Short answer: choose between the RCF ART 745-A MK4 and Martin Audio XP15 for the deployment, not from the automatic ranking alone. Their driver format, power requirements, coverage, bass reach, output capability, and control features determine which is the more practical PA for a particular room or system. The RCF ART 745-A MK4 is discontinued; its replacement is the RCF ART 745-A MK5. If you are buying new, get the RCF ART 745-A MK5.
The case for the RCF ART 745-A MK4. The largest ART7 compression driver, 133dB claimed peak and a light 41.4 lbs (18.8 kg) enclosure give this discontinued flagship useful vocal headroom for a 15-inch box.
The case for the Martin Audio XP15. Medium-quality vendor data returns a 4.71 ideal-subwoofer preference score with 48Hz measured extension, extending the XP12’s rotatable horn and Class-D amplification to a 15-inch cabinet.
Important trade-offs. The low-quality vendor data is truncated and does not yield a preference score. It is discontinued and is eclipsed by the better-supported ART 745-A MK5. Martin Audio has a smaller North American dealer network than JBL, Yamaha or QSC, and pricing is not yet well established for this model.
Buy the RCF ART 745-A MK4 when its stated format, coverage, and system features fit the job better.
Buy the Martin Audio XP15 when its stated output, control, and deployment strengths better match the system.
Want more options? Browse the full PA & Live Sound rankings.
A discontinued 15 inch powered PA speaker with a large compression driver for strong vocal headroom in a fairly light cabinet.
A powered 15 inch PA speaker with a rotatable horn, two combo inputs and fairly deep bass for gigs and events.
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Specifications Side By Side
| RCF ART 745-A MK4 | Martin Audio XP15 | |
|---|---|---|
| Price | $1,699.00 Discontinued | $1,950 |
| Ranked | #44 of 76 in 15-Inch PA Speakers | #50 of 76 in 15-Inch PA Speakers |
| Passive | No | No |
| Configuration | Active 2-way bass-reflex PA speaker | Active 2-way bass-reflex PA speaker |
| Drivers | 15” woofer, 1.4” exit/3” diaphragm compression driver | 15” woofer, compression driver |
| Frequency Response | 45Hz - 20kHz (manufacturer specified) | 55Hz - 20kHz (±3dB, manufacturer specified); 45Hz (-10dB) |
| Dimensions | 27.9”H x 17.4”W x 15.2”D (708 x 442 x 387 mm) | 27.2”H x 16.8”W x 16”D (690 x 427 x 407 mm) |
| Inputs | XLR/jack combo input; XLR output | Two female XLR/quarter-inch combo inputs; male XLR mix output |
| Amplifier Power | 1,400W peak / 700W RMS (1,000W LF + 400W HF peak, manufacturer specified) | 1,300W peak (1,000W LF + 300W HF, manufacturer specified) |
| Crossover Frequency | 650Hz (manufacturer specified) | 2kHz active (24dB/octave) |
| Cabinet Material | Polypropylene composite | Multi-angle birch/poplar plywood |
| Rigging | M10 fly points; pole mount | Thirteen M8 inserts; pole-mount socket |
| Coverage | 100° x 60° | 80° x 50°, rotatable |
| Maximum SPL | 133dB peak (manufacturer specified) | 131dB peak / 125dB continuous |
| Bass Extension (-3dB) | 65Hz (measured, vendor Spinorama data) | 54.5Hz (measured, vendor Spinorama data) |
| DSP | Yes, FiRPHASE, EQ, limiting and protection | Yes |
| Bluetooth | No | No |
| Weight | 41.4 lbs (18.8 kg) | 57.3 lbs (26 kg) |
| XLR Input | Yes | Yes |
| RCA Input | No | No |
| TRS Input | Yes | 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 |
| Spinorama Preference Score | - | 2.44 |
| Spinorama Preference Score with Perfect Sub | - | 4.71 |
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 ART 745-A MK4 (measured by the manufacturer) and Martin Audio XP15 (measured by the manufacturer), via spinorama.org.
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