Short answer: choose between the FBT J15A and RCF ART 735-A MK4 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 case for the FBT J15A. Medium-quality vendor data shows a 3.25 ideal-subwoofer preference score with 61Hz measured extension, extending the compact, wedge-capable J-series design used by the J12A and J8A to a 15-inch woofer.
The case for the RCF ART 735-A MK4. Its large 3-inch compression-driver voice coil, 132dB claimed peak and roughly 53Hz measured extension give it useful vocal headroom and bass reach. The 21.4kg enclosure remains manageable for a 15-inch box.
Important trade-offs. The preference score is on the lower end for this ranking, and detailed coverage, SPL and weight figures were not confirmed in local data. The low-quality vendor data is truncated and does not yield a preference score. It is discontinued and eclipsed by current 9-series and MK5 models.
Buy the FBT J15A when its stated format, coverage, and system features fit the job better.
Buy the RCF ART 735-A MK4 when its stated output, control, and deployment strengths better match the system.
If sound quality matters at all to you, skip both of these and look higher up the 29 15-inch two-way powered pa speakers instead.
Specifications Side By Side
| FBT J15A | RCF ART 735-A MK4 | |
|---|---|---|
| Price | $1,060.00 | $888.00 |
| Ranked | #22 of 29 in 15-Inch Two-Way Powered PA Speakers | #24 of 29 in 15-Inch Two-Way Powered PA Speakers |
| Configuration | Active 2-way bass-reflex PA speaker | Active 2-way bass-reflex PA speaker |
| Drivers | 15" woofer, compression driver | 15" woofer, 1.4" compression driver with 3" voice coil |
| Dimensions | 26.1"H x 16.1"W x 15.2"D (663 x 410 x 387 mm) | 27.9"H x 17.2"W x 15.3"D (708 x 437 x 389 mm) |
| Crossover Frequency | 1.8kHz (manufacturer specified) | 800Hz (manufacturer specified) |
| Frequency Response | 48Hz - 20kHz (manufacturer specified) | 45Hz - 20kHz (manufacturer specified) |
| Inputs | XLR/jack input with link output | XLR/jack combo input; XLR output |
| Amplifier Power | 450W RMS (350W LF + 100W HF); 900W peak (700W LF + 200W HF) | 1,400W peak / 700W RMS (1,000W LF + 400W HF peak, manufacturer specified) |
| Cabinet Material | Polypropylene | Polypropylene composite |
| Rigging | Two M10 fly points; pole socket | Two M10 fly points; pole mount |
| Bass Extension (-3dB) | 63Hz (measured, vendor Spinorama data) | 53Hz (measured, vendor Spinorama data) |
| DSP | Yes | Yes, FiRPHASE, EQ, limiting and protection |
| Bluetooth | No | No |
| Coverage | - | 100° x 60° |
| Maximum SPL | - | 132dB peak (manufacturer specified) |
| Weight | - | 47.2 lbs / 21.4 kg |
Related Speaker Comparisons
Other pairings from the same speaker class worth checking:
- DAS Audio Vantec 15A vs Behringer Eurolive B215XL
- DAS Audio Vantec 15A vs RCF ART 715-A MK4
- LD Systems Stinger 15-A-G3 vs RCF ART 745-A MK4
- LD Systems Stinger 15-A-G3 vs FBT J15A
- FBT J15A vs Martin Audio XP15
Prices on this page were last checked September 7, 2026 at 7:47 AM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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The Two Speakers In Full
FBT J15A: $1,060.00 B&H Photo Video eBay
Pros: Medium-quality vendor data shows a 3.25 ideal-subwoofer preference score with 61Hz measured extension, extending the compact, wedge-capable J-series design used by the J12A and J8A to a 15-inch woofer.
Cons: The preference score is on the lower end for this ranking, and detailed coverage, SPL and weight figures were not confirmed in local data.
Full FBT J15A review and specifications →
| Amplifier Power | 450W RMS (350W LF + 100W HF); 900W peak (700W LF + 200W HF) |
|---|---|
| Bass Extension (-3dB) | 63Hz (measured, vendor Spinorama data) |
| Bluetooth | No |
| Cabinet Material | Polypropylene |
| Configuration | Active 2-way bass-reflex PA speaker |
| Crossover Frequency | 1.8kHz (manufacturer specified) |
| DSP | Yes |
| Dimensions | 26.1"H x 16.1"W x 15.2"D (663 x 410 x 387 mm) |
| Drivers | 15" woofer, compression driver |
| Frequency Response | 48Hz - 20kHz (manufacturer specified) |
| Inputs | XLR/jack input with link output |
| Rigging | Two M10 fly points; pole socket |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
RCF ART 735-A MK4: $888.00 B&H Photo Video Guitar Center eBay
Pros: Its large 3-inch compression-driver voice coil, 132dB claimed peak and roughly 53Hz measured extension give it useful vocal headroom and bass reach. The 21.4kg enclosure remains manageable for a 15-inch box.
Cons: The low-quality vendor data is truncated and does not yield a preference score. It is discontinued and eclipsed by current 9-series and MK5 models.
Full RCF ART 735-A MK4 review and specifications →
| Amplifier Power | 1,400W peak / 700W RMS (1,000W LF + 400W HF peak, manufacturer specified) |
|---|---|
| Bass Extension (-3dB) | 53Hz (measured, vendor Spinorama data) |
| Bluetooth | No |
| Cabinet Material | Polypropylene composite |
| Configuration | Active 2-way bass-reflex PA speaker |
| Coverage | 100° x 60° |
| Crossover Frequency | 800Hz (manufacturer specified) |
| DSP | Yes, FiRPHASE, EQ, limiting and protection |
| Dimensions | 27.9"H x 17.2"W x 15.3"D (708 x 437 x 389 mm) |
| Drivers | 15" woofer, 1.4" compression driver with 3" voice coil |
| Frequency Response | 45Hz - 20kHz (manufacturer specified) |
| Inputs | XLR/jack combo input; XLR output |
| Maximum SPL | 132dB peak (manufacturer specified) |
| Rigging | Two M10 fly points; pole mount |
| Weight | 47.2 lbs / 21.4 kg |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons