Short answer: choose between the JBL PRX915 and RCF ART 745-A MK4 for the requirements of the venue and system, not from rank alone. In this size class, coverage, bass extension, output capability, DSP, cabinet construction, and service support often decide the better fit.
Why choose the JBL PRX915. High-quality vendor data shows a 4.02 ideal-subwoofer preference score with 51Hz measured extension, backed by JBL’s extensive service network and 12-band parametric EQ with dbx DriveRack feedback suppression carried over from the PRX912.
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 measured preference trails the 12-inch PRX912, and at 24.1kg it is meaningfully heavier to carry to a gig than the smaller model. 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 PRX915 when its stated coverage, output, processing, and deployment format best match the job.
Buy the RCF ART 745-A MK4 when its stated strengths are the better match for the room and the rest of the PA.
Specifications Side By Side
| JBL PRX915 | RCF ART 745-A MK4 | |
|---|---|---|
| Price | $1,099.00 | $1,699.00 |
| Ranked | #8 of 29 in 15-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 | 15" woofer, 1.5" compression driver | 15" woofer, 1.4" exit/3" diaphragm compression driver |
| Frequency Response | 48Hz - 19kHz (-10dB, manufacturer specified) | 45Hz - 20kHz (manufacturer specified) |
| Dimensions | 28.2"H x 18.3"W x 15.1"D (717 x 465 x 383 mm) | 27.9"H x 17.4"W x 15.2"D (708 x 442 x 387 mm) |
| Maximum SPL | 133dB peak (manufacturer specified) | 133dB peak (manufacturer specified) |
| Inputs | 2 x XLR/TRS combo, 3.5mm aux; 2 x XLR thru and XLR mix outputs | XLR/jack combo input; XLR output |
| 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 |
| Coverage | 90° x 50° | 100° x 60° |
| Bass Extension (-3dB) | 58Hz (measured, vendor Spinorama data) | 65Hz (measured, vendor Spinorama data) |
| DSP | Yes, 12-band parametric EQ and dbx DriveRack | Yes, FiRPHASE, EQ, limiting and protection |
| Bluetooth | Yes, control via JBL Pro Connect app | No |
| Weight | 53.1 lbs / 24.1 kg | 41.4 lbs / 18.8 kg |
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- Yamaha DZR15 vs RCF NX 915-A
- RCF NX 912-A vs Yamaha DZR15
- Yamaha DXR15mkIII vs RCF ART 745-A MK4
- RCF ART 745-A MK4 vs FBT J15A
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 PRX915: $1,099.00 Amazon B&H Photo Video Guitar Center eBay
Pros: High-quality vendor data shows a 4.02 ideal-subwoofer preference score with 51Hz measured extension, backed by JBL’s extensive service network and 12-band parametric EQ with dbx DriveRack feedback suppression carried over from the PRX912.
Cons: Its measured preference trails the 12-inch PRX912, and at 24.1kg it is meaningfully heavier to carry to a gig than the smaller model.
Full JBL PRX915 review and specifications →
| Amplifier Power | 2000W peak / 1000W RMS |
|---|---|
| Bass Extension (-3dB) | 58Hz (measured, vendor Spinorama data) |
| Bluetooth | Yes, control via JBL Pro Connect app |
| Cabinet Material | Polypropylene/talc composite |
| Configuration | Active 2-way bass-reflex PA speaker |
| Coverage | 90° x 50° |
| Crossover Frequency | 1920Hz |
| DSP | Yes, 12-band parametric EQ and dbx DriveRack |
| Dimensions | 28.2"H x 18.3"W x 15.1"D (717 x 465 x 383 mm) |
| Drivers | 15" woofer, 1.5" compression driver |
| Frequency Response | 48Hz - 19kHz (-10dB, manufacturer specified) |
| Inputs | 2 x XLR/TRS combo, 3.5mm aux; 2 x XLR thru and XLR mix outputs |
| Maximum SPL | 133dB peak (manufacturer specified) |
| Rigging | 6 x M10 suspension points; dual 36mm pole sockets |
| Weight | 53.1 lbs / 24.1 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