Short answer: the JBL PRX908 for most buyers. These rank #5 and #6 out of 15 8-inch powered PA speakers. The PRX908 costs $799 against $3300 for the KX 08-A, and only one of the two has a confirmed measured preference score.
The PRX908 has proven numbers behind it. High-quality vendor data gives it a 4.95 ideal-subwoofer preference score with 58Hz measured extension. The KX 08-A’s local measurement is truncated and cannot produce a preference score at all, so its acoustic performance relative to the PRX908 is currently unconfirmed despite RCF’s flagship KX branding.
Control and connectivity favor the PRX908. It carries a 12-band parametric EQ with dbx DriveRack feedback suppression and Bluetooth control through the JBL Pro Connect app. The KX 08-A instead relies on RCF’s RDNet EtherCON network protocol for remote management, which suits a rigged multi-box RDNet system more than a standalone box.
What the KX 08-A adds:
- A rotatable 90 degree x 70 degree horn, versus the PRX908’s fixed 105 x 60 degree pattern.
- A titanium PKX-dome neodymium compression driver in a lighter 12.5kg cabinet, against the PRX908’s 13.7kg.
- A slightly higher claimed peak SPL of 128dB versus 126dB.
Everything else is close: both are 2-way bass-reflex 8-inch actives with roughly 2000W peak amplifier sections, M10 rigging points, and a subwoofer-partner caveat noted in each speaker’s own review.
Buy the JBL PRX908 for the confirmed measurement data, onboard parametric EQ, and app-based control.
Buy the RCF KX 08-A if you are already standardized on RDNet for remote system management and want the rotatable horn for room-specific coverage.
Specifications Side By Side
| JBL PRX908 | RCF KX 08-A | |
|---|---|---|
| Price | $799.00 | $3,300.00 |
| Ranked | #5 of 15 in 8-Inch Two-Way Powered PA Speakers | #6 of 15 in 8-Inch Two-Way Powered PA Speakers |
| Configuration | Active 2-way bass-reflex PA speaker | Active 2-way bass-reflex point-source PA speaker |
| Drivers | 8" woofer, 1.5" compression driver | 8" woofer, 1.75" voice-coil neodymium compression driver |
| Frequency Response | 55Hz - 20kHz (-10dB, manufacturer specified) | 65Hz - 20kHz (manufacturer specified) |
| Dimensions | 18.9"H x 12.3"W x 11.2"D (479 x 312 x 285 mm) | 17.7"H x 10.2"W x 11.2"D (450 x 260 x 285.4 mm) |
| 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 | 2000W peak / 1000W RMS | 2000W peak (1400W LF + 600W HF) |
| Crossover Frequency | 1930Hz | 1400Hz |
| Cabinet Material | Polypropylene/talc composite | Baltic birch plywood |
| Rigging | 6 x M10 suspension points; dual 36mm pole sockets | M10 inserts; 35mm pole mount |
| Coverage | 105° x 60° | 90° x 70°, rotatable |
| Maximum SPL | 126dB peak (manufacturer specified) | 128dB peak (manufacturer specified) |
| Bass Extension (-3dB) | 63Hz (measured, vendor Spinorama data) | 82.5Hz (measured, vendor Spinorama data) |
| DSP | Yes, 12-band parametric EQ and dbx DriveRack | Yes, RDNet remote management |
| Bluetooth | Yes, control via JBL Pro Connect app | No |
| Weight | 30.2 lbs / 13.7 kg | 24.3 lbs / 11 kg |
| Network Control | - | RDNet |
Related Speaker Comparisons
A few more comparisons worth a look in the same class:
- Vue Audiotechnik A-8 vs FBT J8A
- Vue Audiotechnik A-8 vs LD Systems Stinger 8-A-G3
- Turbosound NuQ82 vs Vue Audiotechnik A-8
- RCF KX 08-A vs Vue Audiotechnik A-8
- RCF KX 08-A vs LD Systems Stinger 8-A-G3
Prices on this page were last checked September 7, 2026 at 7:47 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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The Two Speakers In Full
JBL PRX908: $799.00 Amazon B&H Photo Video Guitar Center eBay
Pros: High-quality vendor data shows a 4.95 ideal-subwoofer preference score with 58Hz measured extension, backed by JBL’s extensive service network. A 12-band parametric EQ with dbx DriveRack feedback suppression and BLE app control carry over the PRX900 series’ engineering into an 8-inch cabinet.
Cons: Its 126dB peak claim is modest for a main speaker, so pairing with a subwoofer matters more here than with the larger PRX modules.
Full JBL PRX908 review and specifications →
| Amplifier Power | 2000W peak / 1000W RMS |
|---|---|
| Bass Extension (-3dB) | 63Hz (measured, vendor Spinorama data) |
| Bluetooth | Yes, control via JBL Pro Connect app |
| Cabinet Material | Polypropylene/talc composite |
| Configuration | Active 2-way bass-reflex PA speaker |
| Coverage | 105° x 60° |
| Crossover Frequency | 1930Hz |
| DSP | Yes, 12-band parametric EQ and dbx DriveRack |
| Dimensions | 18.9"H x 12.3"W x 11.2"D (479 x 312 x 285 mm) |
| Drivers | 8" woofer, 1.5" compression driver |
| Frequency Response | 55Hz - 20kHz (-10dB, manufacturer specified) |
| Inputs | 2 x XLR/TRS combo, 3.5mm aux; 2 x XLR thru and XLR mix outputs |
| Maximum SPL | 126dB peak (manufacturer specified) |
| Rigging | 6 x M10 suspension points; dual 36mm pole sockets |
| Weight | 30.2 lbs / 13.7 kg |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
RCF KX 08-A: $3,300.00 B&H Photo Video Guitar Center eBay
Pros: 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 12.5kg cabinet.
Cons: The local measurement is truncated and cannot produce a preference score, and pricing/retail availability are not yet well established for this model.
Full RCF KX 08-A review and specifications →
| Amplifier Power | 2000W peak (1400W LF + 600W HF) |
|---|---|
| Bass Extension (-3dB) | 82.5Hz (measured, vendor Spinorama data) |
| Bluetooth | No |
| Cabinet Material | Baltic birch plywood |
| Configuration | Active 2-way bass-reflex point-source PA speaker |
| Coverage | 90° x 70°, rotatable |
| Crossover Frequency | 1400Hz |
| DSP | Yes, RDNet remote management |
| Dimensions | 17.7"H x 10.2"W x 11.2"D (450 x 260 x 285.4 mm) |
| Drivers | 8" woofer, 1.75" voice-coil neodymium compression driver |
| Frequency Response | 65Hz - 20kHz (manufacturer specified) |
| Inputs | XLR and EtherCON RDNet input/link |
| Maximum SPL | 128dB peak (manufacturer specified) |
| Network Control | RDNet |
| Rigging | M10 inserts; 35mm pole mount |
| Weight | 24.3 lbs / 11 kg |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons