Short answer: choose between the RCF KX 45-A and JBL PRX915 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 RCF KX 45-A. RCF’s flagship 15-inch point source pairs a 3200W amplifier with a 3-inch titanium-dome compression driver, RDNet remote control and a 137dB claimed peak, the highest maximum-output claim in this ranking. Rotatable 100° x 70° coverage suits both main and monitor use.
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.
What to weigh before buying. The local measurement is truncated and cannot produce a preference score. At 28.4kg it is one of the heaviest boxes here, and pricing/retail availability are not yet established. 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.
Buy the RCF KX 45-A when its stated coverage, output, processing, and deployment format best match the job.
Buy the JBL PRX915 when its stated strengths are the better match for the room and the rest of the PA.
Specifications Side By Side
| RCF KX 45-A | JBL PRX915 | |
|---|---|---|
| Price | $4,620.00 | $1,099.00 |
| Ranked | #3 of 29 in 15-Inch Two-Way Powered PA Speakers | #8 of 29 in 15-Inch Two-Way Powered PA Speakers |
| Configuration | Active 2-way bass-reflex point-source PA speaker | Active 2-way bass-reflex PA speaker |
| Drivers | 15" neodymium woofer, 1.4" exit/3" dome compression driver | 15" woofer, 1.5" compression driver |
| Frequency Response | 50Hz - 20kHz (manufacturer specified) | 48Hz - 19kHz (-10dB, manufacturer specified) |
| Dimensions | 27.8"H x 16.5"W x 16.9"D (705 x 419.6 x 430 mm) | 28.2"H x 18.3"W x 15.1"D (717 x 465 x 383 mm) |
| Coverage | 100° x 70°, rotatable | 90° x 50° |
| Maximum SPL | 137dB peak (manufacturer specified) | 133dB peak (manufacturer specified) |
| Inputs | XLR audio input/link and EtherCON RDNet | 2 x XLR/TRS combo, 3.5mm aux; 2 x XLR thru and XLR mix outputs |
| Amplifier Power | 3200W peak (2000W LF + 1200W HF) | 2000W peak / 1000W RMS |
| Crossover Frequency | 750Hz | 1920Hz |
| Cabinet Material | Baltic birch plywood | Polypropylene/talc composite |
| Rigging | Quick-lock rigging; 6 x M10 inserts; 35mm pole mount | 6 x M10 suspension points; dual 36mm pole sockets |
| Network Control | RDNet | - |
| DSP | Yes, FiRPHASE, Bass Motion Control, presets and RDNet | Yes, 12-band parametric EQ and dbx DriveRack |
| Bluetooth | No | Yes, control via JBL Pro Connect app |
| Weight | 62.6 lbs / 28.4 kg | 53.1 lbs / 24.1 kg |
| Bass Extension (-3dB) | - | 58Hz (measured, vendor Spinorama data) |
Related Speaker Comparisons
Other pairings from the same speaker class worth checking:
- KV2 Audio EX15 vs Yamaha DZR15
- HK Audio LINEAR 7 115 FA vs RCF NX 945-A
- RCF ART 945-A vs Vue Audiotechnik H-15
- RCF KX 45-A vs Yamaha DXR15mkIII
- RCF KX 45-A vs Yamaha DZR15
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
RCF KX 45-A: $4,620.00 B&H Photo Video Guitar Center eBay
Pros: RCF’s flagship 15-inch point source pairs a 3200W amplifier with a 3-inch titanium-dome compression driver, RDNet remote control and a 137dB claimed peak, the highest maximum-output claim in this ranking. Rotatable 100° x 70° coverage suits both main and monitor use.
Cons: The local measurement is truncated and cannot produce a preference score. At 28.4kg it is one of the heaviest boxes here, and pricing/retail availability are not yet established.
Full RCF KX 45-A review and specifications →
| Amplifier Power | 3200W peak (2000W LF + 1200W HF) |
|---|---|
| Bluetooth | No |
| Cabinet Material | Baltic birch plywood |
| Configuration | Active 2-way bass-reflex point-source PA speaker |
| Coverage | 100° x 70°, rotatable |
| Crossover Frequency | 750Hz |
| DSP | Yes, FiRPHASE, Bass Motion Control, presets and RDNet |
| Dimensions | 27.8"H x 16.5"W x 16.9"D (705 x 419.6 x 430 mm) |
| Drivers | 15" neodymium woofer, 1.4" exit/3" dome compression driver |
| Frequency Response | 50Hz - 20kHz (manufacturer specified) |
| Inputs | XLR audio input/link and EtherCON RDNet |
| Maximum SPL | 137dB peak (manufacturer specified) |
| Network Control | RDNet |
| Rigging | Quick-lock rigging; 6 x M10 inserts; 35mm pole mount |
| Weight | 62.6 lbs / 28.4 kg |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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