Short answer: choose between the RCF KX 45-A and Yamaha DXR15mkII for the requirements of the venue and system, not from rank alone. In this size class, coverage, bass extension, output capability, DSP, cabinet construction, and service support often decide the better fit. The Yamaha DXR15mkII is discontinued; its replacement is the Yamaha DXR15mkIII.
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 Yamaha DXR15mkII. A proven, broadly distributed workhorse: medium-quality vendor data shows a 4.98 ideal-subwoofer preference score with 61Hz measured extension, and Yamaha’s FIR-X processing and D-CONTOUR presets simplify setup.
What to weigh before buying. The local measurement is truncated and cannot produce a preference score. At 62.6 lbs (28.4 kg) it is one of the heaviest boxes here, and pricing/retail availability are not yet established. The preference score sits mid-pack for this ranking, and it lacks app control or Bluetooth audio found on some newer competitors.
Buy the RCF KX 45-A when its stated coverage, output, processing, and deployment format best match the job.
Buy the Yamaha DXR15mkII when its stated strengths are the better match for the room and the rest of the PA.
Want more options? Browse the full PA & Live Sound rankings.
A flagship powered 15 inch PA speaker with huge amplifier power, very loud peaks, remote control and rotatable coverage.
A proven, widely available powered 15 inch PA speaker with presets that make setup simple.
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Specifications Side By Side
| RCF KX 45-A | Yamaha DXR15mkII | |
|---|---|---|
| Price | $4,618.50 | $798.00 Discontinued |
| Ranked | #5 of 76 in 15-Inch PA Speakers | #26 of 76 in 15-Inch PA Speakers |
| Passive | No | No |
| Configuration | Active 2-way bass-reflex point-source PA speaker | Active 2-way bass-reflex PA speaker |
| Drivers | 15” neodymium woofer, 1.4” exit/3” dome compression driver | 15” woofer, 1.75” compression driver |
| Frequency Response | 50Hz - 20kHz (manufacturer specified) | 49Hz - 20kHz (-10dB, manufacturer specified) |
| Dimensions | 27.8”H x 16.5”W x 16.9”D (705 x 419.6 x 430 mm) | 27.6”H x 17.5”W x 15”D (700 x 445 x 380 mm) |
| Coverage | 100° x 70°, rotatable | 90° x 60° (constant directivity horn) |
| Maximum SPL | 137dB peak (manufacturer specified) | 134dB peak (manufacturer specified) |
| Inputs | XLR audio input/link and EtherCON RDNet | XLR, dual 1/4-inch, stereo RCA; XLR thru and link outputs |
| Amplifier Power | 3200W peak (2000W LF + 1200W HF) | 1100W dynamic / 700W continuous (950W LF + 150W HF dynamic) |
| Crossover Frequency | 750Hz | - |
| Cabinet Material | Baltic birch plywood | Matte-finish ABS |
| Rigging | Quick-lock rigging; 6 x M10 inserts; 35mm pole mount | 3 x M10 points; 35mm dual-angle pole mount |
| Network Control | RDNet | - |
| DSP | Yes, FiRPHASE, Bass Motion Control, presets and RDNet | Yes |
| Bluetooth | No | No |
| Weight | 62.6 lbs (28.4 kg) | 48.1 lbs (21.8 kg) |
| XLR Input | Yes | Yes |
| RCA Input | No | Yes |
| TRS Input | No | Yes |
| 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 |
| Bass Extension (-3dB) | 54.5Hz (measured, manufacturer spinorama data) | 67Hz (measured, vendor Spinorama data) |
| Spinorama Preference Score | - | 2.28 |
| Spinorama Preference Score with Perfect Sub | - | 4.98 |
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.
Measurement data: RCF KX 45-A (measured by the manufacturer) and Yamaha DXR15mkII (measured by the manufacturer), via spinorama.org.
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