Short answer: a tie on sound quality. Both are rated 3.9/5 (#9 and #12 of 38 15-inch pa speakers), so choose on features and fit.
The case for the FBT Promaxx 114A: Vendor Spinorama data gives preference scores of 4.09 standalone and 7.12 with an ideal subwoofer. Watch for: Measured bass reaches only about 88Hz (-3dB) with a 73Hz ideal-subwoofer extension point, so it does not go as deep as the woofer size suggests.
Why pick the RCF ART 935-A: The bigger-voice-coil compression driver, 133dB claimed peak and broad 100° x 60° coverage mirror the well-regarded ART 932-A’s design in a 15-inch cabinet. The tradeoff: The low-quality vendor measurement is truncated and cannot generate a preference score, so its tonal position relies on published engineering and its 12-inch sibling’s reputation rather than a confirmed result.
Buy the FBT Promaxx 114A or the RCF ART 935-A on features: they are rated the same for sound quality at close to the same price.
Want more options? Browse the full PA & Live Sound rankings.
Specifications Side By Side
| FBT Promaxx 114A | RCF ART 935-A | |
|---|---|---|
| Price | - | $1,499.00 |
| Ranked | #9 of 38 in 15-Inch PA Speakers | #12 of 38 in 15-Inch PA Speakers |
| Configuration | Active 2-way bass-reflex PA speaker | Active 2-way bass-reflex PA speaker |
| Drivers | 14” neodymium woofer with 3” voice coil, 1.4” compression driver | 15” woofer, 1.4” exit/3” diaphragm compression driver |
| Frequency Response | 45Hz - 20kHz (manufacturer specified) | 45Hz - 20kHz (manufacturer specified) |
| Amplifier Power | 700W RMS Class D (LF) plus 200W RMS Class H/AB (HF) | 2100W peak (1400W LF + 700W HF) |
| Maximum SPL | 135.5dB peak (manufacturer specified) | 133dB peak (manufacturer specified) |
| Coverage | 90° x 60° | 100° x 60° |
| DSP | Yes | Yes, FiRPHASE and Bass Motion Control |
| Cabinet Material | Polypropylene | PP composite |
| Rigging | Three built-in monitor angles (12°, 40°, 55°) | M10 inserts; 35mm pole mount |
| Weight | 41.4 lbs (18.8 kg) | 54.2 lbs (24.6 kg) |
| Bass Extension (-3dB) | 88Hz (measured, vendor Spinorama data) | 54.5Hz (measured, vendor Spinorama data) |
| Bluetooth | No | No |
| Spinorama Preference Score | 4.09 | - |
| Spinorama Preference Score with Perfect Sub | 7.12 | - |
| XLR Input | Yes | Yes |
| RCA Input | No | No |
| 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 |
| Dimensions | - | 28.2”H x 16.3”W x 16.1”D (717 x 415 x 410 mm) |
| Inputs | - | XLR and 1/4-inch jack input; XLR output |
| Crossover Frequency | - | 800Hz |
Related Speaker Comparisons
More top alternatives to FBT Promaxx 114A:
- KV2 Audio EX15 vs FBT Promaxx 114A
- FBT Promaxx 114A vs JBL PRX915
- Yamaha DZR15 vs RCF ART 935-A
- RCF ART 935-A vs RCF NX 915-A
- RCF ART 935-A vs RCF ART 745-A MK4
Prices on this page were last checked September 26, 2026 at 11:14 PM 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 Promaxx 114A Full Compass eBay
Pros: Vendor Spinorama data gives preference scores of 4.09 standalone and 7.12 with an ideal subwoofer. The 14-inch woofer and 700W amplifier claim 135.5dB peak output from an 18.8kg polypropylene cabinet, and three built-in monitor angles cover floor use. Measured bass extension of 88Hz (-3dB).
Cons: Measured bass reaches only about 88Hz (-3dB) with a 73Hz ideal-subwoofer extension point, so it does not go as deep as the woofer size suggests. Listening-window narrow-band deviation is 0.393, less even than the best boxes in this ranking, and the non-standard 14-inch size means fewer matching accessories.
Full FBT Promaxx 114A review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 700W RMS Class D (LF) plus 200W RMS Class H/AB (HF) |
| Aux Input | No |
| Bass Extension (-3dB) | 88Hz (measured, vendor Spinorama data) |
| Bluetooth | No |
| Cabinet Material | Polypropylene |
| Coaxial Input | No |
| Configuration | Active 2-way bass-reflex PA speaker |
| Coverage | 90° x 60° |
| DSP | Yes |
| Drivers | 14” neodymium woofer with 3” voice coil, 1.4” compression driver |
| Frequency Response | 45Hz - 20kHz (manufacturer specified) |
| Guitar Input | No |
| HDMI Input | No |
| Maximum SPL | 135.5dB peak (manufacturer specified) |
| Microphone Input | No |
| Optical Input | No |
| RCA Input | No |
| Rigging | Three built-in monitor angles (12°, 40°, 55°) |
| Spinorama Preference Score | 4.09 |
| Spinorama Preference Score with Perfect Sub | 7.12 |
| TRS Input | No |
| USB Input | No |
| Weight | 41.4 lbs (18.8 kg) |
| XLR Input | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
RCF ART 935-A: $1,499.00 Amazon B&H Photo Video Guitar Center eBay
Pros: The bigger-voice-coil compression driver, 133dB claimed peak and broad 100° x 60° coverage mirror the well-regarded ART 932-A’s design in a 15-inch cabinet. At 24.2kg it stays manageable for a box this size. Measured bass extension of 54.5Hz (-3dB).
Cons: The low-quality vendor measurement is truncated and cannot generate a preference score, so its tonal position relies on published engineering and its 12-inch sibling’s reputation rather than a confirmed result.
Full RCF ART 935-A review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 2100W peak (1400W LF + 700W HF) |
| Aux Input | No |
| Bass Extension (-3dB) | 54.5Hz (measured, vendor Spinorama data) |
| Bluetooth | No |
| Cabinet Material | PP composite |
| Coaxial Input | No |
| Configuration | Active 2-way bass-reflex PA speaker |
| Coverage | 100° x 60° |
| Crossover Frequency | 800Hz |
| DSP | Yes, FiRPHASE and Bass Motion Control |
| Dimensions | 28.2”H x 16.3”W x 16.1”D (717 x 415 x 410 mm) |
| Drivers | 15” woofer, 1.4” exit/3” diaphragm compression driver |
| Frequency Response | 45Hz - 20kHz (manufacturer specified) |
| Guitar Input | No |
| HDMI Input | No |
| Inputs | XLR and 1/4-inch jack input; XLR output |
| Maximum SPL | 133dB peak (manufacturer specified) |
| Microphone Input | No |
| Optical Input | No |
| RCA Input | No |
| Rigging | M10 inserts; 35mm pole mount |
| TRS Input | Yes |
| USB Input | No |
| Weight | 54.2 lbs (24.6 kg) |
| XLR Input | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons