Short answer: the Q Acoustics 5040 for better sound quality, the JBL Stage 2 280F for the lower price. The Q Acoustics 5040 ranks #33 of 71 floorstanding speakers at $1236.49. The JBL Stage 2 280F ranks #62 at $659.95, $576.54 cheaper.
What the Q Acoustics 5040 offers: C3 (Continuous Curved Cone) driver profile technology provides smooth midrange integration, controlled cone breakup, and improved bass damping. High voltage sensitivity (91.5dB SPL at 2.83V/1m) allows loud listening with low-to-moderate amplifier wattage. Cabinet features Point-to-Point (P2P) internal bracing and Helmholtz Pressure Equalizer (HPE) tubes to suppress internal standing waves and panel vibrations. Watch for: Free-field frequency response exhibits a noticeable mid-bass scoop around 200Hz (~6dB lower than mean SPL), causing an F3 of 70Hz (F10 of 39Hz) in open space and requiring boundary placement (11-22 inches from front wall) to reinforce upper bass output. Measurements indicate an enclosure resonance near 300Hz visible in sound power data. Minimum impedance drops to 3.0 ohms, demanding a stable 4-ohm rated amplifier despite high sensitivity.
What the JBL Stage 2 280F offers: Genuinely impressive output capability and low compression/distortion for the price, courtesy of the dual 8” woofers - the reviewer’s standout praise for this pair. High sensitivity (89.5dB measured) and low impedance make it easy to drive. Decent bass extension (F3 48Hz, F10 30Hz) reaches about 50Hz in-room. Horizontal dispersion is reasonably consistent (~55 degrees), meaning the speaker takes reasonably well to EQ correction. Watch for: Explicitly called out as disappointing relative to expectations for the JBL name and this price point - lacks native linearity compared to similarly-priced alternatives like the Polk Reserve R500, which the reviewer recommends instead for anyone who doesn’t want to rely on EQ. Treble falls off a cliff above about 10-12kHz, giving a notable lack of air/space that needs real correction (a wide +Q0.5 boost from 10-20kHz) to fix. A sharp impedance resonance around 900Hz-1.1kHz is nearly impossible to EQ out cleanly even with narrow filters. Elevated multitone distortion in the 600Hz-2.5kHz range, tied to the midwoofer rather than the tweeter. Compared to the similarly-priced Klipsch RP-6000F II/RP-8000F II, this JBL is less directive and native-flat but does extend roughly 20Hz deeper in the bass - a real tradeoff either way, not a clean win.
Buy the Q Acoustics 5040 if sound quality matters more than the price. Buy the JBL Stage 2 280F if the price matters more than sound quality.
If sound quality matters at all to you, skip the JBL Stage 2 280F. It ranks near the bottom of the 71 floorstanding speakers, so look higher up the list instead.
Specifications Side By Side
| Q Acoustics 5040 | JBL Stage 2 280F | |
|---|---|---|
| Price | $1,236.49 | $659.95 |
| Ranked | #33 of 71 in Large Size Floorstanding Speakers | #62 of 71 in Large Size Floorstanding Speakers |
| Bass Extension (-10dB) | 39Hz (measured, Erin’s Audio Corner) | 30Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 70Hz (measured, Erin’s Audio Corner) | 48Hz (measured, Erin’s Audio Corner) |
| Dimensions | 38.1"H x 11.5"W x 14.2"D (967 x 293 x 361 mm) | 43.8" x 14.1" x 16.5" (1113 x 358 x 419 mm) |
| Impedance | 6 ohms nominal (3.0 ohms minimum, measured by Erin’s Audio Corner) | 6 ohms nominal, 3.9 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | 91.5dB (measured average, Erin’s Audio Corner) | 89.5dB (2.83V/1m, measured by Erin’s Audio Corner) |
| Drivers | 0.88 in. decoupled dome tweeter, twin 5.0 in. C3 Continuous Curved Cone woofers | 1" anodized aluminum dome tweeter with HDI waveguide, dual 8" polycellulose woofers |
| Weight | 39.7 lbs / 18.0 kg each | 55.1 lbs / 25 kg (55.2 lb) each |
| Woofer Cabinet | ported, rear | ported, rear |
| Crossover Frequency | - | 1.1kHz, 2.1kHz |
| Output Power | - | 125W RMS |
Related Speaker Comparisons
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- Polk Audio Reserve R700 vs Polk Reserve R500
- Magnepan LRS+ vs JBL Studio 698
- Polk Audio Reserve R700 vs Infinity Primus 360
- Q Acoustics 5040 vs Infinity Primus 360
- Q Acoustics 5040 vs ELAC Debut 3.0 DF63
Prices on this page were last checked August 25, 2026 at 6:19 AM 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
Q Acoustics 5040: $1,236.49 Amazon eBay
Pros: C3 (Continuous Curved Cone) driver profile technology provides smooth midrange integration, controlled cone breakup, and improved bass damping. High voltage sensitivity (91.5dB SPL at 2.83V/1m) allows loud listening with low-to-moderate amplifier wattage. Cabinet features Point-to-Point (P2P) internal bracing and Helmholtz Pressure Equalizer (HPE) tubes to suppress internal standing waves and panel vibrations.
Cons: Free-field frequency response exhibits a noticeable mid-bass scoop around 200Hz (~6dB lower than mean SPL), causing an F3 of 70Hz (F10 of 39Hz) in open space and requiring boundary placement (11-22 inches from front wall) to reinforce upper bass output. Measurements indicate an enclosure resonance near 300Hz visible in sound power data. Minimum impedance drops to 3.0 ohms, demanding a stable 4-ohm rated amplifier despite high sensitivity.
Full Q Acoustics 5040 review and specifications →
| Bass Extension (-10dB) | 39Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 70Hz (measured, Erin's Audio Corner) |
| Dimensions | 38.1"H x 11.5"W x 14.2"D (967 x 293 x 361 mm) |
| Drivers | 0.88 in. decoupled dome tweeter, twin 5.0 in. C3 Continuous Curved Cone woofers |
| Impedance | 6 ohms nominal (3.0 ohms minimum, measured by Erin's Audio Corner) |
| Sensitivity | 91.5dB (measured average, Erin's Audio Corner) |
| Weight | 39.7 lbs / 18.0 kg each |
| Woofer Cabinet | ported, rear |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Q Acoustics 5040 vs Polk Audio Reserve R700
- Q Acoustics 5040 vs PSB Imagine T65
- Q Acoustics 5040 vs ELAC Debut 3.0 DF63
- Q Acoustics 5040 vs Emotiva Airmotiv T2+
- Q Acoustics 5040 vs Polk Reserve R500
- Q Acoustics 5040 vs JBL HDI-3600
- Q Acoustics 5040 vs Definitive Technology BP-9020
- Q Acoustics 5040 vs KEF R11 Meta
- See all 36 comparisons
JBL Stage 2 280F: $659.95 Amazon eBay
Pros: Genuinely impressive output capability and low compression/distortion for the price, courtesy of the dual 8” woofers - the reviewer’s standout praise for this pair. High sensitivity (89.5dB measured) and low impedance make it easy to drive. Decent bass extension (F3 48Hz, F10 30Hz) reaches about 50Hz in-room. Horizontal dispersion is reasonably consistent (~55 degrees), meaning the speaker takes reasonably well to EQ correction.
Cons: Explicitly called out as disappointing relative to expectations for the JBL name and this price point - lacks native linearity compared to similarly-priced alternatives like the Polk Reserve R500, which the reviewer recommends instead for anyone who doesn’t want to rely on EQ. Treble falls off a cliff above about 10-12kHz, giving a notable lack of air/space that needs real correction (a wide +Q0.5 boost from 10-20kHz) to fix. A sharp impedance resonance around 900Hz-1.1kHz is nearly impossible to EQ out cleanly even with narrow filters. Elevated multitone distortion in the 600Hz-2.5kHz range, tied to the midwoofer rather than the tweeter. Compared to the similarly-priced Klipsch RP-6000F II/RP-8000F II, this JBL is less directive and native-flat but does extend roughly 20Hz deeper in the bass - a real tradeoff either way, not a clean win.
Full JBL Stage 2 280F review and specifications →
| Bass Extension (-10dB) | 30Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 48Hz (measured, Erin's Audio Corner) |
| Crossover Frequency | 1.1kHz, 2.1kHz |
| Dimensions | 43.8" x 14.1" x 16.5" (1113 x 358 x 419 mm) |
| Drivers | 1" anodized aluminum dome tweeter with HDI waveguide, dual 8" polycellulose woofers |
| Impedance | 6 ohms nominal, 3.9 ohms minimum (measured, Erin's Audio Corner) |
| Output Power | 125W RMS |
| Sensitivity | 89.5dB (2.83V/1m, measured by Erin's Audio Corner) |
| Weight | 55.1 lbs / 25 kg (55.2 lb) each |
| Woofer Cabinet | ported, rear |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- JBL Stage 2 280F vs Magnepan LRS+
- JBL Stage 2 280F vs Infinity Reference 253
- JBL Stage 2 280F vs Sony SS-CS3
- JBL Stage 2 280F vs Focal Aria Evo X N°2
- JBL Stage 2 280F vs JBL Studio 590
- JBL Stage 2 280F vs Polk T50
- JBL Stage 2 280F vs Triangle Esprit Antal Ez
- JBL Stage 2 280F vs Klipsch RP-6000F II
- See all 27 comparisons