Short answer: the Kling Freitag CA 106 Pro. It ranks #13 of 16 compact 5 to 6.5-inch pa speakers by sound quality (rated 3.5/5); the Alcons Audio SR9 ranks #16 (rated 3.2/5).
The case for the Kling Freitag CA 106 Pro: High-quality manufacturer measurements give a 5.73 preference score with an ideal subwoofer, with a 2.5dB reference band and even 90° x 60° coverage from a rotatable constant-directivity horn. Watch for: Bass rolls off early, about 69Hz at -10dB, so it needs a subwoofer for music, and its 125dB peak output suits near-field and moderate-distance use rather than large rooms.
The case for the Alcons Audio SR9: High-quality vendor Spinorama data gives preference scores of 2.46 standalone and 6.18 with an ideal subwoofer. The tradeoff: Bass reaches only about 150Hz (-3dB), the shallowest of the group, so it is a fill and speech box that depends on a subwoofer.
Buy the Kling Freitag CA 106 Pro. It is rated higher for sound quality than the Alcons Audio SR9.
Looking for alternatives? See the complete PA & Live Sound rankings.
Specifications Side By Side
| Kling Freitag CA 106 Pro | Alcons Audio SR9 | |
|---|---|---|
| Price | - | - |
| Ranked | #13 of 16 in Compact 5 to 6.5-Inch PA Speakers | #16 of 16 in Compact 5 to 6.5-Inch PA Speakers |
| Configuration | Passive 2-way compact PA speaker | Passive 2-way ribbon-fill PA speaker |
| Drivers | 6.5” woofer, 1” exit compression driver on rotatable CD horn | Dual 5” sealed woofers, RBN401 pro-ribbon |
| Frequency Response | 73Hz - 20kHz (±3dB, manufacturer specified) | - |
| Amplifier Power | Passive speaker; requires external amplification | Passive speaker; requires external amplification within the 800W peak handling rating |
| Power Handling | 200W nominal / 400W program / 600W peak | 800W peak (manufacturer specified) |
| Maximum SPL | 125dB peak (manufacturer specified) | - |
| Coverage | 90° x 60° (rotatable) | 120° horizontal x 15° vertical |
| Impedance | 16 ohms | - |
| Cabinet Material | 12mm multiplex | - |
| DSP | No (passive) | No (passive) |
| Weight | 14.8 lbs (6.7 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) | 132Hz (measured, vendor Spinorama data) | 150Hz (measured, vendor Spinorama data) |
| Bass Extension (-10dB) | about 68.9Hz (measured, vendor Spinorama data) | - |
| Spinorama Preference Score | 2.53 | 2.46 |
| Spinorama Preference Score with Perfect Sub | 5.73 | 6.18 |
Related Speaker Comparisons
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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 CA 106 Pro Passive eBay
Pros: High-quality manufacturer measurements give a 5.73 preference score with an ideal subwoofer, with a 2.5dB reference band and even 90° x 60° coverage from a rotatable constant-directivity horn. The 6.5-inch woofer and 1-inch compression driver sit in a 6.7kg multiplex cabinet, and the 16 ohm load lets several cabinets share one amplifier channel for distributed systems. Measured bass extension of 132Hz (-3dB).
Cons: Bass rolls off early, about 69Hz at -10dB, so it needs a subwoofer for music, and its 125dB peak output suits near-field and moderate-distance use rather than large rooms. A 4.71 directivity-index deviation means off-axis tone varies. It is passive and sold only through pro dealers with no published price.
Full Kling Freitag CA 106 Pro review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | Passive speaker; requires external amplification |
| Aux Input | No |
| Bass Extension (-10dB) | about 68.9Hz (measured, vendor Spinorama data) |
| Bass Extension (-3dB) | 132Hz (measured, vendor Spinorama data) |
| Bluetooth | No |
| Cabinet Material | 12mm multiplex |
| Coaxial Input | No |
| Configuration | Passive 2-way compact PA speaker |
| Coverage | 90° x 60° (rotatable) |
| DSP | No (passive) |
| Drivers | 6.5” woofer, 1” exit compression driver on rotatable CD horn |
| Frequency Response | 73Hz - 20kHz (±3dB, manufacturer specified) |
| Guitar Input | No |
| HDMI Input | No |
| Impedance | 16 ohms |
| Maximum SPL | 125dB peak (manufacturer specified) |
| Microphone Input | No |
| Optical Input | No |
| Power Handling | 200W nominal / 400W program / 600W peak |
| RCA Input | No |
| Spinorama Preference Score | 2.53 |
| Spinorama Preference Score with Perfect Sub | 5.73 |
| TRS Input | No |
| USB Input | No |
| Weight | 14.8 lbs (6.7 kg) |
| XLR Input | No |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Alcons Audio SR9 Passive eBay
Pros: High-quality vendor Spinorama data gives preference scores of 2.46 standalone and 6.18 with an ideal subwoofer. The RBN401 pro-ribbon and 120° horizontal pattern make it a discreet ribbon-fill and front-fill box, and the sealed woofers give a smooth roll-off. Measured bass extension of 150Hz (-3dB).
Cons: Bass reaches only about 150Hz (-3dB), the shallowest of the group, so it is a fill and speech box that depends on a subwoofer. It is passive, listening-window narrow-band deviation is 0.463, and the very narrow 15° vertical pattern limits placement.
Full Alcons Audio SR9 review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | Passive speaker; requires external amplification within the 800W peak handling rating |
| Aux Input | No |
| Bass Extension (-3dB) | 150Hz (measured, vendor Spinorama data) |
| Bluetooth | No |
| Coaxial Input | No |
| Configuration | Passive 2-way ribbon-fill PA speaker |
| Coverage | 120° horizontal x 15° vertical |
| DSP | No (passive) |
| Drivers | Dual 5” sealed woofers, RBN401 pro-ribbon |
| Guitar Input | No |
| HDMI Input | No |
| Microphone Input | No |
| Optical Input | No |
| Power Handling | 800W peak (manufacturer specified) |
| RCA Input | No |
| Spinorama Preference Score | 2.46 |
| Spinorama Preference Score with Perfect Sub | 6.18 |
| TRS Input | No |
| USB Input | No |
| XLR Input | No |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons