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Mackie HR824 Active 8" 2-way High Resolution Reference Monitor It's the only part of your studio that you actually hear. That's why the HR824 has been meticulously designed to be a completely neutral instrument for the analysis of your creative output. And why you shouldn't compromise your work with anything less. The HR824 in action really is a revelation. The stereo sound field is wide, deep, and incredibly detailed. High frequencies and midrange are clean and articulated. Low frequencies are no more or less than what you recorded -- you can actually hear the distinct tonal qualities (and harmonic quantities) of a particular bass instrument -- instead of just a "generic" bass note. Most important, the sweet spot is a broad, three-dimensional area that gives you room to move up, down and across the console. In short, instead of having its own distinctive "sound," the HR824 sounds like the outputs of your mixer. Features: Enclosure Materials and Construction 3/4" (19mm) thick MDF construction with 1" (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" (222mm) die-cast magnesium frame, mineral-filled polypropylene cone, oversized magnet structure, and over 16mm cone excursion. High-frequency driver 1" (25.4mm) viscous edge-damped aluminum dome with ferrofluid-cooled voice coil. Passive Radiator 6 x 12 in. (152 x 305mm) elliptical flat cone composed of aluminum honeycomb/phenolic with variable thickness filleted edge neoprene surround, mass-loaded, acoustic insulated. Crossover Section 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 500Hz): A = -4dB B = -2dB C = flat Roll Off EQ: -3 dB @ 50Hz or 80Hz, 12dB/octave Multiple Feedback High Pass filter High Freq. EQ: 2 dB @ 10kHz, shelving Acoustic Section Free Field Frequency Response: 1.5 dB, 39Hz to 22kHz Lower cutoff frequency: -3 dB @ 38Hz Upper cutoff frequency: -3 dB @ 22.5kHz Sound Pressure Level at 1 meter, -7.5dBu into balanced input 100dB SPL @ 1m Maximum peak SPL per pair 121dB 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)
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