Short answer: the Kling Freitag PIA M. It ranks #4 of 33 column and line array PA speakers by sound quality, rated 4.1/5, at $6,780; the Alcons Audio QR24 ranks #6, rated 4.0/5, and costs $7,200, so there is little reason to consider the other one.
Why pick the Kling Freitag PIA M: A slim, very loud passive column with accurate sound, adjustable vertical coverage, and a cardioid mode that cuts sound behind it. 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.
The Alcons Audio QR24 is the deeper-bass pick. A ribbon column module with accurate, even sound and very high output that works alone or stacked as an array. Its bass reaches about 71Hz before falling 3dB, against 95Hz for the Kling Freitag PIA M. The tradeoff: 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 and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
Want more options? Browse the full PA & Live Sound rankings.
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Specifications Side By Side
| Kling Freitag PIA M | Alcons Audio QR24 | |
|---|---|---|
| Price | $6,780 Passive | $7,200 Passive |
| Ranked | #4 of 33 in Column and Line Array PA Speakers | #6 of 33 in Column and Line Array PA Speakers |
| Rigging | 2 x M10 inserts in base and lid; 4 x M10 rear inserts | - |
| Passive | Yes | Yes |
| 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) |
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