Mackie HR624 MK2 Specifications

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TECHNICAL INFORMATION
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Low-frequency power amplifier
Rated Power (at 1 kHz with 1% THD):
100 watts
Rated Load Impedance: 4 ohms
Rated THD (1W to –1 dB of rated power):
0.1 %
Slew Rate: 15V/µS
Distortion (THD, SMPTE IMD, DIM 100):
< 0.035%
Signal-to-Noise
(20Hz-20kHz, unweighted, referenced to 100W into 4!):
> 101 dB
Cooling: Convection
Design: Monolithic IC, Class AB,
Parametric Servo Feedback
High-frequency power amplifier
Rated Power(at 1 kHz with 1% THD):
40 watts
Rated Load Impedance: 6 ohms
Rated THD (1W to –1 dB of rated power):
0.1 %
Slew Rate: 15V/µS
Distortion (THD, SMPTE IMD, DIM 100):
< 0.035%
Signal-to-Noise
(20 Hz-20 kHz, unweighted, referenced to 40 W into 8!):
> 93 dB
Cooling: Convection
Design: Monolithic IC,
Conventional Class AB
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Input Type: Balanced Differential
(XLR and 1/4" TRS)
Unbalanced (RCA)
Input Impedance: 20 k
! Balanced
10 k
! Unbalanced
Input Protection: RFI and Level Protected
Maximum Input Level: +20 dBu
Low Frequency Filter: 80 Hz, 2nd Order, Butterworth
HF Equalization: Shelving ±2 dB @ 10 kHz
Acoustic Space:
A position: –4 dB @ 50 Hz, shelving
B position: –2 dB @ 50 Hz, shelving
C position: Flat
Compressor:
Independent high and low frequency overload detection
Enclosure Alignment: 6th Order
Over Excursion Prevention: 2nd Order High-Pass Filter
Low Line Voltage Shut Down:
60% of Nominal Line
Thermal Protection: Amplifier Shut-Down, Auto Reset
Muting: 5 seconds at turn-on
Signal Sense Threshold: –74 dBu (0.155 mV)
Driver Protection: Independent LF and HF Detection
Overall Compression
HR624 MK2 Specifications
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Materials and Construction:
3
4-inch (19 mm) thick MDF cabinet construction with internal
bracing to add to cabinet stiffness.
Piano-black gloss finish.
Die-cast aluminum exponential wave guide for controlled, wide
dispersion from high-frequency driver and Zero Edge Baffle™ to
minimize diffraction around the cabinet edges.
Open cell adiabatic “foam fill” acoustical damping material ab-
sorbs internal reflections, preventing delayed sound coloration.
Flush-mount connector system allows monitor to be placed
against a wall without need for connector clearance.
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Low-frequency driver:
Diameter: 6.7 inches (170mm)
Sensitivity (2.83V, 1 m): 89 dB SPL
Nominal Impedance: 4
!
Voice Coil Diameter: 1.25 inches (32mm)
Power Handling (Long Term/Program):
50/150 watts
Frequency Range: 45 Hz to 6 kHz
Frame: Die-cast magnesium
Magnet: Ferrite
Fully shielded: Ferrite opposing magnet
High-frequency driver:
Sensitivity (2.83V, 1m): 91 dB SPL
Nominal Impedance:
6
!
Power Handling (Long Term/Program):
20/50 watts
Frequency Range: 1.6 kHz to 22 kHz
Diaphragm/Suspension: Titanium with polymer suspension
Voice Coil Diameter: 1.0 inch (25.4mm)
Magnet: Neodymium
Bucking Magnet: Ferrite opposing magnet
Passive Radiator:
6-inch x 9-inch (152mm x 228mm) mass-loaded elliptical flat
piston with variable thickness filleted edge rubber surround.
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Crossover Type:
Modified Linkwitz-Riley, 24 dB/octave @ 3 kHz