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. The RCF ART 745-A MK4 is discontinued; its replacement is the RCF ART 745-A MK5.
Why choose the JBL PRX915. High-quality vendor data shows a 4.77 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 41.4 lbs (18.8 kg) 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 53.1 lbs (24.1 kg) 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.
Still deciding? The full PA & Live Sound rankings cover every ranked option.
A powered 15 inch PA speaker with good sound, fairly deep bass, app control and built in EQ and feedback suppression.
A discontinued 15 inch powered PA speaker with a large compression driver for strong vocal headroom in a fairly light cabinet.
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Specifications Side By Side
| JBL PRX915 | RCF ART 745-A MK4 | |
|---|---|---|
| Price | $999.00 | $1,699.00 Discontinued |
| Ranked | #15 of 76 in 15-Inch PA Speakers | #44 of 76 in 15-Inch PA Speakers |
| Passive | No | No |
| 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) |
| Spinorama Preference Score | 2.40 | - |
| Spinorama Preference Score with Perfect Sub | 4.77 | - |
| XLR Input | Yes | Yes |
| RCA Input | No | No |
| TRS Input | Yes | Yes |
| Optical Input | No | No |
| Coaxial Input | No | No |
| USB Input | No | No |
| HDMI Input | No | No |
| AES Input | No | No |
| Aux Input | Yes | No |
| Microphone Input | No | No |
| Guitar Input | No | No |
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: JBL PRX915 (measured by the manufacturer) and RCF ART 745-A MK4 (measured by the manufacturer), via spinorama.org.
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