Short answer: it depends on whether you want self-powered convenience or the better-measuring cabinet. These rank #8 and #9 out of 47 8-inch powered PA speakers, and the two take very different approaches to the same size class.
The KX 08-A is RCF’s flagship 8-inch point source, but it hasn’t produced a confirmed measurement result. It packs a 2000W amplifier, a PKX-dome neodymium compression driver and a rotatable 90° x 70° horn with RDNet remote control into a manageable 27.6 lbs (12.5 kg) cabinet, at $2,308.50. Its local Spinorama measurement is truncated, though, so there’s no computed preference score to confirm its tonal performance.
The A-8 is passive, but its measured result is the strongest of the two. Low-quality vendor data still shows a 5.61 ideal-subwoofer preference score, the best documented result between these two, from a neodymium woofer and aluminum-dome compression driver on a rotatable 70° x 55° horn. Being passive, it needs external amplification and processing to run, adding setup cost and complexity the self-powered KX 08-A avoids, and its measured bass extension is shallow at roughly 90Hz.
What the KX 08-A adds:
- Built-in 2000W amplification, so there’s no external amp to buy or configure.
- RDNet remote control, letting you monitor and adjust the speaker from a networked system.
- A wider, rotatable 90° x 70° horn versus the A-8’s 70° x 55°.
Buy the KX 08-A if you want a self-powered, network-controllable point source and don’t need a confirmed measurement to trust RCF’s flagship engineering.
Buy the A-8 if you already have amplification in place and want the better-documented measured result, and don’t mind the shallower bass extension.
Looking for alternatives? See the complete PA & Live Sound rankings.
A powerful 8 inch point source PA speaker with remote network control and a rotatable horn in a manageable cabinet.
A passive 8 inch PA speaker with good sound and a rotatable horn, a flexible choice for installers.
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Specifications Side By Side
| RCF KX 08-A | Vue Audiotechnik A-8 | |
|---|---|---|
| Price | $2,308.50 | $999 Passive |
| Ranked | #8 of 47 in 8-Inch PA Speakers | #9 of 47 in 8-Inch PA Speakers |
| Passive | No | Yes |
| Configuration | Active 2-way bass-reflex point-source PA speaker | Passive 2-way bass-reflex PA speaker |
| Drivers | 8” woofer, 1.75” voice-coil neodymium compression driver | 8” neodymium woofer, aluminum-dome compression driver |
| Frequency Response | 65Hz - 20kHz (manufacturer specified) | 75Hz - 20kHz (manufacturer specified) |
| Dimensions | 17.7”H x 10.2”W x 11.2”D (450 x 260 x 285.4 mm) | 18.1” x 11.3” x 10.8” (460 x 286 x 274 mm) |
| Coverage | 90° x 70°, rotatable | 70° x 55°, rotatable |
| Maximum SPL | 128dB peak (manufacturer specified) | 124dB peak (manufacturer specified) |
| Inputs | XLR and EtherCON RDNet input/link | 2x Neutrik NL-4 Speakon |
| Amplifier Power | 2000W peak (1400W LF + 600W HF) | Passive speaker; external amplifier required (manufacturer output rating not published in the current product page) |
| Crossover Frequency | 1400Hz | - |
| Cabinet Material | Baltic birch plywood | Multi-ply cross-grain laminated birch plywood |
| Rigging | M10 inserts; 35mm pole mount | Integrated fly points and pole-mount system |
| Network Control | RDNet | - |
| Bass Extension (-3dB) | 82.5Hz (measured, vendor Spinorama data) | 90Hz (measured, vendor Spinorama data) |
| DSP | Yes, RDNet remote management | No (passive, passive crossover network only) |
| Bluetooth | No | No |
| Weight | 24.3 lbs (11 kg) | 28.9 lbs (13.1 kg) |
| XLR Input | Yes | No |
| RCA Input | No | - |
| TRS Input | No | - |
| Optical Input | No | - |
| Coaxial Input | No | - |
| USB Input | No | - |
| HDMI Input | No | - |
| AES Input | No | - |
| Aux Input | No | No |
| Microphone Input | No | No |
| Guitar Input | No | No |
| Spinorama Preference Score | - | 2.35 |
| Spinorama Preference Score with Perfect Sub | - | 5.61 |
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: RCF KX 08-A (measured by the manufacturer) and Vue Audiotechnik A-8 (measured by the manufacturer), via spinorama.org.
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