RCF KX 45-A vs RCF ART 745-A MK4

Short answer: these RCF KX 45-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 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 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 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 is eclipsed by the better-supported ART 745-A MK5.

Buy the RCF KX 45-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

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• Vue Audiotechnik H-15 vs RCF NX 945-A
• RCF KX 45-A vs RCF NX 915-A
• RCF KX 45-A vs RCF ART 935-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
  • RCF KX 45-A Product Information
• Reviews, Comparisons and Sound Samples
  • Spinorama Measurements
• Head-to-Head Comparisons
  • RCF KX 45-A vs Vue Audiotechnik H-15
  • RCF KX 45-A vs HK Audio LINEAR 7 115 FA
  • RCF KX 45-A vs RCF ART 945-A
  • RCF KX 45-A vs RCF NX 945-A
  • RCF KX 45-A vs KV2 Audio EX15
  • RCF KX 45-A vs Yamaha DZR15
  • RCF KX 45-A vs JBL PRX915
  • RCF KX 45-A vs RCF ART 935-A
  • See all 19 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
  • RCF ART 745-A MK4 Product Information
• Reviews, Comparisons and Sound Samples
  • Spinorama Measurements
• 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 NX 915-A
  • RCF ART 745-A MK4 vs RCF ART 715-A MK5
  • See all 19 comparisons