Short answer: the Alcons Audio QRP40. It ranks #7 of 13 line array and installation pa speakers by sound quality (rated 3.7/5); the Alcons Audio QRP20 ranks #8 (rated 3.6/5).
Why pick the Alcons Audio QRP40: High-quality manufacturer measurements give preference scores of 3.80 standalone and 6.67 with an ideal subwoofer. The tradeoff: A 4.22 directivity-index deviation means off-axis tone varies more than its 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 | - | - |
| Ranked | #7 of 13 in Line Array and Installation PA Speakers | #8 of 13 in Line Array and Installation PA Speakers |
| 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 |
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 September 26, 2026 at 11:14 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
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 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 |
| 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
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 |
| RCA Input | No |
| 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