HD1531
Appendix C: Technical Information
HD1531 Specifications
Acoustic Performance:
Frequency Response | 38 |
Frequency Response | 50 |
Horizontal Coverage | 90 degrees averaged |
| 2 kHz to 10 kHz |
Vertical Coverage | 40 degrees averaged |
| 2 kHz to 10 kHz |
Directivity Index (dB) | 10.7 averaged |
| 2 kHz to 10 kHz |
Directivity Factor (Q) | 11.9 averaged |
| 2 kHz to 10 kHz |
Max peak SPL (calculated) | 135 dB |
Max peak SPL (measured) | 126 dB |
Crossover Points | 400 Hz, 1500 Hz |
Equalization
Contour EQ
Low Shelving | |
| 80 Hz, 6 dB / octave |
| 100 Hz to 8 kHz, Q=1.5 |
High Shelving | |
| 12 kHz, 6 dB / octave |
High-Frequency Section
Voice Coil Diameter | 1.75” / 44.5 mm |
Horn Entry Diameter | 1.0” / 25 mm |
Diaphragm Material | |
Magnet Material | Ferrite |
Mid-Frequency Section
Diameter | 6.0” / 152.4 mm |
Diaphragm Material | Paper |
Magnet Material | Ferrite |
Power Amplifiers
Low Frequency Power Amplifier
Rated Power | 700 watts rms |
| 1400 watts peak |
Rated THD | < 0.03% |
Design | Class D |
Mid Frequency Power Amplifier |
|
Rated Power | 100 watts rms each |
| 200 watts peak |
Rated THD | < 0.03% |
Design | Class D |
High Frequency Power Amplifier |
|
Rated Power | 100 watts rms each |
| 200 watts peak |
Rated THD | < 0.03% |
Design | Class D |
Input/Output
Input Type | Female XLR balanced |
Input Impedance | 11 kohm balanced |
Loop Out | Male XLR balanced |
Line Input Power
US model | 120 VAC, 60 Hz |
Recommended Service | 9 amps |
European model | 230 VAC, 50 Hz |
Recommended Service | 5 amps |
AC Connector |
Safety Features
Input Protection: | RMS limiting, power supply and |
| amplifier thermal protection |
Display LEDs: | Power ON, EQ ON, Sig / Limit, |
| Thermal protection, Front Power |
| ON |
Low-Frequency Section
Woofer Diameter | 15.0” / 381 mm |
Voice Coil Diameter | 3.0” / 76.2 mm |
Diaphragm Material | Paper |
Magnet Material | Neodymium |
Calculated from driver sensitivity and amplifier power. Measured with pink noise, free field at 1 meter, before limiting.
Construction Features
Basic Design | Trapezoidal, 20 degree included |
| angle |
Material | 15 mm exterior grade premium |
| birch plywood |
Finish | High durability black paint |
Handles | One on each side |
Grille | |
Fly Points | Twelve M10 x 1.5 mm |
12 | HD1531 |