Short answer: the RCF ART 935-A. Both are rated 3.9/5 for sound quality (#17 and #14 of 76 15-inch pa speakers), and the RCF ART 935-A costs $1,499 against $1,775 for the FBT Promaxx 114A, and with sound quality even, the cheaper one is the better buy.
The case for the FBT Promaxx 114A: A light powered PA speaker with good sound, loud peaks and three built in monitor angles for floor use. 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.
The RCF ART 935-A is the deeper-bass choice. A powered 15 inch PA speaker with good sound, wide coverage and loud peaks, still manageable to carry for its size. Its bass reaches about 54.5Hz before falling 3dB, against 88Hz for the FBT Promaxx 114A. The catch: 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 RCF ART 935-A. Both are rated the same for sound quality, and it costs $276 less than the FBT Promaxx 114A.
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Prices on this page were last checked November 7, 2026 at 7:34 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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Specifications Side By Side
| FBT Promaxx 114A | RCF ART 935-A | |
|---|---|---|
| Price | $1,775.00 | $1,499.00 |
| Ranked | #14 of 76 in 15-Inch PA Speakers | #17 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 | 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 |
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