RCF NX 945-A vs RCF ART 745-A MK4

Short answer: these RCF NX 945-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 945-A. The top NX-series 15-inch box pairs a plywood cabinet with a 135dB claimed peak, the highest in the NX range, and a wide 100° x 70° pattern. RCF’s FiRPHASE and Bass Motion Control processing carry over from the smaller NX models.

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 measurement is truncated and does not produce a preference score, so its tonal position relies on published engineering rather than a confirmed result. At 27.3kg it is heavier than the ART 945-A alternative. 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 945-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

Related Speaker Comparisons

More useful head-to-heads from the same speaker class:

• HK Audio LINEAR 7 115 FA vs Yamaha DZR15
• Vue Audiotechnik A-15 vs LD Systems Stinger 15-A-G3
• RCF KX 45-A vs HK Audio LINEAR 7 115 FA
• RCF NX 945-A vs RCF NX 915-A
• Vue Audiotechnik A-15 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.

As an eBay Partner, we may be compensated if you make a purchase.

The Two Speakers In Full

RCF NX 945-A: $2,299.00 Amazon B&H Photo Video Guitar Center eBay

Pros: The top NX-series 15-inch box pairs a plywood cabinet with a 135dB claimed peak, the highest in the NX range, and a wide 100° x 70° pattern. RCF’s FiRPHASE and Bass Motion Control processing carry over from the smaller NX models.

Cons: The measurement is truncated and does not produce a preference score, so its tonal position relies on published engineering rather than a confirmed result. At 27.3kg it is heavier than the ART 945-A alternative.

Full RCF NX 945-A review and specifications →

Amplifier Power	2100W peak (1400W LF + 700W HF)
Bass Extension (-3dB)	65Hz (measured, vendor Spinorama data)
Bluetooth	No
Cabinet Material	Plywood
Configuration	Active 2-way bass-reflex PA speaker
Coverage	100° x 70°
Crossover Frequency	650Hz
DSP	Yes, FiRPHASE and Bass Motion Control
Dimensions	27.8"H x 16.5"W x 17.8"D (705 x 420 x 451 mm)
Drivers	15" woofer, compression driver
Frequency Response	45Hz - 20kHz (manufacturer specified)
Inputs	XLR/TRS combo input and XLR output
Maximum SPL	135dB peak (manufacturer specified)
Rigging	M10 and quick-lock rigging; 35mm pole mount
Weight	60.2 lbs / 27.3 kg

• Links
  • RCF NX 945-A Product Information
• Reviews, Comparisons and Sound Samples
  • Spinorama Measurements
• Head-to-Head Comparisons
  • RCF NX 945-A vs HK Audio LINEAR 7 115 FA
  • RCF NX 945-A vs KV2 Audio EX15
  • RCF NX 945-A vs RCF KX 45-A
  • RCF NX 945-A vs Yamaha DZR15
  • RCF NX 945-A vs Vue Audiotechnik H-15
  • RCF NX 945-A vs JBL PRX915
  • RCF NX 945-A vs RCF ART 945-A
  • RCF NX 945-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