Short answer: a tie on sound quality. Both are rated 4.4/5 (#2 and #1 of 38 15-inch pa speakers), so choose on features and fit.
The case for the L-Acoustics X15 HiQ: Vendor Spinorama data gives preference scores of 5.31 standalone and 8.06 with an ideal subwoofer, the highest ideal-subwoofer score in the 15-inch ranking. Watch for: This passive monitor needs an L-Acoustics amplified controller such as the LA4X or LA12X to work at all.
The case for the RCF ART 945-A: This is the strongest-measuring 15-inch RCF here: medium-quality vendor data produces a 6.69 ideal-subwoofer preference score with roughly 50Hz extension. Watch for: Pricing and wide retail distribution are not yet well established for this model, and the RCF ART9 range above the RCF ART 912-A and RCF ART 932-A pair has a shorter market track record.
Buy the L-Acoustics X15 HiQ or the RCF ART 945-A on features: they are rated the same for sound quality at close to the same price.
Looking for alternatives? See the complete PA & Live Sound rankings.
Specifications Side By Side
| L-Acoustics X15 HiQ | RCF ART 945-A | |
|---|---|---|
| Price | - | $1,999.00 |
| Ranked | #2 of 38 in 15-Inch PA Speakers | #1 of 38 in 15-Inch PA Speakers |
| Configuration | Passive 2-way coaxial PA stage monitor | Active 2-way bass-reflex PA speaker |
| Drivers | 15” neodymium woofer, 3” neodymium compression driver (coaxial) | 15” woofer, 1.4” exit/3” diaphragm compression driver |
| Frequency Response | 55Hz - 20kHz (manufacturer specified) | 45Hz - 20kHz (manufacturer specified) |
| Inputs | Speakon input and link | XLR and 1/4-inch jack input; XLR output |
| Amplifier Power | Passive speaker; requires an L-Acoustics amplified controller (LA4X, LA12X or LA7.16i) | 2100W peak (1400W LF + 700W HF) |
| Cabinet Material | Baltic birch and beech plywood | PP composite |
| Rigging | Two handles, M8 and four M10 threaded inserts, two 35mm pole sockets | M10 inserts; 35mm pole mount |
| Bass Extension (-3dB) | 73Hz (measured, vendor Spinorama data) | 50.5Hz (measured, vendor Spinorama data) |
| Coverage | 40° x 60° | 100° x 60° |
| Maximum SPL | 138dB (manufacturer specified) | 135dB peak (manufacturer specified) |
| DSP | No (passive; processing and protection come from the amplified controller) | Yes, FiRPHASE and Bass Motion Control |
| Weight | 46.3 lbs (21 kg) | 49.4 lbs (22.4 kg) |
| Spinorama Preference Score | 5.31 | 4.50 |
| Spinorama Preference Score with Perfect Sub | 8.06 | 6.69 |
| Bluetooth | No | No |
| 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 |
| Dimensions | - | 28.2”H x 16.3”W x 16.1”D (717 x 415 x 410 mm) |
| Crossover Frequency | - | 650Hz |
Related Speaker Comparisons
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- RCF ART 945-A vs Vue Audiotechnik H-15
- RCF ART 945-A vs RCF KX 45-A
- RCF ART 945-A vs RCF NX 945-A
- RCF ART 945-A vs Yamaha DZR15
- RCF ART 945-A vs JBL PRX915
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
L-Acoustics X15 HiQ Passive eBay
Pros: Vendor Spinorama data gives preference scores of 5.31 standalone and 8.06 with an ideal subwoofer, the highest ideal-subwoofer score in the 15-inch ranking. Listening-window narrow-band deviation is a low 0.186 and predicted in-room smoothness is 0.703, so vocals and stage-monitor mixes stay clean. Bass reaches about 73Hz (-3dB) with a 138dB maximum SPL from a 21kg coaxial cabinet. Measured bass extension of 73Hz (-3dB).
Cons: This passive monitor needs an L-Acoustics amplified controller such as the LA4X or LA12X to work at all. Its narrow 40° x 60° pattern suits a stage monitor but covers less of a room than wider mains. Bass reaches only about 73Hz (-3dB), so a subwoofer is still needed for full-range music.
Full L-Acoustics X15 HiQ review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | Passive speaker; requires an L-Acoustics amplified controller (LA4X, LA12X or LA7.16i) |
| Aux Input | No |
| Bass Extension (-3dB) | 73Hz (measured, vendor Spinorama data) |
| Bluetooth | No |
| Cabinet Material | Baltic birch and beech plywood |
| Coaxial Input | No |
| Configuration | Passive 2-way coaxial PA stage monitor |
| Coverage | 40° x 60° |
| DSP | No (passive; processing and protection come from the amplified controller) |
| Drivers | 15” neodymium woofer, 3” neodymium compression driver (coaxial) |
| Frequency Response | 55Hz - 20kHz (manufacturer specified) |
| Guitar Input | No |
| HDMI Input | No |
| Inputs | Speakon input and link |
| Maximum SPL | 138dB (manufacturer specified) |
| Microphone Input | No |
| Optical Input | No |
| RCA Input | No |
| Rigging | Two handles, M8 and four M10 threaded inserts, two 35mm pole sockets |
| Spinorama Preference Score | 5.31 |
| Spinorama Preference Score with Perfect Sub | 8.06 |
| TRS Input | No |
| USB Input | No |
| Weight | 46.3 lbs (21 kg) |
| XLR Input | No |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
RCF ART 945-A: $1,999.00 B&H Photo Video Guitar Center eBay
Pros: This is the strongest-measuring 15-inch RCF here: medium-quality vendor data produces a 6.69 ideal-subwoofer preference score with roughly 50Hz extension. The top-tier compression driver and 18.8kg enclosure combine unusually high output with easy portability for a 15-inch box. Measured bass extension of 50.5Hz (-3dB).
Cons: Pricing and wide retail distribution are not yet well established for this model, and the RCF ART9 range above the RCF ART 912-A and RCF ART 932-A pair has a shorter market track record. Coverage and full connector details were not confirmed in local data.
Full RCF ART 945-A review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 2100W peak (1400W LF + 700W HF) |
| Aux Input | No |
| Bass Extension (-3dB) | 50.5Hz (measured, vendor Spinorama data) |
| Bluetooth | No |
| Cabinet Material | PP composite |
| Coaxial Input | No |
| Configuration | Active 2-way bass-reflex PA speaker |
| Coverage | 100° x 60° |
| Crossover Frequency | 650Hz |
| DSP | Yes, FiRPHASE and Bass Motion Control |
| Dimensions | 28.2”H x 16.3”W x 16.1”D (717 x 415 x 410 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 and 1/4-inch jack input; XLR output |
| Maximum SPL | 135dB peak (manufacturer specified) |
| Microphone Input | No |
| Optical Input | No |
| RCA Input | No |
| Rigging | M10 inserts; 35mm pole mount |
| Spinorama Preference Score | 4.50 |
| Spinorama Preference Score with Perfect Sub | 6.69 |
| TRS Input | Yes |
| USB Input | No |
| Weight | 49.4 lbs (22.4 kg) |
| XLR Input | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons