Short answer: a tie on sound quality. Both are rated 3.9/5 (#9 and #10 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. The tradeoff: 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 JBL PRX915: High-quality vendor data shows a 4.77 ideal-subwoofer preference score with 51Hz measured extension, backed by JBL’s extensive service network and 12-band parametric EQ with dbx DriveRack feedback suppression carried over from the JBL PRX912. The tradeoff: Its measured preference trails the 12-inch JBL PRX912, and at 24.1kg it is meaningfully heavier to carry to a gig than the smaller model.
Buy the FBT Promaxx 114A or the JBL PRX915 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 | JBL PRX915 | |
|---|---|---|
| Price | - | $1,099.00 |
| Ranked | #9 of 38 in 15-Inch PA Speakers | #10 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, 1.5” compression driver |
| Frequency Response | 45Hz - 20kHz (manufacturer specified) | 48Hz - 19kHz (-10dB, manufacturer specified) |
| Amplifier Power | 700W RMS Class D (LF) plus 200W RMS Class H/AB (HF) | 2000W peak / 1000W RMS |
| Maximum SPL | 135.5dB peak (manufacturer specified) | 133dB peak (manufacturer specified) |
| Coverage | 90° x 60° | 90° x 50° |
| DSP | Yes | Yes, 12-band parametric EQ and dbx DriveRack |
| Cabinet Material | Polypropylene | Polypropylene/talc composite |
| Rigging | Three built-in monitor angles (12°, 40°, 55°) | 6 x M10 suspension points; dual 36mm pole sockets |
| Weight | 41.4 lbs (18.8 kg) | 53.1 lbs (24.1 kg) |
| Bass Extension (-3dB) | 88Hz (measured, vendor Spinorama data) | 58Hz (measured, vendor Spinorama data) |
| Bluetooth | No | Yes, control via JBL Pro Connect app |
| Spinorama Preference Score | 4.09 | 2.40 |
| Spinorama Preference Score with Perfect Sub | 7.12 | 4.77 |
| 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 | Yes |
| Microphone Input | No | No |
| Guitar Input | No | No |
| Dimensions | - | 28.2”H x 18.3”W x 15.1”D (717 x 465 x 383 mm) |
| Inputs | - | 2 x XLR/TRS combo, 3.5mm aux; 2 x XLR thru and XLR mix outputs |
| Crossover Frequency | - | 1920Hz |
Related Speaker Comparisons
How FBT Promaxx 114A compares with other leading options:
- KV2 Audio EX15 vs FBT Promaxx 114A
- FBT Promaxx 114A vs RCF ART 935-A
- JBL PRX915 vs Yamaha DXR15mkIII
- JBL PRX915 vs RCF ART 745-A MK5
- JBL PRX915 vs RCF ART 735-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
JBL PRX915: $1,099.00 Amazon B&H Photo Video Guitar Center eBay
Pros: High-quality vendor data shows a 4.77 ideal-subwoofer preference score with 51Hz measured extension, backed by JBL’s extensive service network and 12-band parametric EQ with dbx DriveRack feedback suppression carried over from the JBL PRX912. Measured bass extension of 58Hz (-3dB).
Cons: Its measured preference trails the 12-inch JBL PRX912, and at 24.1kg it is meaningfully heavier to carry to a gig than the smaller model.
Full JBL PRX915 review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 2000W peak / 1000W RMS |
| Aux Input | Yes |
| Bass Extension (-3dB) | 58Hz (measured, vendor Spinorama data) |
| Bluetooth | Yes, control via JBL Pro Connect app |
| Cabinet Material | Polypropylene/talc composite |
| Coaxial Input | No |
| Configuration | Active 2-way bass-reflex PA speaker |
| Coverage | 90° x 50° |
| Crossover Frequency | 1920Hz |
| DSP | Yes, 12-band parametric EQ and dbx DriveRack |
| Dimensions | 28.2”H x 18.3”W x 15.1”D (717 x 465 x 383 mm) |
| Drivers | 15” woofer, 1.5” compression driver |
| Frequency Response | 48Hz - 19kHz (-10dB, manufacturer specified) |
| Guitar Input | No |
| HDMI Input | No |
| Inputs | 2 x XLR/TRS combo, 3.5mm aux; 2 x XLR thru and XLR mix outputs |
| Maximum SPL | 133dB peak (manufacturer specified) |
| Microphone Input | No |
| Optical Input | No |
| RCA Input | No |
| Rigging | 6 x M10 suspension points; dual 36mm pole sockets |
| Spinorama Preference Score | 2.40 |
| Spinorama Preference Score with Perfect Sub | 4.77 |
| TRS Input | Yes |
| USB Input | No |
| Weight | 53.1 lbs (24.1 kg) |
| XLR Input | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons