Short answer: the Alcons Audio QR24. It ranks #6 of 33 column and line array PA speakers by sound quality, rated 4.0/5, at $7,200; the Alcons Audio QRP40 ranks #8, rated 3.7/5, and costs $7,500, so there is not much of a tradeoff to weigh.
The Alcons Audio QR24 is the more accurate pick. A ribbon column module with accurate, even sound and very high output that works alone or stacked as an array. Its measured preference score, a predictor of how neutral it sounds, is 4.38 against 3.80 for the Alcons Audio QRP40. The tradeoff: Bass drops quickly below about 70Hz, so a subwoofer is needed for full-range music.
What the Alcons Audio QRP40 does well: A shallow wall-mount ribbon column with high output and wide coverage that is easy to hide in a room. The catch: A 4.22 directivity-index deviation means off-axis tone varies more than its Alcons Audio QR24 sibling, and it needs a subwoofer below about 70Hz.
Buy the Alcons Audio QR24. It is rated higher for sound quality than the Alcons Audio QRP40 and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
Still deciding? The full PA & Live Sound rankings cover every ranked option.
Prices on this page were last checked November 7, 2026 at 7:34 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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Specifications Side By Side
| Alcons Audio QR24 | Alcons Audio QRP40 | |
|---|---|---|
| Price | $7,200 Passive | $7,500 Passive |
| Ranked | #6 of 33 in Column and Line Array PA Speakers | #8 of 33 in Column and Line Array PA Speakers |
| Passive | Yes | Yes |
| Configuration | Passive 2-way modular column (pro-ribbon) | Passive 2-way point-source column (pro-ribbon) |
| Drivers | 2x 12” RBN1203 pro-ribbon drivers, 4x 6.5” neodymium woofers (vented) | 1x 12” RBN1203 pro-ribbon driver, 8x 5” woofers (sealed) |
| Frequency Response | 74Hz - 20kHz (±3dB, manufacturer specified) | 71Hz - 20kHz (±3dB, manufacturer specified) |
| Dimensions | 25.9”H x 9.8”W x 13.2”D (658 x 248 x 336 mm) | 44”H x 6.3”W x 9.3”D (1118 x 161 x 236 mm) |
| Amplifier Power | Passive speaker; requires external amplification (Alcons Sentinel) | Passive speaker; requires external amplification (Alcons Sentinel) |
| Maximum SPL | 135dB peak (manufacturer specified) | 131dB peak (manufacturer specified) |
| Coverage | 80° or 110° horizontal x 3.6° per module | 90° x 20° (120° version available) |
| Sensitivity | 109dB (200Hz - 10kHz) | 103dB (200Hz - 10kHz) |
| Impedance | 8 ohms | 4 ohms |
| DSP | No (passive) | No (passive) |
| Weight | 48.5 lbs (22 kg) | 48.5 lbs (22 kg) |
| Bluetooth | No | No |
| XLR Input | No | No |
| RCA Input | No | No |
| TRS Input | No | No |
| Optical Input | No | No |
| Coaxial Input | No | No |
| USB Input | No | No |
| HDMI Input | No | No |
| AES Input | No | No |
| Aux Input | No | No |
| Microphone Input | No | No |
| Guitar Input | No | No |
| Bass Extension (-3dB) | 71Hz (measured, vendor Spinorama data) | 73Hz (measured, vendor Spinorama data) |
| Bass Extension (-10dB) | about 62.5Hz (measured, vendor Spinorama data) | about 63.8Hz (measured, vendor Spinorama data) |
| Spinorama Preference Score | 4.38 | 3.80 |
| Spinorama Preference Score with Perfect Sub | 7.25 | 6.67 |
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