Short answer: these RCF KX 45-A and RCF NX 915-A alternatives share a brand and size class, but their coverage, driver architecture, cabinet format, processing, and output priorities can make them fit very different jobs.
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 RCF NX 915-A. The plywood enclosure, FiRPHASE/Bass Motion Control processing and flexible rigging make it a sturdier systems alternative to the ART 715-A MK5, with a wide 100° x 60° pattern and 131dB claimed peak.
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. The truncated vendor measurement does not yield a preference score, preventing a confident tonal comparison with the scored leaders. At 24.1kg it is notably heavier than the ART-series alternatives.
Buy the RCF KX 45-A when its stated coverage, output, processing, and deployment format best match the job.
Buy the RCF NX 915-A 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 | RCF NX 915-A | |
|---|---|---|
| Price | $4,620.00 | $1,541.00 |
| Ranked | #3 of 29 in 15-Inch Two-Way Powered PA Speakers | #17 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, compression driver |
| Frequency Response | 50Hz - 20kHz (manufacturer specified) | 45Hz - 20kHz (manufacturer specified) |
| Dimensions | 27.8"H x 16.5"W x 16.9"D (705 x 419.6 x 430 mm) | 27.8"H x 16.5"W x 17.7"D (705 x 419.6 x 450.4 mm) |
| Coverage | 100° x 70°, rotatable | 100° x 60° |
| Maximum SPL | 137dB peak (manufacturer specified) | 131dB peak (manufacturer specified) |
| Inputs | XLR audio input/link and EtherCON RDNet | XLR/TRS combo input and XLR output |
| Amplifier Power | 3200W peak (2000W LF + 1200W HF) | 2100W peak (1400W LF + 700W HF) |
| Crossover Frequency | 750Hz | 1600Hz |
| Cabinet Material | Baltic birch plywood | Polyurea-coated plywood |
| Rigging | Quick-lock rigging; 6 x M10 inserts; 35mm pole mount | 6 x M10 inserts |
| Network Control | RDNet | - |
| DSP | Yes, FiRPHASE, Bass Motion Control, presets and RDNet | Yes, FiRPHASE and Bass Motion Control |
| Bluetooth | No | No |
| Weight | 62.6 lbs / 28.4 kg | 53.1 lbs / 24.1 kg |
| Bass Extension (-3dB) | - | 53Hz (measured, vendor Spinorama data) |
Related Speaker Comparisons
A few more comparisons worth a look in the same class:
- RCF ART 945-A vs Vue Audiotechnik H-15
- Vue Audiotechnik H-15 vs HK Audio LINEAR 7 115 FA
- Vue Audiotechnik H-15 vs RCF NX 945-A
- RCF KX 45-A vs RCF ART 935-A
- RCF KX 45-A 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
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
RCF NX 915-A: $1,541.00 Amazon B&H Photo Video Guitar Center eBay
Pros: The plywood enclosure, FiRPHASE/Bass Motion Control processing and flexible rigging make it a sturdier systems alternative to the ART 715-A MK5, with a wide 100° x 60° pattern and 131dB claimed peak.
Cons: The truncated vendor measurement does not yield a preference score, preventing a confident tonal comparison with the scored leaders. At 24.1kg it is notably heavier than the ART-series alternatives.
Full RCF NX 915-A review and specifications →
| Amplifier Power | 2100W peak (1400W LF + 700W HF) |
|---|---|
| Bass Extension (-3dB) | 53Hz (measured, vendor Spinorama data) |
| Bluetooth | No |
| Cabinet Material | Polyurea-coated plywood |
| Configuration | Active 2-way bass-reflex PA speaker |
| Coverage | 100° x 60° |
| Crossover Frequency | 1600Hz |
| DSP | Yes, FiRPHASE and Bass Motion Control |
| Dimensions | 27.8"H x 16.5"W x 17.7"D (705 x 419.6 x 450.4 mm) |
| Drivers | 15" woofer, compression driver |
| Frequency Response | 45Hz - 20kHz (manufacturer specified) |
| Inputs | XLR/TRS combo input and XLR output |
| Maximum SPL | 131dB peak (manufacturer specified) |
| Rigging | 6 x M10 inserts |
| Weight | 53.1 lbs / 24.1 kg |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- RCF NX 915-A vs RCF ART 715-A MK5
- RCF NX 915-A vs RCF ART 745-A MK5
- RCF NX 915-A vs Electro-Voice MFX-15MC
- RCF NX 915-A vs Vue Audiotechnik A-15
- RCF NX 915-A vs Yamaha DXR15mkII
- RCF NX 915-A vs RCF ART 745-A MK4
- RCF NX 915-A vs Yamaha DXR15mkIII
- RCF NX 915-A vs RCF ART 735-A MK4
- See all 17 comparisons