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 #8 and #11 out of 76 15-inch powered PA speakers, separated by a large $3,701 price gap.

The EX15 has the deepest confirmed bass reach in this size class. Medium-quality vendor data gives it a 4.83 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 $6,000 the NX 945-A is a fraction of the EX15’s roughly $2,299 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.

Want more options? Browse the full PA & Live Sound rankings.

Prices on this page were last checked October 23, 2026 at 8:27 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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Specifications Side By Side

Frequency Response Compared

Both speakers’ spinorama measurements, overlaid. A flatter line is more neutral: peaks sound forward or harsh, dips sound recessed. Each curve is shifted so its average from 300 Hz to 3 kHz sits at 0 dB, so loudness differences between the two are removed and only the shape is compared.

RCF NX 945-AKV2 Audio EX15

RCF NX 945-AKV2 Audio EX15

Measurement data: RCF NX 945-A (measured by the manufacturer) and KV2 Audio EX15 (measured by the manufacturer), via spinorama.org.

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