Short answer: choose between the QSC K8.2 and RCF KX 08-A by matching the speaker to the deployment rather than treating their ranking positions as a universal verdict. Coverage, cabinet format, bass extension, output capability, DSP, and service support all matter in a PA system.
Why choose the QSC K8.2. This is the standout measured result in this ranking: low-quality vendor data still returns a 7.74 ideal-subwoofer preference score, continuing the K.2 series’ strong showing at every driver size. Extensive onboard DSP, a titanium compression driver and QSC’s long market track record make it an unusually safe general-purpose 8-inch pick.
Why choose the RCF KX 08-A. The entry point into RCF’s flagship KX point-source range, with a 2000W amplifier, a PKX-dome neodymium compression driver, RDNet remote control and a rotatable 90° x 70° horn in a manageable 27.6 lbs (12.5 kg) cabinet.
What to weigh before buying. The underlying Spinorama source is low quality, so its apparent measured lead deserves some caution. An 8-inch woofer means a subwoofer partner matters even more than with the larger K.2 models. The local measurement is truncated and cannot produce a preference score, and pricing/retail availability are not yet well established for this model.
Buy the QSC K8.2 when its stated coverage, output, processing, and installation format fit the job better.
Buy the RCF KX 08-A when its stated strengths better suit the venue and the rest of the system.
Still deciding? The full PA & Live Sound rankings cover every ranked option.
A superb 8 inch PA speaker, with excellent sound and flexible built in processing in a compact box.
A powerful 8 inch point source PA speaker with remote network control and a rotatable horn in a manageable cabinet.
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Specifications Side By Side
| QSC K8.2 | RCF KX 08-A | |
|---|---|---|
| Price | $749.99 | $2,308.50 |
| Ranked | #1 of 47 in 8-Inch PA Speakers | #8 of 47 in 8-Inch PA Speakers |
| Passive | No | No |
| Configuration | Active 2-way bass-reflex PA speaker | Active 2-way bass-reflex point-source PA speaker |
| Drivers | 8” woofer, 1.4” titanium compression driver | 8” woofer, 1.75” voice-coil neodymium compression driver |
| Frequency Response | 59Hz - 20kHz (-6dB, manufacturer specified) | 65Hz - 20kHz (manufacturer specified) |
| Dimensions | 17.7”H x 11”W x 10.6”D (449 x 280 x 269 mm) | 17.7”H x 10.2”W x 11.2”D (450 x 260 x 285.4 mm) |
| Coverage | 105° conical | 90° x 70°, rotatable |
| Maximum SPL | 128dB peak (manufacturer specified) | 128dB peak (manufacturer specified) |
| Inputs | 2 x XLR/TRS combo, 3.5mm aux; 2 x XLR thru and XLR mix outputs | XLR and EtherCON RDNet input/link |
| Amplifier Power | 2025W peak (1800W LF + 225W HF) | 2000W peak (1400W LF + 600W HF) |
| Cabinet Material | Impact-resistant ABS | Baltic birch plywood |
| Rigging | 2 x M10 inserts and pull-back point; 35mm pole mount | M10 inserts; 35mm pole mount |
| Bass Extension (-3dB) | 58Hz (measured, vendor Spinorama data) | 82.5Hz (measured, vendor Spinorama data) |
| DSP | Yes | Yes, RDNet remote management |
| Bluetooth | No | No |
| Weight | 26.9 lbs (12.2 kg) | 24.3 lbs (11 kg) |
| Spinorama Preference Score | 5.26 | - |
| Spinorama Preference Score with Perfect Sub | 7.74 | - |
| XLR Input | Yes | Yes |
| RCA Input | No | No |
| TRS Input | Yes | No |
| Optical Input | No | No |
| Coaxial Input | No | No |
| USB Input | No | No |
| HDMI Input | No | No |
| AES Input | No | No |
| Aux Input | Yes | No |
| Microphone Input | No | No |
| Guitar Input | No | No |
| Crossover Frequency | - | 1400Hz |
| Network Control | - | RDNet |
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: QSC K8.2 (measured by the manufacturer) and RCF KX 08-A (measured by the manufacturer), via spinorama.org.
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