Short answer: choose between the JBL PRX912 and RCF ART 745-A MK4 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 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.
Why choose the RCF ART 745-A MK4. The largest ART7 compression driver, 133dB claimed peak and a light 18.8kg enclosure give this discontinued flagship useful vocal headroom for a 15-inch box.
What to weigh before buying. Its 5.16 ideal-subwoofer preference score trails the QSC and FBT ProMaxX, with less even sound-power behavior in the supplied data. At 19.5kg it is not especially light, and Bluetooth is for control rather than audio streaming. The low-quality vendor data is truncated and does not yield a preference score. It is discontinued and is eclipsed by the better-supported ART 745-A MK5.
Buy the JBL PRX912 when its stated coverage, output, processing, and installation format fit the job better.
Buy the RCF ART 745-A MK4 when its stated strengths better suit the venue and the rest of the system.
Specifications Side By Side
| JBL PRX912 | RCF ART 745-A MK4 | |
|---|---|---|
| Price | $999.00 | $1,699.00 |
| Ranked | #5 of 37 in 12-Inch Two-Way Powered PA Speakers | #21 of 29 in 15-Inch Two-Way Powered PA Speakers |
| Configuration | Active 2-way bass-reflex PA speaker | Active 2-way bass-reflex PA speaker |
| Drivers | 12" woofer, 1.5" compression driver | 15" woofer, 1.4" exit/3" diaphragm compression driver |
| Frequency Response | 50Hz - 20kHz (-10dB, manufacturer specified) | 45Hz - 20kHz (manufacturer specified) |
| Bass Extension (-3dB) | 54Hz (measured, vendor Spinorama data) | 65Hz (measured, vendor Spinorama data) |
| Coverage | 90° x 50° | 100° x 60° |
| Maximum SPL | 132dB peak (manufacturer specified) | 133dB peak (manufacturer specified) |
| Inputs | 2 x XLR/TRS combo, 3.5mm aux | XLR/jack combo input; XLR output |
| App | Yes (JBL Pro Connect) | - |
| DSP | Yes | Yes, FiRPHASE, EQ, limiting and protection |
| Bluetooth | Control only; no Bluetooth audio | No |
| Weight | 43 lbs / 19.5 kg | 41.4 lbs / 18.8 kg |
| Dimensions | 25"H x 15.5"W x 13.1"D (636 x 394 x 332 mm) | 27.9"H x 17.4"W x 15.2"D (708 x 442 x 387 mm) |
| Amplifier Power | 2000W peak / 1000W RMS | 1,400W peak / 700W RMS (1,000W LF + 400W HF peak, manufacturer specified) |
| Crossover Frequency | 1920Hz | 650Hz (manufacturer specified) |
| Cabinet Material | Polypropylene/talc composite | Polypropylene composite |
| Rigging | 6 x M10 suspension points; dual 36mm pole sockets | M10 fly points; pole mount |
Related Speaker Comparisons
A few more comparisons worth a look in the same class:
- Vue Audiotechnik A-15 vs LD Systems Stinger 15-A-G3
- FBT J15A vs Martin Audio XP15
- RCF ART 745-A MK5 vs LD Systems Stinger 15-A-G3
- RCF ART 745-A MK4 vs FBT J15A
- JBL PRX915 vs RCF ART 745-A MK4
Prices on this page were last checked September 7, 2026 at 7:47 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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The Two Speakers In Full
JBL PRX912: $999.00 Amazon B&H Photo Video Guitar Center eBay
Pros: 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.
Cons: Its 5.16 ideal-subwoofer preference score trails the QSC and FBT ProMaxX, with less even sound-power behavior in the supplied data. At 19.5kg it is not especially light, and Bluetooth is for control rather than audio streaming.
Full JBL PRX912 review and specifications →
| Amplifier Power | 2000W peak / 1000W RMS |
|---|---|
| App | Yes (JBL Pro Connect) |
| Bass Extension (-3dB) | 54Hz (measured, vendor Spinorama data) |
| Bluetooth | Control only; no Bluetooth audio |
| Cabinet Material | Polypropylene/talc composite |
| Configuration | Active 2-way bass-reflex PA speaker |
| Coverage | 90° x 50° |
| Crossover Frequency | 1920Hz |
| DSP | Yes |
| Dimensions | 25"H x 15.5"W x 13.1"D (636 x 394 x 332 mm) |
| Drivers | 12" woofer, 1.5" compression driver |
| Frequency Response | 50Hz - 20kHz (-10dB, manufacturer specified) |
| Inputs | 2 x XLR/TRS combo, 3.5mm aux |
| Maximum SPL | 132dB peak (manufacturer specified) |
| Rigging | 6 x M10 suspension points; dual 36mm pole sockets |
| Weight | 43 lbs / 19.5 kg |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
RCF ART 745-A MK4: $1,699.00 Amazon B&H Photo Video Guitar Center eBay
Pros: The largest ART7 compression driver, 133dB claimed peak and a light 18.8kg enclosure give this discontinued flagship useful vocal headroom for a 15-inch box.
Cons: The low-quality vendor data is truncated and does not yield a preference score. It is discontinued and is eclipsed by the better-supported ART 745-A MK5.
Full RCF ART 745-A MK4 review and specifications →
| Amplifier Power | 1,400W peak / 700W RMS (1,000W LF + 400W HF peak, manufacturer specified) |
|---|---|
| Bass Extension (-3dB) | 65Hz (measured, vendor Spinorama data) |
| Bluetooth | No |
| Cabinet Material | Polypropylene composite |
| Configuration | Active 2-way bass-reflex PA speaker |
| Coverage | 100° x 60° |
| Crossover Frequency | 650Hz (manufacturer specified) |
| DSP | Yes, FiRPHASE, EQ, limiting and protection |
| Dimensions | 27.9"H x 17.4"W x 15.2"D (708 x 442 x 387 mm) |
| Drivers | 15" woofer, 1.4" exit/3" diaphragm compression driver |
| Frequency Response | 45Hz - 20kHz (manufacturer specified) |
| Inputs | XLR/jack combo input; XLR output |
| Maximum SPL | 133dB peak (manufacturer specified) |
| Rigging | M10 fly points; pole mount |
| Weight | 41.4 lbs / 18.8 kg |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- RCF ART 745-A MK4 vs LD Systems Stinger 15-A-G3
- RCF ART 745-A MK4 vs FBT J15A
- RCF ART 745-A MK4 vs Vue Audiotechnik A-15
- RCF ART 745-A MK4 vs Martin Audio XP15
- RCF ART 745-A MK4 vs RCF ART 745-A MK5
- RCF ART 745-A MK4 vs RCF ART 735-A MK4
- RCF ART 745-A MK4 vs RCF NX 915-A
- RCF ART 745-A MK4 vs RCF ART 715-A MK5
- See all 19 comparisons