Short answer: the Alcons Audio QRP20. It ranks #9 of 33 column and line array PA speakers by sound quality, rated 3.6/5, at $4,200. The Coda Audio CoRay4 ranks #26, rated 3.0/5, at $2,380, $1,820 cheaper, a saving that is not big enough to make up the sound-quality gap.
The Alcons Audio QRP20 is the more accurate option. A slim ribbon column with high output and a choice of wide horizontal coverage, built for discreet installs. Its measured preference score, a predictor of how neutral it sounds, is 3.38 against 1.96 for the Coda Audio CoRay4. The tradeoff: Bass reaches only 90Hz at -3dB and about 81Hz at -10dB, so it needs a subwoofer for music.
The case for the Coda Audio CoRay4: A touring and installation column with planar wave drivers and very high peak output, and columns link into longer arrays for big venues. The catch: High-quality manufacturer measurements give a low 1.96 standalone preference score and 5.04 with an ideal subwoofer, with a 0.619 listening-window deviation, so tonal balance is uneven.
Buy the Alcons Audio QRP20. It is rated higher for sound quality, and saving $1,820 with the Coda Audio CoRay4 does not make up for the sound-quality gap.
Looking for alternatives? See the complete PA & Live Sound rankings.
Prices on this page were last checked November 11, 2026 at 3:26 AM 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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| Alcons Audio QRP20 | Coda Audio CoRay4 | |
|---|---|---|
| Price | $4,200 Passive | $2,380 Passive |
| Ranked | #9 of 33 in Column and Line Array PA Speakers | #26 of 33 in Column and Line Array PA Speakers |
| Rigging | M10 inserts top and bottom; M6 bracket pattern on back | CODA mobile suspension and flange adapter; optional CF4 flying frame |
| Passive | Yes | Yes |
| Configuration | Passive 2-way point-source column (pro-ribbon) | Passive 2-way line source column (requires Coda controller) |
| Drivers | 1x 4” RBN401 pro-ribbon driver, 4x 5” woofers (sealed) | 2x 4” neodymium planar wave drivers, 4x 5” woofers |
| Frequency Response | 72Hz - 20kHz (±3dB, manufacturer specified) | 80Hz - 20kHz (-6dB, manufacturer specified) |
| Dimensions | 29.2”H x 5.9”W x 5.9”D (742 x 150 x 150 mm) | 29.8”H x 6”W x 8.4”D (758 x 152 x 214 mm) |
| Amplifier Power | Passive speaker; requires external amplification (Alcons Sentinel) | Passive speaker; requires a Coda Audio LINUS amplifier/controller |
| Maximum SPL | 128dB peak (manufacturer specified) | 144dB peak (manufacturer specified) |
| Coverage | 90° x 15° (120° version available) | 120°, 60° or 90° asymmetric horizontal x 12° vertical |
| Sensitivity | 99dB (200Hz - 10kHz) | 97dB |
| Impedance | 4 ohms | 4 ohms |
| DSP | No (passive) | No (passive) |
| Weight | 26.5 lbs (12 kg) | 34.6 lbs (15.7 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) | 90Hz (measured, vendor Spinorama data) | 82.5Hz (measured, vendor Spinorama data) |
| Bass Extension (-10dB) | about 80.8Hz (measured, vendor Spinorama data) | about 71.6Hz (measured, vendor Spinorama data) |
| Spinorama Preference Score | 3.38 | 1.96 |
| Spinorama Preference Score with Perfect Sub | 6.69 | 5.04 |
| Power Handling | - | 700W AES / 2,800W peak |
Related Speaker Comparisons
More top alternatives to Alcons Audio QRP20: