Mackie HR824 MK2

Submitted by Lead  Flag on 14-04-2008 @ 03:47
Mackie

Model : HR824 MK2

Brand : Mackie
Brand website :  www.mackie.com

Category : Speakers (active)



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Mackie HR824 MK2 Speakers (active)
Materials and Construction
3⁄4-inch (19 mm) thick MDF cabinet construction with internal bracing to add to cabinet stiffness, finished with 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 absorbs internal reflections, preventing delayed sound coloration. Flush-mount connector system allows monitor to be placed against a wall without need for connector clearance.


Specifications Low-frequency driver
feature Diamter : 8.75 inches (222mm)
feature Sensitivity (2.83V, 1 m): 91 dB SPL
feature Nominal Impedance: 4 ohms
feature Voice Coil Diameter: 1.6 inches (40 mm)
feature Frame: Die-cast magnesium
feature Magnet: Ferrite
feature Fully shielded: Ferrite opposing magnet

Specifications High-frequency driver
feature Sensitivity (2.83V, 1m): 91 dB SPL
feature Nominal Impedance: 6 Ohms
feature Power Handling (Long Term/Program): 20/50 watts
feature Frequency Range: 1.6 kHz to 22 kHz
feature Diaphragm/Suspension: Titanium with polymer suspension
feature Voice Coil Diameter: 1.0 inch (25.4 mm)
feature Magnet: Neodymium
feature Bucking Magnet: Ferrite opposing magnet
feature Passive Radiator: 6-inch x 12-inch (152mm x 305mm)
 -  mass-loaded elliptical flat piston with variable thickness filleted edge rubber surround.


Crossover Type : Modified Linkwitz-Riley, 24 dB/octave @ 1900 Hz


Low-frequency power amplifier
feature Rated Power (at 1 kHz with 1% THD): 150 watts
feature Rated Load Impedance: 4 ohms
feature Burst Power Output: 350 watts
feature Rated THD (1W to –1 dB of rated power): 0.1 %
feature Slew Rate: 35V/μS
feature Distortion (THD, SMPTE IMD, DIM 100): < 0.035%
feature Signal-to-Noise: > 102 dB


High-frequency power amplifier
feature Rated Power(at 1 kHz with 1% THD): 100 watts
feature Rated Load Impedance: 6 ohms
feature Burst Power Output: 210 watts
feature Rated THD (1W to –1 dB of rated power): 0.1 %
feature Slew Rate: 35V/μS
feature Distortion (THD, SMPTE IMD, DIM 100): < 0.035%
feature Signal-to-Noise: > 102 dB


Inputs
feature Balanced Differential (XLR and 1/4" TRS)
feature Unbalanced (RCA)
feature Input Protection: RFI and Level Protected
feature Maximum Input Level: +20 dBu
feature Low Frequency Filter:
 –3 dB @ 37 Hz, 2nd-order transitional high-pass filter
 –3 dB @ 47 Hz, 4th-order Chebyshev high-pass filter
 –3 dB @ 80 Hz, 4th-order Butterworth high-pass filter
feature HF Equalization: ±2 dB @ 10 kHz, shelving


Compressor
feature Independent high and low frequency overload detection
feature Low Line Voltage Shut Down: 60% of Nominal Line
feature Thermal Protection: Amplifier Shut-Down, Auto Reset
feature Muting: 5 seconds at turn-on
feature Driver Protection: Independent LF and HF Detection and overall Compression


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