Short answer: the Alcons Audio QR24. It ranks #6 of 23 column and line array PA speakers by sound quality (rated 4.0/5); the Alcons Audio QRP40 ranks #7 (rated 3.7/5).
The Alcons Audio QR24 is the more accurate pick. High-quality manufacturer measurements give preference scores of 4.38 standalone and 7.25 with an ideal subwoofer, with a tight 1.4dB reference band and 0.279 listening-window deviation. 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: High-quality manufacturer measurements give preference scores of 3.80 standalone and 6.67 with an ideal subwoofer. 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.
Still deciding? The full PA & Live Sound rankings cover every ranked option.
Specifications Side By Side
| Alcons Audio QR24 | Alcons Audio QRP40 | |
|---|---|---|
| Price | Passive | Passive |
| Ranked | #6 of 23 in Column and Line Array PA Speakers | #7 of 23 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 |
Frequency Response Compared
Both speakers’ spinorama measurements, overlaid. A flatter line is more neutral: peaks sound forward or harsh, dips sound recessed. Each curve is shifted so its average from 300 Hz to 3 kHz sits at 0 dB, so loudness differences between the two are removed and only the shape is compared.
Measurement data: Alcons Audio QR24 (measured by the manufacturer) and Alcons Audio QRP40 (measured by the manufacturer), via spinorama.org.
Related Speaker Comparisons
How Alcons Audio QR24 compares with other leading options:
- L-Acoustics SYVA-low+top vs Alcons Audio QR24
- JBL CBT 1000 + CBT 1000E vs Alcons Audio QR24
- JBL CBT 1000 vs Alcons Audio QR24
- Kling Freitag PIA M vs Alcons Audio QR24
- L-Acoustics SYVA vs Alcons Audio QR24
Prices on this page were last checked October 12, 2026 at 4:13 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.
As an eBay Partner, we may be compensated if you make a purchase.
The Two Speakers In Full
Alcons Audio QR24 Passive eBay
Same family: the Alcons Audio QRP20 (smaller model, ranked lower, rated 3.6/5) and the Alcons Audio QRP40 (larger model, ranked lower, rated 3.7/5).
Pros: High-quality manufacturer measurements give preference scores of 4.38 standalone and 7.25 with an ideal subwoofer, with a tight 1.4dB reference band and 0.279 listening-window deviation. Two 12-inch pro-ribbon drivers above four 6.5-inch woofers give 109dB sensitivity and a 135dB peak, and bass reaches 71Hz at -3dB. It works alone or stacked with more modules as a vertical array, in 80° or 110° horizontal versions. Measured bass extension of 71Hz (-3dB).
Cons: Bass drops quickly below about 70Hz, so a subwoofer is needed for full-range music. It needs Alcons Sentinel amplification for its presets, weighs 22kg, and is sold only through pro dealers with no published price.
Full Alcons Audio QR24 review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | Passive speaker; requires external amplification (Alcons Sentinel) |
| Aux Input | No |
| Bass Extension (-10dB) | about 62.5Hz (measured, vendor Spinorama data) |
| Bass Extension (-3dB) | 71Hz (measured, vendor Spinorama data) |
| Bluetooth | No |
| Coaxial Input | No |
| Configuration | Passive 2-way modular column (pro-ribbon) |
| Coverage | 80° or 110° horizontal x 3.6° per module |
| DSP | No (passive) |
| Dimensions | 25.9”H x 9.8”W x 13.2”D (658 x 248 x 336 mm) |
| Drivers | 2x 12” RBN1203 pro-ribbon drivers, 4x 6.5” neodymium woofers (vented) |
| Frequency Response | 74Hz - 20kHz (±3dB, manufacturer specified) |
| Guitar Input | No |
| HDMI Input | No |
| Impedance | 8 ohms |
| Maximum SPL | 135dB peak (manufacturer specified) |
| Microphone Input | No |
| Optical Input | No |
| Passive | Yes |
| RCA Input | No |
| Sensitivity | 109dB (200Hz - 10kHz) |
| Spinorama Preference Score | 4.38 |
| Spinorama Preference Score with Perfect Sub | 7.25 |
| TRS Input | No |
| USB Input | No |
| Weight | 48.5 lbs (22 kg) |
| XLR Input | No |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Alcons Audio QRP40 Passive eBay
Same family: the Alcons Audio QRP20 (smaller model, ranked lower, rated 3.6/5) and the Alcons Audio QR24 (smaller model, ranked higher, rated 4/5).
Pros: High-quality manufacturer measurements give preference scores of 3.80 standalone and 6.67 with an ideal subwoofer. A 12-inch pro-ribbon driver sits coaxially within eight sealed 5-inch woofers, giving 103dB sensitivity and a 131dB peak with 90° or 120° horizontal coverage. Bass reaches 73Hz at -3dB, and the shallow 236mm cabinet is easy to hide on a wall. Measured bass extension of 73Hz (-3dB).
Cons: 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. It needs Alcons Sentinel amplification and is sold only through pro dealers with no published price.
Full Alcons Audio QRP40 review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | Passive speaker; requires external amplification (Alcons Sentinel) |
| Aux Input | No |
| Bass Extension (-10dB) | about 63.8Hz (measured, vendor Spinorama data) |
| Bass Extension (-3dB) | 73Hz (measured, vendor Spinorama data) |
| Bluetooth | No |
| Coaxial Input | No |
| Configuration | Passive 2-way point-source column (pro-ribbon) |
| Coverage | 90° x 20° (120° version available) |
| DSP | No (passive) |
| Dimensions | 44”H x 6.3”W x 9.3”D (1118 x 161 x 236 mm) |
| Drivers | 1x 12” RBN1203 pro-ribbon driver, 8x 5” woofers (sealed) |
| Frequency Response | 71Hz - 20kHz (±3dB, manufacturer specified) |
| Guitar Input | No |
| HDMI Input | No |
| Impedance | 4 ohms |
| Maximum SPL | 131dB peak (manufacturer specified) |
| Microphone Input | No |
| Optical Input | No |
| Passive | Yes |
| RCA Input | No |
| Sensitivity | 103dB (200Hz - 10kHz) |
| Spinorama Preference Score | 3.80 |
| Spinorama Preference Score with Perfect Sub | 6.67 |
| TRS Input | No |
| USB Input | No |
| Weight | 48.5 lbs (22 kg) |
| XLR Input | No |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons