Short answer: the LINEAR 7 115 FA for confirmed measured performance, the NX 945-A for raw claimed output. These rank #7 and #8 of 76 15-inch powered PA speakers, priced $300 apart.
The LINEAR 7 115 FA has an actual, high-quality measured result. Its vendor data returns a 6.03 ideal-subwoofer preference score with 60Hz measured extension, backed by MILAN/AVB networking, a 10-band parametric EQ and a rotatable constant-directivity horn for professional deployment. The NX 945-A’s measurement is truncated and does not produce a preference score, so its tonal position relies on published engineering rather than a confirmed result, even though it claims the higher 135dB peak, the top of RCF’s NX range, from a wider 100° x 70° pattern against the LINEAR 7’s narrower 60° x 40°.
Weight favors the RCF slightly: 60.2 lbs (27.3 kg) against the LINEAR 7’s 70.5 lbs (32 kg), and the LINEAR 7’s own cons note it is a heavy cabinet for a 15-inch box whose networking is only worth the premium if you actually use it. Both use FIR-style processing, the LINEAR 7 through DSP CONTROL software and the NX 945-A through RCF’s FiRPHASE and Bass Motion Control, and neither has Bluetooth.
Buy the LINEAR 7 115 FA if you want a confirmed preference score and are building a networked system.
Buy the NX 945-A if you want the wider coverage pattern and the higher claimed SPL and are comfortable buying without a computed preference score.
Want more options? Browse the full PA & Live Sound rankings.
A powered 15 inch PA speaker with good sound, network audio, detailed EQ and a rotatable horn for professional systems.
A loud powered 15 inch PA speaker in a plywood cabinet with wide coverage and onboard processing that keeps bass tidy.
Prices on this page were last checked October 23, 2026 at 8:27 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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Specifications Side By Side
| HK Audio LINEAR 7 115 FA | RCF NX 945-A | |
|---|---|---|
| Price | $1,999.00 | $2,299.00 |
| Ranked | #7 of 76 in 15-Inch PA Speakers | #8 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 | 15” woofer, 1” compression driver | 15” woofer, compression driver |
| Frequency Response | 57Hz - 19kHz (±3dB, manufacturer specified); 54Hz - 20kHz (-10dB) | 45Hz - 20kHz (manufacturer specified) |
| Dimensions | 28”H x 17.7”W x 17.7”D (710 x 450 x 450 mm) | 27.8”H x 16.5”W x 17.8”D (705 x 420 x 451 mm) |
| Inputs | XLR/jack combo input, XLR thru and XLR DSP output | XLR/TRS combo input and XLR output |
| Amplifier Power | 2,000W peak (Class D bi-amped, manufacturer specified) | 2100W peak (1400W LF + 700W HF) |
| Crossover Frequency | 1.5kHz FIR (manufacturer specified) | 650Hz |
| Cabinet Material | Hybrid birch multiplex/MDF | Plywood |
| Rigging | Four M8 points; DuoTilt 3°/7° pole mount | M10 and quick-lock rigging; 35mm pole mount |
| Network Control | EtherCON input/thru; DSP CONTROL software | - |
| Coverage | 60° x 40°, rotatable | 100° x 70° |
| Maximum SPL | 134dB peak (manufacturer specified) | 135dB peak (manufacturer specified) |
| Bass Extension (-3dB) | 60Hz (measured, vendor Spinorama data) | 65Hz (measured, vendor Spinorama data) |
| DSP | Yes, networked 10-band PEQ, filters, delay and limiter | Yes, FiRPHASE and Bass Motion Control |
| Bluetooth | No | No |
| Weight | 70.5 lbs (32 kg) | 60.2 lbs (27.3 kg) |
| Spinorama Preference Score | 3.43 | - |
| Spinorama Preference Score with Perfect Sub | 6.03 | - |
| XLR Input | Yes | Yes |
| RCA Input | No | No |
| TRS Input | Yes | 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 |
Frequency Response Compared
Both speakers’ spinorama measurements, overlaid. A flatter line is more neutral: peaks sound forward or harsh, dips sound recessed. Each curve is shifted so its average from 300 Hz to 3 kHz sits at 0 dB, so loudness differences between the two are removed and only the shape is compared.
Measurement data: HK Audio LINEAR 7 115 FA (measured by the manufacturer) and RCF NX 945-A (measured by the manufacturer), via spinorama.org.
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