Technical Information; Specifications - Mackie HR824 Owner's Manual

TECHNICAL INFORMATION

Specifications

Enclosure
Materials and Construction:
5 ⁄ -inch (16mm) thick MDF construction with 1-inch
8
(25.4mm) thick MDF front panel with radiused edges to
minimize diffraction.
Proprietary die-cast zinc exponential wave guide for
controlled, wide dispersion from high-frequency driver.
Two internal "H" braces adds to cabinet stiffness.
Open cell adiabatic "foam fill" acoustical damping mate-
rial absorbs internal reflections, preventing delayed
sound coloration.
Flush-mount connector system allows monitor to be
placed against a wall without need for connector clearance.
Transducers
Low-frequency driver:
Number of drivers: 2
Diameter: 6.7 inches (170 mm)
Sensitivity (2.83V, 1 m): 89 dB SPL
8 Ω
Nominal Impedance:
Voice Coil Diameter: 1.25 inches (32 mm)
Power Handling (Long Term/Program):
50/150 watts
Frequency Range: 38Hz to 6kHz
Frame: Die Cast Aluminum
Magnet: Ferrite
Bucking Magnet (Shield): Ferrite
High-frequency driver:
Sensitivity (2.83V, 1m): 91 dB SPL
6 Ω
Nominal Impedance:
Power Handling (Long Term/Program):
20/50 watts
Frequency Range: 1.6kHz to 22kHz
Diaphragm/Suspension: Aluminum/Impregnated
Cloth
Voice Coil Diameter: 1.0 inch (25.4mm)
Magnet: Ferrite
Bucking Magnet (Shield): Ferrite
Wave Guide:
2.5kHz to 20kHz, ±2 dB
Frequency Response:
Mouth Size: 6.13 inches diameter
Horizontal and Vertical Coverage:
120º, ±10º
3kHz to 20kHz
Passive Radiator:
6-inch x 9-inch (152mm x 228mm) mass-loaded
elliptical flat piston with variable thickness filleted edge
rubber surround.
Crossover Section
Crossover Type:
Modified Butterworth, 18 dB/octave @ 1.8kHz
16
Amplifier Section
Low-frequency power amplifier:
Rated Power (at 1kHz with 1% THD):
In Japan (100 VAC):
Rated Load Impedance:
Slew Rate:
Distortion (THD, SMPTE IMD, DIM 100):
Signal-to-Noise
(20Hz-20kHz, unweighted, referenced to 100W into 4Ω):
Cooling:
Design:
High-frequency power amplifier:
Rated Power(at 1kHz with 1% THD):
In Japan (100 VAC):
Rated Load Impedance:
Slew Rate:
Distortion (THD, SMPTE IMD, DIM 100):
Signal-to-Noise
(20Hz-20kHz, unweighted, referenced to 40W into 8Ω):
Cooling:
Design:
System Specifications
Input Type:
Input Impedance:
Input Protection:
Input Sensitivity:
Maximum Input Level:
Low Cut Frequency:
HF Equalization:
(156 mm) Acoustic Space:
A position:
B position:
C position:
Compressor:
Independent high and low frequency overload detection
Enclosure Alignment:
Over Excursion Prevention:
Low Line Voltage Shut Down: 67% of Nominal Line
Thermal Protection:
Muting:
Signal Sense Threshold:
Driver Protection:
100 watts
67 watts
4 Ω
15V/µS
< 0.035%
> 101 dB
Convection
Monolithic IC, Class AB,
Parametric Servo
Feedback
40 watts
28 watts
8 Ω
15V/µS
< 0.035%
> 93 dB
Convection
Monolithic IC,
Conventional Class AB
Balanced Differential
(XLR and 1/4" TRS)
Unbalanced (RCA)
20kΩ Balanced
10kΩ Unbalanced
RFI and Level Protected
+4 dBu @ 300Hz for full
output
+20 dBu
80Hz, 2nd Order,
Butterworth
Shelving ±2 dB @ 10kHz
–4 dB @ 42Hz, shelving
–2 dB @ 42Hz, shelving
flat
6 Order
th
2 nd Order High-Pass Filter
Amplifier Shut-Down,
Auto Reset
5 seconds at turn-on
–74 dBu (0.155 mV)
Compressor with
independent LF and HF
overload detection