Short answer: these RCF NX 915-A and RCF ART 745-A MK4 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 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.
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. 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. 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 RCF NX 915-A 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
| RCF NX 915-A | RCF ART 745-A MK4 | |
|---|---|---|
| Price | $1,541.00 | $1,699.00 |
| Ranked | #17 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, compression driver | 15" woofer, 1.4" exit/3" diaphragm compression driver |
| Frequency Response | 45Hz - 20kHz (manufacturer specified) | 45Hz - 20kHz (manufacturer specified) |
| Dimensions | 27.8"H x 16.5"W x 17.7"D (705 x 419.6 x 450.4 mm) | 27.9"H x 17.4"W x 15.2"D (708 x 442 x 387 mm) |
| Coverage | 100° x 60° | 100° x 60° |
| Maximum SPL | 131dB peak (manufacturer specified) | 133dB peak (manufacturer specified) |
| Inputs | XLR/TRS combo input and XLR output | XLR/jack combo input; XLR output |
| Amplifier Power | 2100W peak (1400W LF + 700W HF) | 1,400W peak / 700W RMS (1,000W LF + 400W HF peak, manufacturer specified) |
| Crossover Frequency | 1600Hz | 650Hz (manufacturer specified) |
| Cabinet Material | Polyurea-coated plywood | Polypropylene composite |
| Rigging | 6 x M10 inserts | M10 fly points; pole mount |
| Bass Extension (-3dB) | 53Hz (measured, vendor Spinorama data) | 65Hz (measured, vendor Spinorama data) |
| DSP | Yes, FiRPHASE and Bass Motion Control | Yes, FiRPHASE, EQ, limiting and protection |
| Bluetooth | No | No |
| Weight | 53.1 lbs / 24.1 kg | 41.4 lbs / 18.8 kg |
Related Speaker Comparisons
Other pairings from the same speaker class worth checking:
- Vue Audiotechnik A-15 vs LD Systems Stinger 15-A-G3
- RCF ART 945-A vs RCF ART 745-A MK5
- RCF NX 945-A vs RCF ART 715-A MK5
- RCF ART 935-A vs RCF ART 745-A MK4
- RCF ART 745-A MK4 vs Martin Audio XP15
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.
As an eBay Partner, we may be compensated if you make a purchase.
The Two Speakers In Full
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 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 ART 715-A MK5
- RCF ART 745-A MK4 vs RCF ART 715-A MK4
- See all 19 comparisons