Short answer: the ART 945-A, on measured performance and portability. These rank #1 and #5 out of 76 15-inch powered PA speakers, priced at $2,099 and $4,618.50, a $2,519.50 difference.
The ART 945-A is the strongest-measuring 15-inch RCF in this ranking. Medium-quality vendor data produces a 6.69 ideal-subwoofer preference score with roughly 50Hz extension. The top-tier compression driver and 41.4 lbs (18.8 kg) enclosure combine unusually high output with easy portability for a 15-inch box. Pricing and wide retail distribution aren’t yet well established for this model, and the RCF ART9 range above the 912/932-A pair has a shorter market track record, but the measured result is the standout here.
The KX 45-A is RCF’s flagship point source with RDNet, but its measurement is unconfirmed. It 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, but the local measurement is truncated and cannot produce a preference score. At 62.6 lbs (28.4 kg) it’s also nearly 22 lbs (10 kg) heavier than the ART 945-A.
What the KX 45-A adds:
- RDNet remote monitoring and control, unavailable on the ART 945-A.
- A higher claimed peak output, 137dB versus the ART 945-A’s 135dB.
- A wider, rotatable 100° x 70° horn, versus the ART’s fixed 100° x 60°.
- A 3200W amplifier, nearly 50% more than the ART 945-A’s 2100W.
Buy the ART 945-A for the strongest confirmed measured result in RCF’s 15-inch line, plus meaningfully lighter weight.
Buy the KX 45-A if RDNet networked control and the highest available claimed output matter more than a confirmed measurement.
Still deciding? The full PA & Live Sound rankings cover every ranked option.
A 15 inch PA speaker with very high output and good sound, and light for its size.
A flagship powered 15 inch PA speaker with huge amplifier power, very loud peaks, remote control and rotatable coverage.
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Specifications Side By Side
| RCF ART 945-A | RCF KX 45-A | |
|---|---|---|
| Price | $2,099.00 | $4,618.50 |
| Ranked | #1 of 76 in 15-Inch PA Speakers | #5 of 76 in 15-Inch PA Speakers |
| Passive | No | No |
| Configuration | Active 2-way bass-reflex PA speaker | Active 2-way bass-reflex point-source PA speaker |
| Drivers | 15” woofer, 1.4” exit/3” diaphragm compression driver | 15” neodymium woofer, 1.4” exit/3” dome compression driver |
| Frequency Response | 45Hz - 20kHz (manufacturer specified) | 50Hz - 20kHz (manufacturer specified) |
| Dimensions | 28.2”H x 16.3”W x 16.1”D (717 x 415 x 410 mm) | 27.8”H x 16.5”W x 16.9”D (705 x 419.6 x 430 mm) |
| Coverage | 100° x 60° | 100° x 70°, rotatable |
| Maximum SPL | 135dB peak (manufacturer specified) | 137dB peak (manufacturer specified) |
| Inputs | XLR and 1/4-inch jack input; XLR output | XLR audio input/link and EtherCON RDNet |
| Amplifier Power | 2100W peak (1400W LF + 700W HF) | 3200W peak (2000W LF + 1200W HF) |
| Crossover Frequency | 650Hz | 750Hz |
| Cabinet Material | PP composite | Baltic birch plywood |
| Rigging | M10 inserts; 35mm pole mount | Quick-lock rigging; 6 x M10 inserts; 35mm pole mount |
| Bass Extension (-3dB) | 50.5Hz (measured, vendor Spinorama data) | 54.5Hz (measured, manufacturer spinorama data) |
| DSP | Yes, FiRPHASE and Bass Motion Control | Yes, FiRPHASE, Bass Motion Control, presets and RDNet |
| Bluetooth | No | No |
| Weight | 49.4 lbs (22.4 kg) | 62.6 lbs (28.4 kg) |
| Spinorama Preference Score | 4.50 | - |
| Spinorama Preference Score with Perfect Sub | 6.69 | - |
| XLR Input | Yes | Yes |
| RCA Input | No | No |
| TRS Input | Yes | No |
| Optical Input | No | No |
| Coaxial Input | No | No |
| USB Input | No | No |
| HDMI Input | No | No |
| AES Input | No | No |
| Aux Input | No | No |
| Microphone Input | No | No |
| Guitar Input | No | No |
| Network Control | - | RDNet |
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. The two were measured by different sources, so small differences, especially in the bass, can come from the measurement setup rather than the speakers.
Measurement data: RCF ART 945-A (measured by an independent reviewer) and RCF KX 45-A (measured by the manufacturer), via spinorama.org.
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