Short answer: the Alcons Audio QRP20. It ranks #8 of 13 line array and installation pa speakers by sound quality (rated 3.6/5); the L-Acoustics SOKA ranks #9 (rated 3.5/5).
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.
The case for the L-Acoustics SOKA: An ultra-shallow line source only about 10cm deep and 9.4kg that reaches 133dB with 140° horizontal coverage, which lets it hide against a wall or column. The tradeoff: Bass reaches only about 128Hz (-3dB), so it needs a subwoofer or a bass companion, and it is passive, so it requires L-Acoustics amplified controllers.
Buy the Alcons Audio QRP20. It is rated higher for sound quality than the L-Acoustics SOKA.
Looking for alternatives? See the complete PA & Live Sound rankings.
Specifications Side By Side
| Alcons Audio QRP20 | L-Acoustics SOKA | |
|---|---|---|
| Price | - | - |
| Ranked | #8 of 13 in Line Array and Installation PA Speakers | #9 of 13 in Line Array and Installation PA Speakers |
| Configuration | Passive 2-way point-source column (pro-ribbon) | Passive 2-way ultra-shallow line source |
| Drivers | 1x 4” RBN401 pro-ribbon driver, 4x 5” woofers (sealed) | 9x 3.5” neodymium cone drivers, 3x 1” neodymium compression drivers |
| Frequency Response | 72Hz - 20kHz (±3dB, manufacturer specified) | 70Hz - 20kHz (-10dB, manufacturer specified) |
| Dimensions | 29.2”H x 5.9”W x 5.9”D (742 x 150 x 150 mm) | 41.9”H x 3.9”W x 4.1”D (1065 x 99 x 104 mm) |
| Amplifier Power | Passive speaker; requires external amplification (Alcons Sentinel) | Passive speaker; requires external amplification (L-Acoustics amplified controller) |
| Maximum SPL | 128dB peak (manufacturer specified) | 133dB peak (manufacturer specified) |
| Coverage | 90° x 15° (120° version available) | 140° horizontal, +5°/-21° vertical |
| Sensitivity | 99dB (200Hz - 10kHz) | - |
| Impedance | 4 ohms | - |
| DSP | No (passive) | No (passive; processing comes from the amplified controller) |
| Weight | 26.5 lbs (12 kg) | 20.7 lbs (9.4 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) | 90Hz (measured, vendor Spinorama data) | 128Hz (measured, vendor Spinorama data) |
| Bass Extension (-10dB) | about 80.8Hz (measured, vendor Spinorama data) | - |
| Spinorama Preference Score | 3.38 | 3.21 |
| Spinorama Preference Score with Perfect Sub | 6.69 | 6.99 |
Related Speaker Comparisons
More worthwhile head-to-heads for Alcons Audio QRP20:
- L-Acoustics SYVA vs Alcons Audio QRP20
- Alcons Audio QRP40 vs Alcons Audio QRP20
- Alcons Audio QRP20 vs JBL CBT 70J-1
- Alcons Audio QRP20 vs JBL COL800
- Alcons Audio QRP20 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 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
L-Acoustics SOKA Passive eBay
Pros: An ultra-shallow line source only about 10cm deep and 9.4kg that reaches 133dB with 140° horizontal coverage, which lets it hide against a wall or column. Vendor Spinorama data gives preference scores of 3.21 standalone and 6.99 with an ideal subwoofer. Measured bass extension of 128Hz (-3dB).
Cons: Bass reaches only about 128Hz (-3dB), so it needs a subwoofer or a bass companion, and it is passive, so it requires L-Acoustics amplified controllers. Listening-window narrow-band deviation is 0.348 and pricing is dealer quoted.
Full L-Acoustics SOKA review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | Passive speaker; requires external amplification (L-Acoustics amplified controller) |
| Aux Input | No |
| Bass Extension (-3dB) | 128Hz (measured, vendor Spinorama data) |
| Bluetooth | No |
| Coaxial Input | No |
| Configuration | Passive 2-way ultra-shallow line source |
| Coverage | 140° horizontal, +5°/-21° vertical |
| DSP | No (passive; processing comes from the amplified controller) |
| Dimensions | 41.9”H x 3.9”W x 4.1”D (1065 x 99 x 104 mm) |
| Drivers | 9x 3.5” neodymium cone drivers, 3x 1” neodymium compression drivers |
| Frequency Response | 70Hz - 20kHz (-10dB, manufacturer specified) |
| Guitar Input | No |
| HDMI Input | No |
| Maximum SPL | 133dB peak (manufacturer specified) |
| Microphone Input | No |
| Optical Input | No |
| RCA Input | No |
| Spinorama Preference Score | 3.21 |
| Spinorama Preference Score with Perfect Sub | 6.99 |
| TRS Input | No |
| USB Input | No |
| Weight | 20.7 lbs (9.4 kg) |
| XLR Input | No |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons