Short answer: these RCF KX 45-A and RCF ART 735-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 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 ART 735-A MK4. Its large 3-inch compression-driver voice coil, 132dB claimed peak and roughly 53Hz measured extension give it useful vocal headroom and bass reach. The 21.4kg enclosure remains manageable for a 15-inch box.
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 low-quality vendor data is truncated and does not yield a preference score. It is discontinued and eclipsed by current 9-series and MK5 models.
Buy the RCF KX 45-A when its stated coverage, output, processing, and deployment format best match the job.
Buy the RCF ART 735-A MK4 when its stated strengths are the better match for the room and the rest of the PA.
Skip the RCF ART 735-A MK4 if sound quality matters to you. It ranks near the bottom of the 29 15-inch two-way powered pa speakers.
Specifications Side By Side
| RCF KX 45-A | RCF ART 735-A MK4 | |
|---|---|---|
| Price | $4,620.00 | $888.00 |
| Ranked | #3 of 29 in 15-Inch Two-Way Powered PA Speakers | #24 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, 1.4" compression driver with 3" voice coil |
| 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) | 27.9"H x 17.2"W x 15.3"D (708 x 437 x 389 mm) |
| Coverage | 100° x 70°, rotatable | 100° x 60° |
| Maximum SPL | 137dB peak (manufacturer specified) | 132dB peak (manufacturer specified) |
| Inputs | XLR audio input/link and EtherCON RDNet | XLR/jack combo input; XLR output |
| Amplifier Power | 3200W peak (2000W LF + 1200W HF) | 1,400W peak / 700W RMS (1,000W LF + 400W HF peak, manufacturer specified) |
| Crossover Frequency | 750Hz | 800Hz (manufacturer specified) |
| Cabinet Material | Baltic birch plywood | Polypropylene composite |
| Rigging | Quick-lock rigging; 6 x M10 inserts; 35mm pole mount | Two M10 fly points; pole mount |
| Network Control | RDNet | - |
| DSP | Yes, FiRPHASE, Bass Motion Control, presets and RDNet | Yes, FiRPHASE, EQ, limiting and protection |
| Bluetooth | No | No |
| Weight | 62.6 lbs / 28.4 kg | 47.2 lbs / 21.4 kg |
| Bass Extension (-3dB) | - | 53Hz (measured, vendor Spinorama data) |
Related Speaker Comparisons
A few more comparisons worth a look in the same class:
- HK Audio LINEAR 7 115 FA vs RCF NX 945-A
- Martin Audio XP15 vs DAS Audio Vantec 15A
- RCF ART 945-A vs Vue Audiotechnik H-15
- RCF KX 45-A vs Yamaha DXR15mkII
- Yamaha DXR12mkII vs RCF KX 45-A
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 ART 735-A MK4: $888.00 B&H Photo Video Guitar Center eBay
Pros: Its large 3-inch compression-driver voice coil, 132dB claimed peak and roughly 53Hz measured extension give it useful vocal headroom and bass reach. The 21.4kg enclosure remains manageable for a 15-inch box.
Cons: The low-quality vendor data is truncated and does not yield a preference score. It is discontinued and eclipsed by current 9-series and MK5 models.
Full RCF ART 735-A MK4 review and specifications →
| Amplifier Power | 1,400W peak / 700W RMS (1,000W LF + 400W HF peak, manufacturer specified) |
|---|---|
| Bass Extension (-3dB) | 53Hz (measured, vendor Spinorama data) |
| Bluetooth | No |
| Cabinet Material | Polypropylene composite |
| Configuration | Active 2-way bass-reflex PA speaker |
| Coverage | 100° x 60° |
| Crossover Frequency | 800Hz (manufacturer specified) |
| DSP | Yes, FiRPHASE, EQ, limiting and protection |
| Dimensions | 27.9"H x 17.2"W x 15.3"D (708 x 437 x 389 mm) |
| Drivers | 15" woofer, 1.4" compression driver with 3" voice coil |
| Frequency Response | 45Hz - 20kHz (manufacturer specified) |
| Inputs | XLR/jack combo input; XLR output |
| Maximum SPL | 132dB peak (manufacturer specified) |
| Rigging | Two M10 fly points; pole mount |
| Weight | 47.2 lbs / 21.4 kg |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- RCF ART 735-A MK4 vs Martin Audio XP15
- RCF ART 735-A MK4 vs DAS Audio Vantec 15A
- RCF ART 735-A MK4 vs FBT J15A
- RCF ART 735-A MK4 vs Behringer Eurolive B215XL
- RCF ART 735-A MK4 vs RCF ART 715-A MK4
- RCF ART 735-A MK4 vs RCF ART 745-A MK4
- RCF ART 735-A MK4 vs Yamaha DBR15
- RCF ART 735-A MK4 vs RCF ART 745-A MK5
- See all 19 comparisons