The FBT J15A is rated 3.3/5 for sound quality, #46 of 76 15-Inch PA Speakers. See all PA & Live Sound rankings for every top pick.
Prices on this page were last checked October 24, 2026 at 4:42 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.
As an eBay Partner, we may be compensated if you make a purchase.
Brand: FBT
#46 FBT J15A: $563 Thomann $563 eBay
Same family: the FBT J5A (smaller model, rated 2.9/5).
Pros: A compact, budget friendly powered 15 inch PA speaker whose wedge shaped cabinet can also work as a floor monitor. Medium-quality vendor data shows a 3.87 ideal-subwoofer preference score with 61Hz measured extension, extending the compact, wedge-capable J-series design used by the FBT J12A and FBT J8A to a 15-inch woofer. Measured bass extension of 63Hz (-3dB).
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.
| Released | 2013 (13 years ago) |
|---|---|
| AES Input | No |
| Amplifier Power | 450W RMS (350W LF + 100W HF); 900W peak (700W LF + 200W HF) |
| Aux Input | No |
| Bass Extension (-3dB) | 63Hz (measured, vendor Spinorama data) |
| Bluetooth | No |
| Cabinet Material | Polypropylene |
| Coaxial Input | No |
| Configuration | Active 2-way bass-reflex PA speaker |
| Coverage | 90° x 60° |
| 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) |
| Guitar Input | No |
| HDMI Input | No |
| Inputs | XLR/jack input with link output |
| Maximum SPL | 129dB (manufacturer specified) |
| Microphone Input | No |
| Optical Input | No |
| Passive | No |
| RCA Input | No |
| Rigging | Two M10 fly points; pole socket |
| Spinorama Preference Score | 1.16 |
| Spinorama Preference Score with Perfect Sub | 3.87 |
| TRS Input | Yes |
| USB Input | No |
| Weight | 33.3 lbs (15.12 kg) |
| XLR Input | Yes |
- Links
- Reviews, Comparisons and Sound Samples
Frequency Response
How the FBT J15A measures across the audible range. A flatter listening window (the sound arriving straight at you) is more neutral: peaks sound forward or harsh, dips sound recessed. The estimated in-room response adds what a typical room does, and there a gentle, even tilt down toward the treble is ideal. Both curves are shifted so their 300 Hz to 3 kHz average sits at 0 dB.
Measurement data: spinorama.org, measured by the manufacturer.
EQ for a Neutral Response
Flattens the measured listening window from the FBT J15A's own bass extension up to 16 kHz. Set a preamp of -1.7 dB, then add these filters to any parametric equalizer in the signal path: the speaker's app or DSP if it has parametric EQ, a miniDSP, Equalizer APO or Wavelet. Boosts are kept to 3 dB, and EQ cannot fix how evenly the speaker spreads sound off-axis, which is why some speakers gain more than others. Predicted preference score with this EQ: -1.2, up from 1.2 (4.2 with an ideal subwoofer, up from 3.9). Calculated by Speaker Ranking from the spinorama measurements above.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| High shelf | 8,000 Hz | -1.1 dB | 0.70 |
| Peak | 159 Hz | -2.5 dB | 0.59 |
| Peak | 1,527 Hz | +1.7 dB | 1.69 |
| Peak | 10,828 Hz | -3.5 dB | 3.86 |
| Peak | 14,868 Hz | -2.1 dB | 4.00 |