RCF NX 945-A vs KV2 Audio EX15

Short answer: the RCF NX 945-A for most buyers, the KV2 Audio EX15 for specialists chasing bass extension and vocal clarity. These rank #5 and #6 out of 29 15-inch powered PA speakers, separated by a large $3701 price gap.

The EX15 has the deepest confirmed bass reach in this size class. Medium-quality vendor data gives it a 4.22 ideal-subwoofer preference score with 42Hz measured extension. The NX 945-A’s measurement is truncated and does not produce a preference score, so its tonal position relies on published engineering rather than a confirmed result, though it does claim the highest peak in the NX range at 135dB with a wide 100 degree x 70 degree pattern.

Price and accessibility strongly favor the RCF. At $6000 the NX 945-A is a fraction of the EX15’s roughly $2299 asking price, and its own review notes the EX15 is far less accessible than the mainstream leaders, with comparatively spare user controls and no onboard mixer or app control.

Both carry over familiar processing from smaller siblings: the NX 945-A runs RCF’s FiRPHASE and Bass Motion Control, while the EX15’s integrated DSP handles crossover, phase alignment, EQ and protection through its 3-inch-diaphragm compression driver aimed at vocal clarity and controlled throw.

Buy the RCF NX 945-A for the far lower price, the highest claimed peak output in the NX range, and FiRPHASE/Bass Motion Control processing.

Buy the KV2 Audio EX15 if the deepest confirmed bass extension and vocal-clarity-focused driver justify the much higher cost.

Specifications Side By Side

Related Speaker Comparisons

Other pairings from the same speaker class worth checking:

• Vue Audiotechnik H-15 vs HK Audio LINEAR 7 115 FA
• RCF KX 45-A vs HK Audio LINEAR 7 115 FA
• HK Audio LINEAR 7 115 FA vs Yamaha DZR15
• Vue Audiotechnik H-15 vs RCF NX 945-A
• KV2 Audio EX15 vs Yamaha DZR15

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 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 RCF KX 45-A
  • RCF NX 945-A vs Vue Audiotechnik H-15

KV2 Audio EX15: $6,000.00 eBay

Pros: Medium-quality vendor data gives it a 4.22 ideal-subwoofer preference score with 42Hz measured extension, the deepest bass reach of any 15-inch box in this ranking. Its 3-inch-diaphragm compression driver and integrated DSP target vocal clarity and controlled throw.

Cons: At a roughly $6,000 asking price this specialist box is far less accessible than the mainstream leaders, and user controls are comparatively spare without an onboard mixer or app control.

Full KV2 Audio EX15 review and specifications →

Amplifier Power	1,000W continuous (850W LF + 100W mid + 50W HF, manufacturer specified)
Bass Extension (-3dB)	50Hz (measured, vendor Spinorama data)
Bluetooth	No
Cabinet Material	Baltic birch plywood
Configuration	Active 2-way bass-reflex PA speaker
Crossover Frequency	500Hz / 2.7kHz (manufacturer specified)
DSP	Integrated crossover, phase alignment, EQ and protection
Dimensions	27.6"H x 17.7"W x 17.7"D (700 x 450 x 450 mm)
Drivers	15" neodymium woofer, 1.4" exit/3" diaphragm compression driver
Frequency Response	44Hz - 18kHz (-3dB, manufacturer specified)
Inputs	Balanced female XLR input; male XLR through output

• Links
  • KV2 Audio EX15 Product Information
• Reviews, Comparisons and Sound Samples
  • Spinorama Measurements
• Head-to-Head Comparisons
  • KV2 Audio EX15 vs Yamaha DZR15
  • KV2 Audio EX15 vs JBL PRX915
  • KV2 Audio EX15 vs RCF KX 45-A