Très bon état cosmétique, parfait état de fonctionnement.

MACKIE HR824 (Paire):

Paire d'enceinte de monitoring.

Enclosure Materials and Construction
3/4-inch (19mm) thick MDF construction with 1-inch (25.4mm) thick MDF front panel with radiused edges to minimize diffraction.
Proprietary exponential wave guide for controlled, wide dispersion from high-frequency driver.
Internal "H" brace adds to cabinet stiffness.
Open cell adiabatic "foam fill" acoustic 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.
Transducers
Low-frequency driver
8.75-inch (222mm) die-cast magnesium frame, mineral-filled polypropylene cone, oversized magnet structure, and over 16mm cone excursion.
High-frequency driver
1-inch (25.4mm) viscous edge-damped aluminum dome with ferrofluid-cooled voice coil.
Passive Radiator
6-inch x 12-inch (152mm x 305mm) elliptical flat cone composed of aluminum honeycomb/phenolic with variable thickness filleted edge neoprene surround, mass-loaded, acoustic insulated.

Crossover Type Modified Linkwitz-Riley, 24 dB/octave @ 1800Hz
Sensitivity 0 dBu nominal
Input Impedance 20k ohm, balanced bridging
Compressor Independent high and low frequency overload detection
Equalization Acoustic Space Equalization (at 40Hz)
A = -4dB / B = -2dB / C = flat
Roll Off EQ -3 dB@37Hz, 2nd order transitional high-pass filter
-3 dB@47Hz, 4th order Chebyshev high-pass filter
-3 dB@80Hz, 4th order Butterworth high-pass filter
High Freq. EQ ± 2 dB @ 10kHz, shelving
Acoustic Section Free Field Frequency Response ±1.5 dB, 39Hz to 20kHz
Lower cutoff frequency -3 dB @ 37Hz
Upper cutoff frequency -3 dB @ 22kHz
Sound Pressure Level at 1 meter, -7.5dBu into balanced input 100dB SPL @ 1m
Maximum peak SPL per pair 120dB SPL @ 1m
Maximum short term SPL on axis, half space 80Hz to 2.5kHz 111 dB SPL @ 1m
Residual noise (maximum gain, 600 ohms source, 20Hz-20kHz bandwidth) < 8dB SPL @ 1m
Low-frequency amplifier:
Rated power output 150 watts, 4 ohm load
Burst power output: 350 watts
Distortion THD< 0.035%
SMPTE IMD < 0.035%
DIM 100 < 0.035%
Slew Rate > 35V/µs
Signal-to-Noise Ratio > 102 dB, referenced to 150 watts into 4 ohms
 
High-frequency amplifier:
Rated power output 100 watts, 6 ohm load
Burst power output 210 watts
Distortion THD < 0.035%
SMPTE IMD < 0.035%
DIM 100 < 0.035%
Slew Rate > 35V/µs
Signal-to-Noise Ratio > 102 dB, referenced to 100 watts into 6 ohms

Power Consumption 135 watts with musical program, loud mix 18 watts quiescent (idle)
8 watts in Standby mode
AC Dropout Voltage 120V AC versions80V AC 240V AC versions 160V AC
Weight 32.5 lb. (14.77 kg)