MK2

TECHNICAL INFORMATION

HR624

HR624 MK2 Specifications

Enclosure

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.

Transducers

Low-frequency driver:

 

Diameter:

6.7 inches (170mm)

Sensitivity (2.83V, 1 m):

89 dB SPL

Nominal Impedance:

4 Ω

Voice Coil Diameter:

1.25 inches (32mm)

Power Handling (Long Term/Program):

 

50/150 watts

Frequency Range:

45 Hz to 6 kHz

Frame:

Die-cast magnesium

Magnet:

Ferrite

Fully shielded:

Ferrite opposing magnet

High-frequency driver:

 

Sensitivity (2.83V, 1m):

91 dB SPL

Nominal Impedance:

6 Ω

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 (25.4mm)

Magnet:

Neodymium

Bucking Magnet:

Ferrite opposing magnet

Passive Radiator:

6-inch x 9-inch (152mm x 228mm) mass-loaded elliptical flat piston with variable thickness filleted edge rubber surround.

Crossover Section

Crossover Type:

Modified Linkwitz-Riley, 24 dB/octave @ 3 kHz

Amplifier Section

Low-frequency power amplifier

Rated Power (at 1 kHz with 1% THD):

 

100 watts

Rated Load Impedance:

4 ohms

Rated THD (1W to –1 dB of rated power):

 

0.1 %

Slew Rate:

15V/µS

Distortion (THD, SMPTE IMD, DIM 100): < 0.035%

Signal-to-Noise

(20Hz-20kHz, unweighted, referenced to 100W into 4Ω):

>101 dB

Cooling:Convection

Design:

Monolithic IC, Class AB,

 

Parametric Servo Feedback

High-frequency power amplifier

Rated Power(at 1 kHz with 1% THD):

 

40 watts

Rated Load Impedance:

6 ohms

Rated THD (1W to –1 dB of rated power):

 

0.1 %

Slew Rate:

15V/µS

Distortion (THD, SMPTE IMD, DIM 100): < 0.035%

Signal-to-Noise

(20 Hz-20 kHz, unweighted, referenced to 40 W into 8Ω):

>93 dB

Cooling:Convection

Design:

Monolithic IC,

 

Conventional Class AB

System Specifications

Input Type:

Balanced Differential

 

(XLR and 1/4" TRS)

 

Unbalanced (RCA)

Input Impedance:

20 kΩ Balanced

 

10 kΩ Unbalanced

Input Protection:

RFI and Level Protected

Maximum Input Level:

+20 dBu

Low Frequency Filter:

80 Hz, 2nd Order, Butterworth

HF Equalization:

Shelving ±2 dB @ 10 kHz

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

Enclosure Alignment:

6th Order

Over Excursion Prevention:

2nd Order High-Pass Filter

Low Line Voltage Shut Down:

60% of Nominal Line

Thermal Protection:

Amplifier Shut-Down, Auto Reset

Muting:

5 seconds at turn-on

Signal Sense Threshold:

–74 dBu (0.155 mV)

Driver Protection:

Independent LF and HF Detection

 

Overall Compression

16

HR624 MK2