Short answer: the Kling Freitag PIA M. It ranks #4 of 13 line array and installation pa speakers by sound quality (rated 4.1/5); the Alcons Audio QR24 ranks #6 (rated 4.0/5).
Why pick the Kling Freitag PIA M: High-quality manufacturer measurements give preference scores of 4.50 standalone and 7.92 with an ideal subwoofer, with a 1.7dB reference band and 0.82 predicted in-room smoothness. The catch: Bass is limited, at 95Hz for -3dB and about 82Hz for -10dB in bass-reflex mode, so it needs a subwoofer for music.
What the Alcons Audio QR24 does well: 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. The catch: Bass drops quickly below about 70Hz, so a subwoofer is needed for full-range music.
Buy the Kling Freitag PIA M. It is rated higher for sound quality than the Alcons Audio QR24.
Want more options? Browse the full PA & Live Sound rankings.
Specifications Side By Side
| Kling Freitag PIA M | Alcons Audio QR24 | |
|---|---|---|
| Price | - | - |
| Ranked | #4 of 13 in Line Array and Installation PA Speakers | #6 of 13 in Line Array and Installation PA Speakers |
| Configuration | Passive 3-way column loudspeaker | Passive 2-way modular column (pro-ribbon) |
| Drivers | 4x 0.75” compression drivers on adjustable horn, 2x 4” midrange (cardioid chamber), 4x 4” woofers (switchable bass-reflex/cardioid) | 2x 12” RBN1203 pro-ribbon drivers, 4x 6.5” neodymium woofers (vented) |
| Frequency Response | 85Hz - 23kHz (±10dB, bass-reflex mode, manufacturer specified) | 74Hz - 20kHz (±3dB, manufacturer specified) |
| Dimensions | 47.1”H x 5.5”W x 6.6”D (1196 x 139 x 168 mm) | 25.9”H x 9.8”W x 13.2”D (658 x 248 x 336 mm) |
| Amplifier Power | Passive speaker; requires external amplification | Passive speaker; requires external amplification (Alcons Sentinel) |
| Power Handling | 150W nominal / 325W program / 650W peak | - |
| Maximum SPL | 132dB (manufacturer specified) | 135dB peak (manufacturer specified) |
| Coverage | 100° x 5° to 25° (adjustable) | 80° or 110° horizontal x 3.6° per module |
| Impedance | 8 ohms | 8 ohms |
| DSP | No (passive) | No (passive) |
| Weight | 26.9 lbs (12.2 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) | 95Hz (measured, vendor Spinorama data) | 71Hz (measured, vendor Spinorama data) |
| Bass Extension (-10dB) | about 81.7Hz (measured, vendor Spinorama data) | about 62.5Hz (measured, vendor Spinorama data) |
| Spinorama Preference Score | 4.50 | 4.38 |
| Spinorama Preference Score with Perfect Sub | 7.92 | 7.25 |
| Sensitivity | - | 109dB (200Hz - 10kHz) |
Related Speaker Comparisons
How Kling Freitag PIA M compares with other leading options:
- L-Acoustics SYVA-low+top vs Kling Freitag PIA M
- JBL CBT 1000 + CBT 1000E vs Kling Freitag PIA M
- JBL CBT 1000 vs Kling Freitag PIA M
- Kling Freitag PIA M vs L-Acoustics SYVA
- Kling Freitag PIA M vs Alcons Audio QRP40
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
Kling Freitag PIA M Passive eBay
Pros: High-quality manufacturer measurements give preference scores of 4.50 standalone and 7.92 with an ideal subwoofer, with a 1.7dB reference band and 0.82 predicted in-room smoothness. The 3-way column has an adjustable tweeter array (5°, 15° or 25° vertical), a cardioid midrange and a woofer section switchable between bass reflex and cardioid to cut sound behind the speaker. It reaches 132dB from a slim 12.2kg cabinet. Measured bass extension of 95Hz (-3dB).
Cons: Bass is limited, at 95Hz for -3dB and about 82Hz for -10dB in bass-reflex mode, so it needs a subwoofer for music. It is passive and meant for Kling & Freitag amplifiers, and it is sold only through pro dealers with no published price.
Full Kling Freitag PIA M review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | Passive speaker; requires external amplification |
| Aux Input | No |
| Bass Extension (-10dB) | about 81.7Hz (measured, vendor Spinorama data) |
| Bass Extension (-3dB) | 95Hz (measured, vendor Spinorama data) |
| Bluetooth | No |
| Coaxial Input | No |
| Configuration | Passive 3-way column loudspeaker |
| Coverage | 100° x 5° to 25° (adjustable) |
| DSP | No (passive) |
| Dimensions | 47.1”H x 5.5”W x 6.6”D (1196 x 139 x 168 mm) |
| Drivers | 4x 0.75” compression drivers on adjustable horn, 2x 4” midrange (cardioid chamber), 4x 4” woofers (switchable bass-reflex/cardioid) |
| Frequency Response | 85Hz - 23kHz (±10dB, bass-reflex mode, manufacturer specified) |
| Guitar Input | No |
| HDMI Input | No |
| Impedance | 8 ohms |
| Maximum SPL | 132dB (manufacturer specified) |
| Microphone Input | No |
| Optical Input | No |
| Power Handling | 150W nominal / 325W program / 650W peak |
| RCA Input | No |
| Spinorama Preference Score | 4.50 |
| Spinorama Preference Score with Perfect Sub | 7.92 |
| TRS Input | No |
| USB Input | No |
| Weight | 26.9 lbs (12.2 kg) |
| XLR Input | No |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Alcons Audio QR24 Passive eBay
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 |
| 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