Short answer: the FBT J15A. It ranks #46 of 76 15-inch pa speakers by sound quality, rated 3.3/5, at $563; the Martin Audio XP15 ranks #50, rated 3.2/5, and costs $1,950, which makes this an easy call rather than a real tradeoff.
The XP15 measures noticeably better across the board. 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. That’s a stronger result than the J15A’s, and its rotatable 80° x 50° horn adds aiming flexibility the J15A’s fixed horn doesn’t offer. Martin Audio does have a smaller North American dealer network than JBL, Yamaha or QSC, and pricing isn’t yet well established for this model.
The J15A measures lower and extends its wedge-capable design to a 15-inch woofer. Medium-quality vendor data shows a 3.87 ideal-subwoofer preference score with 63Hz measured extension, extending the compact, wedge-capable J-series design used by the J12A and J8A to a 15-inch woofer. The preference score is on the lower end for this ranking, and detailed coverage, SPL and weight figures weren’t confirmed in local data.
Buy the XP15 for the stronger measured preference score, deeper bass extension, and rotatable horn.
Buy the J15A if you specifically need its wedge-capable form factor for stage-monitor duty and the measured gap doesn’t concern you.
Looking for alternatives? See the complete PA & Live Sound rankings.
A compact, budget friendly powered 15 inch PA speaker whose wedge shaped cabinet can also work as a floor monitor.
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
| FBT J15A | Martin Audio XP15 | |
|---|---|---|
| Price | $563 | $1,950 |
| Ranked | #46 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, compression driver | 15” woofer, compression driver |
| Dimensions | 26.1”H x 16.1”W x 15.2”D (663 x 410 x 387 mm) | 27.2”H x 16.8”W x 16”D (690 x 427 x 407 mm) |
| Crossover Frequency | 1.8kHz (manufacturer specified) | 2kHz active (24dB/octave) |
| Frequency Response | 48Hz - 20kHz (manufacturer specified) | 55Hz - 20kHz (±3dB, manufacturer specified); 45Hz (-10dB) |
| Inputs | XLR/jack input with link output | Two female XLR/quarter-inch combo inputs; male XLR mix output |
| Amplifier Power | 450W RMS (350W LF + 100W HF); 900W peak (700W LF + 200W HF) | 1,300W peak (1,000W LF + 300W HF, manufacturer specified) |
| Cabinet Material | Polypropylene | Multi-angle birch/poplar plywood |
| Rigging | Two M10 fly points; pole socket | Thirteen M8 inserts; pole-mount socket |
| Bass Extension (-3dB) | 63Hz (measured, vendor Spinorama data) | 54.5Hz (measured, vendor Spinorama data) |
| DSP | Yes | Yes |
| Bluetooth | No | No |
| Spinorama Preference Score | 1.16 | 2.44 |
| Spinorama Preference Score with Perfect Sub | 3.87 | 4.71 |
| 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 |
| Maximum SPL | 129dB (manufacturer specified) | 131dB peak / 125dB continuous |
| Coverage | 90° x 60° | 80° x 50°, rotatable |
| Weight | 33.3 lbs (15.12 kg) | 57.3 lbs (26 kg) |
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: FBT J15A (measured by the manufacturer) and Martin Audio XP15 (measured by the manufacturer), via spinorama.org.
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