Short answer: choose between the RCF KX 08-A and JBL PRX912 by matching the speaker to the deployment rather than treating their ranking positions as a universal verdict. Coverage, cabinet format, bass extension, output capability, DSP, and service support all matter in a PA system.
Why choose the RCF KX 08-A. The entry point into RCF’s flagship KX point-source range, with a 2000W amplifier, a PKX-dome neodymium compression driver, RDNet remote control and a rotatable 90° x 70° horn in a manageable 27.6 lbs (12.5 kg) cabinet.
Why choose the JBL PRX912. High-quality manufacturer Spinorama data, 132dB claimed peak output, app control and unusually deep onboard processing make this one of the most versatile choices. The measured 54Hz bass extension is useful for speech and lighter music without a subwoofer.
What to weigh before buying. The local measurement is truncated and cannot produce a preference score, and pricing/retail availability are not yet well established for this model. Its 6.05 ideal-subwoofer preference score trails the QSC and FBT ProMaxX, with less even sound-power behavior in the supplied data. At 43 lbs (19.5 kg) it is not especially light, and Bluetooth is for control rather than audio streaming.
Buy the RCF KX 08-A when its stated coverage, output, processing, and installation format fit the job better.
Buy the JBL PRX912 when its stated strengths better suit the venue and the rest of the system.
Want more options? Browse the full PA & Live Sound rankings.
A powerful 8 inch point source PA speaker with remote network control and a rotatable horn in a manageable cabinet.
A versatile, loud 12 inch powered PA speaker with app control, deep onboard processing and enough bass for speech and lighter music.
Prices on this page were last checked October 23, 2026 at 8:27 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.
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Specifications Side By Side
| RCF KX 08-A | JBL PRX912 | |
|---|---|---|
| Price | $2,308.50 | $899.00 |
| Ranked | #8 of 47 in 8-Inch PA Speakers | #6 of 83 in 12-Inch PA Speakers |
| Passive | No | No |
| Configuration | Active 2-way bass-reflex point-source PA speaker | Active 2-way bass-reflex PA speaker |
| Drivers | 8” woofer, 1.75” voice-coil neodymium compression driver | 12” woofer, 1.5” compression driver |
| Frequency Response | 65Hz - 20kHz (manufacturer specified) | 50Hz - 20kHz (-10dB, manufacturer specified) |
| Dimensions | 17.7”H x 10.2”W x 11.2”D (450 x 260 x 285.4 mm) | 25”H x 15.5”W x 13.1”D (636 x 394 x 332 mm) |
| Coverage | 90° x 70°, rotatable | 90° x 50° |
| Maximum SPL | 128dB peak (manufacturer specified) | 132dB peak (manufacturer specified) |
| Inputs | XLR and EtherCON RDNet input/link | 2 x XLR/TRS combo, 3.5mm aux |
| Amplifier Power | 2000W peak (1400W LF + 600W HF) | 2000W peak / 1000W RMS |
| Crossover Frequency | 1400Hz | 1920Hz |
| Cabinet Material | Baltic birch plywood | Polypropylene/talc composite |
| Rigging | M10 inserts; 35mm pole mount | 6 x M10 suspension points; dual 36mm pole sockets |
| Network Control | RDNet | - |
| Bass Extension (-3dB) | 82.5Hz (measured, vendor Spinorama data) | 54Hz (measured, vendor Spinorama data) |
| DSP | Yes, RDNet remote management | Yes |
| Bluetooth | No | Control only; no Bluetooth audio |
| Weight | 24.3 lbs (11 kg) | 43 lbs (19.5 kg) |
| XLR Input | Yes | Yes |
| RCA Input | No | No |
| TRS Input | No | Yes |
| Optical Input | No | No |
| Coaxial Input | No | No |
| USB Input | No | No |
| HDMI Input | No | No |
| AES Input | No | No |
| Aux Input | No | Yes |
| Microphone Input | No | No |
| Guitar Input | No | No |
| App | - | Yes (JBL Pro Connect) |
| Spinorama Preference Score | - | 3.57 |
| Spinorama Preference Score with Perfect Sub | - | 6.05 |
Frequency Response Compared
Both speakers’ spinorama measurements, overlaid. A flatter line is more neutral: peaks sound forward or harsh, dips sound recessed. Each curve is shifted so its average from 300 Hz to 3 kHz sits at 0 dB, so loudness differences between the two are removed and only the shape is compared.
Measurement data: RCF KX 08-A (measured by the manufacturer) and JBL PRX912 (measured by the manufacturer), via spinorama.org.
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