Short answer: choose between the RCF KX 45-A and Yamaha DBR15 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.
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 DBR15. Yamaha’s most portable 15-inch powered speaker carries the same DSP and amplification platform as the DXR and DZR series, with a built-in 2-channel mixer accepting XLR, 1/4-inch, RCA and 3.5mm sources.
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. Medium-quality vendor data shows a 2.87 ideal-subwoofer preference score, one of the weaker results in this ranking and well below the DBR12’s own measured result, so a subwoofer partner matters more here than with most alternatives.
Buy the RCF KX 45-A when its stated coverage, output, processing, and deployment format best match the job.
Buy the Yamaha DBR15 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 light, affordable 15 inch powered PA speaker with a built in two channel mixer for mics, instruments and line sources.
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Specifications Side By Side
| RCF KX 45-A | Yamaha DBR15 | |
|---|---|---|
| Price | $4,618.50 | $559.99 |
| Ranked | #5 of 76 in 15-Inch PA Speakers | #65 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, 1.4” compression driver |
| Frequency Response | 50Hz - 20kHz (manufacturer specified) | 50Hz - 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 17.9”W x 14.9”D (700 x 455 x 378 mm) |
| Coverage | 100° x 70°, rotatable | 90° x 60° (constant directivity horn) |
| Maximum SPL | 137dB peak (manufacturer specified) | 132dB peak (manufacturer specified) |
| Inputs | XLR audio input/link and EtherCON RDNet | 2 x XLR/TRS combo and stereo RCA; XLR output |
| Amplifier Power | 3200W peak (2000W LF + 1200W HF) | 1000W dynamic / 465W continuous (800W LF + 200W HF dynamic) |
| Crossover Frequency | 750Hz | - |
| Cabinet Material | Baltic birch plywood | Plastic |
| Rigging | Quick-lock rigging; 6 x M10 inserts; 35mm pole mount | 3 x M8 points; 35mm 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) | 42.5 lbs (19.3 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) | 53Hz (measured, vendor Spinorama data) |
| Spinorama Preference Score | - | 0.49 |
| Spinorama Preference Score with Perfect Sub | - | 2.87 |
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 DBR15 (measured by the manufacturer), via spinorama.org.
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