Short answer: choose between the JBL PRX908 and RCF ART 708-A MK4 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. The RCF ART 708-A MK4 is discontinued; its replacement is the RCF ART 708-A MK5.
Why choose the JBL PRX908. High-quality vendor data shows a 5.69 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.
Why choose the RCF ART 708-A MK4. The 22.9 lbs (10.4 kg) cabinet combines 127dB claimed peak output, a broad horn and RCF’s FiRPHASE processing in a straightforward, affordable package for an 8-inch box.
What to weigh before buying. Its 126dB peak claim is modest for a main speaker, so pairing with a subwoofer matters more here than with the larger PRX modules. The low-quality vendor measurement is truncated and cannot produce a reliable preference score.
Buy the JBL PRX908 when its stated coverage, output, processing, and installation format fit the job better.
Buy the RCF ART 708-A MK4 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 compact powered 8 inch PA speaker with well balanced sound, Bluetooth app control and feedback suppression for gigs and monitors.
A discontinued, affordable powered 8 inch PA speaker with a broad horn and simple setup.
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Specifications Side By Side
| JBL PRX908 | RCF ART 708-A MK4 | |
|---|---|---|
| Price | $699.00 | $525.00 Discontinued |
| Ranked | #6 of 47 in 8-Inch PA Speakers | #37 of 47 in 8-Inch PA Speakers |
| Passive | No | No |
| Configuration | Active 2-way bass-reflex PA speaker | Active 2-way bass-reflex PA speaker |
| Drivers | 8” woofer, 1.5” compression driver | 8” woofer, 1” compression driver |
| Frequency Response | 55Hz - 20kHz (-10dB, manufacturer specified) | 60Hz - 20kHz (manufacturer specified) |
| Dimensions | 18.9”H x 12.3”W x 11.2”D (479 x 312 x 285 mm) | 18.9”H x 11.5”W x 10.9”D (480 x 291 x 276 mm) |
| Inputs | 2 x XLR/TRS combo, 3.5mm aux; 2 x XLR thru and XLR mix outputs | XLR/jack combo input; XLR output |
| Amplifier Power | 2000W peak / 1000W RMS | 800W peak / 400W RMS (600W LF + 200W HF peak, manufacturer specified) |
| Crossover Frequency | 1930Hz | 1.6kHz (manufacturer specified) |
| Cabinet Material | Polypropylene/talc composite | Polypropylene composite |
| Rigging | 6 x M10 suspension points; dual 36mm pole sockets | Two M10 fly points; 35mm pole socket |
| Coverage | 105° x 60° | 100° x 70° |
| Maximum SPL | 126dB peak (manufacturer specified) | 127dB peak (manufacturer specified) |
| Bass Extension (-3dB) | 63Hz (measured, vendor Spinorama data) | 75Hz (measured, vendor Spinorama data) |
| DSP | Yes, 12-band parametric EQ and dbx DriveRack | Yes, FiRPHASE, EQ, limiting and protection |
| Bluetooth | Yes, control via JBL Pro Connect app | No |
| Weight | 30.2 lbs (13.7 kg) | 22.9 lbs (10.4 kg) |
| Spinorama Preference Score | 3.10 | - |
| Spinorama Preference Score with Perfect Sub | 5.69 | - |
| 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 | Yes | 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: JBL PRX908 (measured by the manufacturer) and RCF ART 708-A MK4 (measured by the manufacturer), via spinorama.org.
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