Short answer: the RCF NX 915-A. It ranks #31 of 76 15-inch pa speakers by sound quality, rated 3.6/5, at $1,541; the Seeburg X8 ranks #37, rated 3.5/5, and costs $2,169, so there is little reason to consider the other one.
The RCF NX 915-A is the deeper-bass option. A sturdy powered 15 inch PA speaker in plywood with wide coverage, flexible rigging and onboard bass processing. Its bass reaches about 53Hz before falling 3dB, against 69Hz for the Seeburg X8. The catch: The truncated vendor measurement does not yield a preference score, preventing a confident tonal comparison with the scored leaders.
Why pick the Seeburg X8: A passive coaxial 15 inch PA speaker with loud output and coverage that stays consistent around the horn. The tradeoff: Listening-window narrow-band deviation is 0.571, the worst in this ranking, so the midrange response is noticeably uneven.
Buy the RCF NX 915-A. It is rated higher for sound quality than the Seeburg X8 and costs less, so only choose the other one for a particular feature it does better.
Looking for alternatives? See the complete PA & Live Sound rankings.
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Specifications Side By Side
| RCF NX 915-A | Seeburg X8 | |
|---|---|---|
| Price | $1,541.00 | $2,169.00 Passive |
| Ranked | #31 of 76 in 15-Inch PA Speakers | #37 of 76 in 15-Inch PA Speakers |
| Passive | No | Yes |
| Configuration | Active 2-way bass-reflex PA speaker | Passive 2-way coaxial PA speaker |
| Drivers | 15” woofer, compression driver | 15” neodymium woofer, 1.4” neodymium compression driver (coaxial) |
| Frequency Response | 45Hz - 20kHz (manufacturer specified) | 50Hz - 18kHz (-6dB, manufacturer specified) |
| Dimensions | 27.8”H x 16.5”W x 17.7”D (705 x 419.6 x 450.4 mm) | 22.8”H x 17.7”W x 15”D (580 x 450 x 380 mm) |
| Coverage | 100° x 60° | 80° x 60° |
| Maximum SPL | 131dB peak (manufacturer specified) | 134dB (manufacturer specified) |
| Inputs | XLR/TRS combo input and XLR output | - |
| Amplifier Power | 2100W peak (1400W LF + 700W HF) | Passive speaker; requires external amplification within the 600W AES / 1800W peak handling rating |
| Crossover Frequency | 1600Hz | - |
| Cabinet Material | Polyurea-coated plywood | - |
| Rigging | 6 x M10 inserts | 9 x M10 inserts; 35mm pole mount |
| Bass Extension (-3dB) | 53Hz (measured, vendor Spinorama data) | 69Hz (measured, vendor Spinorama data) |
| DSP | Yes, FiRPHASE and Bass Motion Control | No (passive) |
| Bluetooth | No | No |
| Weight | 53.1 lbs (24.1 kg) | 49.6 lbs (22.5 kg) |
| XLR Input | Yes | No |
| 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 | No | No |
| Microphone Input | No | No |
| Guitar Input | No | No |
| Power Handling | - | 600W AES / 1800W peak (manufacturer specified) |
| Spinorama Preference Score | - | 3.33 |
| Spinorama Preference Score with Perfect Sub | - | 6.14 |
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