lbs / 18.6 kg each |
| Woofer Cabinet | Rear ported |
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Product prices and availability were last checked August 9, 2026 at 6:57 AM UTC 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.