Short answer: choose between the LD Systems DDQ15 and Axiom ED150A for the deployment, not from the automatic ranking alone. Their driver format, power requirements, coverage, bass reach, output capability, and control features determine which is the more practical PA for a particular room or system.
The case for the LD Systems DDQ15. Medium-quality vendor data returns a 5.79 ideal-subwoofer preference score, among the best in this ranking, with 42Hz measured extension. A Faital Pro woofer, BMS compression driver, birch-ply cabinet and biamped Hypex Class-D modules with a 24-bit Sharc DSP give it genuine touring-class engineering.
The case for the Axiom ED150A. High-quality vendor data returns a 5.36 ideal-subwoofer preference score with 47Hz measured extension, matching the well-regarded ED120A’s asymmetric-coverage design in a 15-inch cabinet.
Important trade-offs. LD Systems has a smaller professional-audio service network than JBL, Yamaha or RCF in North America, and the rotatable HF horn’s 80° x 50° pattern is on the narrower side for wide-audience main use. Axiom has a much smaller North American dealer and service network than JBL, Yamaha or QSC, and detailed coverage/weight figures were not confirmed in local data.
Buy the LD Systems DDQ15 when its stated format, coverage, and system features fit the job better.
Buy the Axiom ED150A when its stated output, control, and deployment strengths better match the system.
Want more options? Browse the full PA & Live Sound rankings.
A touring grade powered 15 inch PA speaker with good sound, deep bass and premium drivers in a birch cabinet.
A powered 15 inch PA speaker with good sound, deep bass and an asymmetric pattern that spreads sound evenly over an audience.
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Specifications Side By Side
| LD Systems DDQ15 | Axiom ED150A | |
|---|---|---|
| Price | $1,800 Discontinued | $1,990 |
| Ranked | #16 of 76 in 15-Inch PA Speakers | #18 of 76 in 15-Inch PA Speakers |
| Passive | No | No |
| Configuration | Active 2-way bi-amped bass-reflex PA speaker | Active 2-way bass-reflex PA speaker |
| Drivers | 15” Faital Pro neodymium woofer, BMS compression driver | 15” woofer, compression driver |
| Frequency Response | 38Hz - 20kHz (manufacturer specified) | 50Hz - 17kHz (-6dB, manufacturer specified) |
| Dimensions | 30”H x 16.5”W x 19.2”D (763 x 420 x 488 mm) | 30.1”H x 17.7”W x 15.7”D (765 x 450 x 400 mm) |
| Inputs | XLR line input | Neutrik XLR input and link output |
| Amplifier Power | 1,400W RMS (2 x 700W Class D, manufacturer specified) | 1,200W continuous (900W LF + 300W HF Class D, manufacturer specified) |
| Crossover Frequency | 1.3kHz (manufacturer specified) | - |
| Cabinet Material | 15/18mm birch plywood with Polyurea finish | 15mm reinforced phenolic birch plywood |
| Rigging | 13 M10 fly points; 36mm pole flange | M10 and M6 fly points; pole-mount socket |
| Coverage | 80° x 50°, rotatable | 60-100° horizontal (asymmetric), 60° vertical average |
| Maximum SPL | 136dB peak (manufacturer specified) | 132dB peak (manufacturer specified) |
| Bass Extension (-3dB) | 47.5Hz (measured, vendor Spinorama data) | 54.5Hz (measured, vendor Spinorama data) |
| DSP | Yes, 24-bit/48kHz Sharc DSP with 1ms look-ahead limiter | Yes |
| Bluetooth | No | No |
| Spinorama Preference Score | 3.77 | 3.14 |
| Spinorama Preference Score with Perfect Sub | 5.79 | 5.36 |
| Subwoofer Output | Yes | - |
| Outputs | XLR link output, XLR sub output | - |
| XLR Input | Yes | Yes |
| RCA Input | No | No |
| TRS Input | No | 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 |
| Weight | 69.4 lbs (31.5 kg) | 68.3 lbs (31 kg) |
| Network Control | - | PRONET control over EtherCON/CANBUS |
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: LD Systems DDQ15 (measured by the manufacturer) and Axiom ED150A (measured by the manufacturer), via spinorama.org.
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