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.

MPN: HR824

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 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) < 8dB SPL @ 1m




Amplifier Section
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




General
Power Consumption 80 watts with musical program, loud mix

18 watts quiescent (idle) 8 watts in Standby mode

AC Dropout Voltage 120V AC versions
80V AC



Weight 32 lb. each

LLIY