Short answer: the Alcons Audio QRP40. It ranks #8 of 33 column and line array PA speakers by sound quality (rated 3.7/5); the Alcons Audio QRP20 ranks #9 (rated 3.6/5).
The Alcons Audio QRP40 is the deeper-bass option. High-quality manufacturer measurements give preference scores of 3.80 standalone and 6.67 with an ideal subwoofer. Its bass reaches about 73Hz before falling 3dB, against 90Hz for the Alcons Audio QRP20. 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.
Why pick the Alcons Audio QRP20: High-quality manufacturer measurements of the 90° version give preference scores of 3.38 standalone and 6.69 with an ideal subwoofer. Watch for: Bass reaches only 90Hz at -3dB and about 81Hz at -10dB, so it needs a subwoofer for music.
Buy the Alcons Audio QRP40. It is rated higher for sound quality than the Alcons Audio QRP20.
Still deciding? The full PA & Live Sound rankings cover every ranked option.
Specifications Side By Side
| Alcons Audio QRP40 | Alcons Audio QRP20 | |
|---|---|---|
| Price | Passive | Passive |
| Ranked | #8 of 33 in Column and Line Array PA Speakers | #9 of 33 in Column and Line Array PA Speakers |
| Passive | Yes | Yes |
| Configuration | Passive 2-way point-source column (pro-ribbon) | Passive 2-way point-source column (pro-ribbon) |
| Drivers | 1x 12” RBN1203 pro-ribbon driver, 8x 5” woofers (sealed) | 1x 4” RBN401 pro-ribbon driver, 4x 5” woofers (sealed) |
| Frequency Response | 71Hz - 20kHz (±3dB, manufacturer specified) | 72Hz - 20kHz (±3dB, manufacturer specified) |
| Dimensions | 44”H x 6.3”W x 9.3”D (1118 x 161 x 236 mm) | 29.2”H x 5.9”W x 5.9”D (742 x 150 x 150 mm) |
| Amplifier Power | Passive speaker; requires external amplification (Alcons Sentinel) | Passive speaker; requires external amplification (Alcons Sentinel) |
| Maximum SPL | 131dB peak (manufacturer specified) | 128dB peak (manufacturer specified) |
| Coverage | 90° x 20° (120° version available) | 90° x 15° (120° version available) |
| Sensitivity | 103dB (200Hz - 10kHz) | 99dB (200Hz - 10kHz) |
| Impedance | 4 ohms | 4 ohms |
| DSP | No (passive) | No (passive) |
| Weight | 48.5 lbs (22 kg) | 26.5 lbs (12 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) | 73Hz (measured, vendor Spinorama data) | 90Hz (measured, vendor Spinorama data) |
| Bass Extension (-10dB) | about 63.8Hz (measured, vendor Spinorama data) | about 80.8Hz (measured, vendor Spinorama data) |
| Spinorama Preference Score | 3.80 | 3.38 |
| Spinorama Preference Score with Perfect Sub | 6.67 | 6.69 |
| Rigging | - | M10 inserts top and bottom; M6 bracket pattern on back |
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 QRP40 (measured by the manufacturer) and Alcons Audio QRP20 (measured by the manufacturer), via spinorama.org.
Related Speaker Comparisons
More top alternatives to Alcons Audio QRP40:
- Kling Freitag PIA M vs Alcons Audio QRP40
- Alcons Audio QR24 vs Alcons Audio QRP40
- Alcons Audio QRP40 vs L-Acoustics SOKA
- Alcons Audio QRP40 vs JBL COL800
- Alcons Audio QRP40 vs JBL COL600
Prices on this page were last checked October 14, 2026 at 2:38 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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The Two Speakers In Full
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
Alcons Audio QRP20 Passive eBay
Same family: the Alcons Audio QR24 (larger model, ranked higher, rated 4/5) and the Alcons Audio QRP40 (larger model, ranked higher, rated 3.7/5).
Pros: High-quality manufacturer measurements of the 90° version give preference scores of 3.38 standalone and 6.69 with an ideal subwoofer. A 4-inch pro-ribbon driver on a Morpher lens above four sealed 5-inch woofers gives 99dB sensitivity and a 128dB peak from a slim 150mm-square, 12kg column, with 90° or 120° horizontal versions. Measured bass extension of 90Hz (-3dB).
Cons: Bass reaches only 90Hz at -3dB and about 81Hz at -10dB, so it needs a subwoofer for music. The 120° version measures slightly worse, at 3.00 standalone. It needs Alcons Sentinel amplification and is sold only through pro dealers with no published price.
Full Alcons Audio QRP20 review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | Passive speaker; requires external amplification (Alcons Sentinel) |
| Aux Input | No |
| Bass Extension (-10dB) | about 80.8Hz (measured, vendor Spinorama data) |
| Bass Extension (-3dB) | 90Hz (measured, vendor Spinorama data) |
| Bluetooth | No |
| Coaxial Input | No |
| Configuration | Passive 2-way point-source column (pro-ribbon) |
| Coverage | 90° x 15° (120° version available) |
| DSP | No (passive) |
| Dimensions | 29.2”H x 5.9”W x 5.9”D (742 x 150 x 150 mm) |
| Drivers | 1x 4” RBN401 pro-ribbon driver, 4x 5” woofers (sealed) |
| Frequency Response | 72Hz - 20kHz (±3dB, manufacturer specified) |
| Guitar Input | No |
| HDMI Input | No |
| Impedance | 4 ohms |
| Maximum SPL | 128dB peak (manufacturer specified) |
| Microphone Input | No |
| Optical Input | No |
| Passive | Yes |
| RCA Input | No |
| Rigging | M10 inserts top and bottom; M6 bracket pattern on back |
| Sensitivity | 99dB (200Hz - 10kHz) |
| Spinorama Preference Score | 3.38 |
| Spinorama Preference Score with Perfect Sub | 6.69 |
| TRS Input | No |
| USB Input | No |
| Weight | 26.5 lbs (12 kg) |
| XLR Input | No |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons