Mackie HR824mk2 Specifications

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TECHNICAL INFORMATION

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Low-frequency power amplifier
Rated Power (at 1 kHz with 1% THD):
150 watts
Rated Load Impedance: 4 ohms
Burst Power Output: 350 watts
Rated THD (1W to –1 dB of rated power):

0.1 %
Slew Rate: 35V/µS
Distortion (THD, SMPTE IMD, DIM 100):
< 0.035%
Signal-to-Noise
(20Hz-20kHz, unweighted, referenced to 150W into 4!):
> 102 dB
Cooling: Convection
Design: Class AB, Parametric Servo
Feedback

High-frequency power amplifier
Rated Power(at 1 kHz with 1% THD):
100 watts
Rated Load Impedance: 6 ohms
Burst Power Output: 210 watts
Rated THD (1W to –1 dB of rated power):

0.1 %
Slew Rate: 35V/µS
Distortion (THD, SMPTE IMD, DIM 100):
< 0.035%
Signal-to-Noise
(20 Hz-20 kHz, unweighted, referenced to 100 W into 6 ohms):
> 102 dB
Cooling: Convection
Design: 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:
–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
HF Equalization: ±2 dB @ 10 kHz, shelving
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
Low Line Voltage Shut Down:

60% of Nominal Line
Thermal Protection: Amplifier Shut-Down, Auto Reset
Muting: 5 seconds at turn-on
Driver Protection: Independent LF and HF Detection
Overall Compression

HR824 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 ab­sorbs 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: 8.75 inches (222mm)
Sensitivity (2.83V, 1 m): 91 dB SPL
Nominal Impedance: 4 ohms
Voice Coil Diameter: 1.6 inches (40 mm)
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 (25.4 mm)
Magnet: Neodymium
Bucking Magnet: Ferrite opposing magnet

Passive Radiator:
6-inch x 12-inch (152mm x 305mm) mass-loaded elliptical flat
piston with variable thickness filleted edge rubber surround.

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

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Free-Field Frequency Response:
±1.5 dB, 37 Hz to 20 kHz

Lower cutoff frequency: –3 dB @ 35 Hz

Upper cutoff frequency:

–3 dB @ 22 kHz

Sound Pressure Level at 1 meter,
–7.5 dBu into balanced input: 100 dB SPL @ 1m

Maximum peak SPL per pair: 120 dB SPL @ 1m

Maximum short term SPL on axis,
half space 80 Hz to 2.5 kHz: 111 dB SPL @ 1m

Residual noise (maximum gain, 600! source,
20 Hz-20 kHz bandwidth): < 8 dB SPL @ 1m

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Power consumption:
Standby mode: 8 watts
Quiescent (idle): 18 watts
Musical Program, Loud mix: 135 watts

US: 120 VAC, 60 Hz
Europe: 240 VAC, 50 Hz
Korea: 220 VAC, 60 Hz
Japan: 100 V, 50-60 Hz
Rated Power
(For UL-6500, CSA-E65-94, EN-60065):
150 watts

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Height: 16.8 in/42.5 cm
Width: 10.8 in/27.3 cm
Depth Enclosure: 11.4 in/29.0 cm
Depth Overall: 13.8 in/35.1 cm
Weight: 34.6 lb/15.7 kg

LOUD Technologies is always striving to improve our products
by incorporating new and improved materials, components and
manufacturing methods. Therefore, we reserve the right to change
these specifications at any time without notice.

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11.4" (29.0 cm)

13.8" (35.1 cm)

16.8"

(42.5 cm)

HR824 MK2

WEIGHT

34.6 lb

(15.7 kg)

10.8" (27.3 cm)

HR824 Acoustic Space Filter Response

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HR824 High Frequency EQ Filter Response

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HR824 Low Frequency Filter Response

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