Short answer: the Seeburg X8. It ranks #27 of 38 15-inch pa speakers by sound quality, rated 3.5/5, at $2,169. The RCF ART 745-A MK4 ranks #29, rated 3.4/5, at $1,699, $470 cheaper, not enough of a saving to outweigh the sound-quality gap.
Why pick the Seeburg X8: Bass reaches about 69Hz (-3dB) in vendor Spinorama data, and the coaxial 15-inch design claims 134dB from a 22.5kg cabinet. The catch: Listening-window narrow-band deviation is 0.571, the worst in this ranking, so the midrange response is noticeably uneven.
Why pick the RCF ART 745-A MK4: The largest ART7 compression driver, 133dB claimed peak and a light 18.8kg enclosure give this discontinued flagship useful vocal headroom for a 15-inch box. The tradeoff: The low-quality vendor data is truncated and does not yield a preference score.
Buy the Seeburg X8. It is rated higher for sound quality, and saving $470 with the RCF ART 745-A MK4 does not make up for the sound-quality gap.
Looking for alternatives? See the complete PA & Live Sound rankings.
Specifications Side By Side
| Seeburg X8 | RCF ART 745-A MK4 | |
|---|---|---|
| Price | $2,169.00 | $1,699.00 |
| Ranked | #27 of 38 in 15-Inch PA Speakers | #29 of 38 in 15-Inch PA Speakers |
| Configuration | Passive 2-way coaxial PA speaker | Active 2-way bass-reflex PA speaker |
| Drivers | 15” neodymium woofer, 1.4” neodymium compression driver (coaxial) | 15” woofer, 1.4” exit/3” diaphragm compression driver |
| Frequency Response | 50Hz - 18kHz (-6dB, manufacturer specified) | 45Hz - 20kHz (manufacturer specified) |
| Dimensions | 22.8”H x 17.7”W x 15”D (580 x 450 x 380 mm) | 27.9”H x 17.4”W x 15.2”D (708 x 442 x 387 mm) |
| Amplifier Power | Passive speaker; requires external amplification within the 600W AES / 1800W peak handling rating | 1,400W peak / 700W RMS (1,000W LF + 400W HF peak, manufacturer specified) |
| Power Handling | 600W AES / 1800W peak (manufacturer specified) | - |
| Maximum SPL | 134dB (manufacturer specified) | 133dB peak (manufacturer specified) |
| Coverage | 80° x 60° | 100° x 60° |
| DSP | No (passive) | Yes, FiRPHASE, EQ, limiting and protection |
| Weight | 49.6 lbs (22.5 kg) | 41.4 lbs (18.8 kg) |
| Bass Extension (-3dB) | 69Hz (measured, vendor Spinorama data) | 65Hz (measured, vendor Spinorama data) |
| Bluetooth | No | No |
| Spinorama Preference Score | 3.33 | - |
| Spinorama Preference Score with Perfect Sub | 6.14 | - |
| XLR Input | No | Yes |
| RCA Input | No | No |
| TRS Input | No | Yes |
| 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 |
| Inputs | - | XLR/jack combo input; XLR output |
| Crossover Frequency | - | 650Hz (manufacturer specified) |
| Cabinet Material | - | Polypropylene composite |
| Rigging | - | M10 fly points; pole mount |
Related Speaker Comparisons
More top alternatives to Seeburg X8:
- RCF NX 915-A vs Seeburg X8
- Seeburg X8 vs Vue Audiotechnik A-15
- RCF ART 945-A vs RCF ART 745-A MK4
- RCF NX 945-A vs RCF ART 745-A MK4
- Vue Audiotechnik A-15 vs RCF ART 745-A MK4
Prices on this page were last checked September 26, 2026 at 11:14 PM 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
Seeburg X8: $2,169.00 Passive Thomann eBay
Pros: Bass reaches about 69Hz (-3dB) in vendor Spinorama data, and the coaxial 15-inch design claims 134dB from a 22.5kg cabinet. Preference scores of 3.33 standalone and 6.14 with an ideal subwoofer come with a coverage pattern that stays consistent around the horn. Measured bass extension of 69Hz (-3dB).
Cons: Listening-window narrow-band deviation is 0.571, the worst in this ranking, so the midrange response is noticeably uneven. It is a passive cabinet that needs an external amplifier and processor, and the price is high next to powered 15-inch alternatives.
Full Seeburg X8 review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | Passive speaker; requires external amplification within the 600W AES / 1800W peak handling rating |
| Aux Input | No |
| Bass Extension (-3dB) | 69Hz (measured, vendor Spinorama data) |
| Bluetooth | No |
| Coaxial Input | No |
| Configuration | Passive 2-way coaxial PA speaker |
| Coverage | 80° x 60° |
| DSP | No (passive) |
| Dimensions | 22.8”H x 17.7”W x 15”D (580 x 450 x 380 mm) |
| Drivers | 15” neodymium woofer, 1.4” neodymium compression driver (coaxial) |
| Frequency Response | 50Hz - 18kHz (-6dB, manufacturer specified) |
| Guitar Input | No |
| HDMI Input | No |
| Maximum SPL | 134dB (manufacturer specified) |
| Microphone Input | No |
| Optical Input | No |
| Power Handling | 600W AES / 1800W peak (manufacturer specified) |
| RCA Input | No |
| Spinorama Preference Score | 3.33 |
| Spinorama Preference Score with Perfect Sub | 6.14 |
| TRS Input | No |
| USB Input | No |
| Weight | 49.6 lbs (22.5 kg) |
| XLR Input | No |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
RCF ART 745-A MK4: $1,699.00 Amazon B&H Photo Video Guitar Center eBay
Newer model: the RCF ART 745-A MK5, rated 3.5/5.
Pros: The largest ART7 compression driver, 133dB claimed peak and a light 18.8kg enclosure give this discontinued flagship useful vocal headroom for a 15-inch box. Measured bass extension of 65Hz (-3dB).
Cons: The low-quality vendor data is truncated and does not yield a preference score. It is discontinued and is eclipsed by the better-supported ART 745-A MK5.
Full RCF ART 745-A MK4 review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 1,400W peak / 700W RMS (1,000W LF + 400W HF peak, manufacturer specified) |
| Aux Input | No |
| Bass Extension (-3dB) | 65Hz (measured, vendor Spinorama data) |
| Bluetooth | No |
| Cabinet Material | Polypropylene composite |
| Coaxial Input | No |
| Configuration | Active 2-way bass-reflex PA speaker |
| Coverage | 100° x 60° |
| Crossover Frequency | 650Hz (manufacturer specified) |
| DSP | Yes, FiRPHASE, EQ, limiting and protection |
| Dimensions | 27.9”H x 17.4”W x 15.2”D (708 x 442 x 387 mm) |
| Drivers | 15” woofer, 1.4” exit/3” diaphragm compression driver |
| Frequency Response | 45Hz - 20kHz (manufacturer specified) |
| Guitar Input | No |
| HDMI Input | No |
| Inputs | XLR/jack combo input; XLR output |
| Maximum SPL | 133dB peak (manufacturer specified) |
| Microphone Input | No |
| Optical Input | No |
| RCA Input | No |
| Rigging | M10 fly points; pole mount |
| TRS Input | Yes |
| USB Input | No |
| Weight | 41.4 lbs (18.8 kg) |
| XLR Input | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- RCF ART 745-A MK4 vs LD Systems Stinger 15-A-G3
- RCF ART 745-A MK4 vs FBT J15A
- RCF ART 745-A MK4 vs Vue Audiotechnik A-15
- RCF ART 745-A MK4 vs Martin Audio XP15
- RCF ART 745-A MK4 vs RCF ART 745-A MK5
- RCF ART 745-A MK4 vs RCF ART 735-A MK4
- RCF ART 745-A MK4 vs RCF NX 915-A
- RCF ART 745-A MK4 vs RCF ART 715-A MK5
- See all 20 comparisons