HR624 MK2 High Resolution Active Studio Monitor OW N ER’ S M A N UA L
HR624 MK2 IMPORTANT SAFETY INSTRUCTIONS 1. Read these instructions. 13. Unplug this apparatus during lightning storms or when unused for long periods of time. 2. Keep these instructions. 3. Heed all warnings. 4. Follow all instructions. 5. Do not use this apparatus near water. 6. Clean only with dry cloth. Use a non-scratch cloth to protect the finish. 7. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions. 8.
Thank you for choosing the Mackie HR624 MK2 Studio Monitors. We began producing the original HR624 Studio Monitors in 2001, the baby brother to our flagship HR824 Studio Monitors. The HR624 MK2s have been redesigned with modern components for improved accuracy and an extended low-frequency response. • The amplifiers are designed to provide maximum acoustic output from the speakers, yet minimize the danger of speaker damage due to overdriving.
HR624 MK2 The Cabinet... The cabinet is made of MDF with a high-gloss pianoblack finish. Internal bracing increases the strength and rigidity (stiffness) of the box. An open-cell adiabatic foam material fills the inside of the box to absorb internal reflections and dampen standing waves. Mounting hardware is installed on the bottom of the cabinet that fits the WB-60 OmniMount wall-mount bracket. Power Amplifiers...
Owner’s Manual QUARTER SPACE HALF SPACE CONSOLE CONSOLE SPEAKERS IN CORNERS SPEAKERS AGAINST WALL SPEAKERS AWAY FROM WALLS B C WHOLE SPACE CONSOLE A ACOUSTIC SPACE APPLICATIONS 49Hz 10kHz 0dB LOW CUT 0dB + 2dB –2dB –4dB –3dB 80Hz 0dB – 2dB 20 LOW FREQ 100Hz ACOUSTIC SPACE HIGH FREQ WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. DO NOT REMOVE COVER. NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL.
HR624 MK2 Feel free to experiment. Placement In many respects, every room is unique in terms of its acoustics. The HR624 MK2s were designed to be placed in a vertical position. If you find it necessary to place the speakers in a horizontal position (on their sides), place them so that the woofers are toward the inside; that is, so the woofers are closest to each other. This provides the best low-frequency summing and overall imaging.
Contents Nearly two decades ago, George Lucas turned a passion for great sound into the world’s most accepted and trusted solution for achieving it. The standard was named THX (for Tomlinson Holman, who developed the THX Sound System when he was the research and technical director at Lucasfilm Ltd.™ in the early 80s), and today, with hundreds of thousands of home theater customers and more than 3000 THX Certified movie theaters enjoying its benefits, the THX name has become nothing short of legendary.
HR624 MK2 REAR PANEL DESCRIPTION This is where you connect your signal to the monitor, and make adjustments to the frequency response of the speakers to match the monitor’s location and your room’s environment. 2. INPUT SENSITIVITY –10dB For THX applications, the rear panel switches and controls should be set to the THX positions as indicated in this section.
NORMAL INPUT SENSITIVITY 4. LOW FREQ FILTER QUARTER WHOLE (NORMAL) A C B HALF ACOUSTIC SPACE –2dB 80Hz 49Hz LOW CUT (NORMAL) +2dB 0 (NORMAL) LOW FREQ FILTER HIGH FREQ FILTER THX = 80Hz–10dB Removing the low-frequency content also allows you to raise the overall output level somewhat. Lowfrequency information requires the largest amount of an amplifier’s output, so restricting the low-frequency allows raising the mid-frequency level STANDBY content ON AUTO somewhat.
HR624 MK2 Conversely, if your mixes are consistently too bright, QUARTER WHOLE (NORMAL) –10dB then adding some additional high-frequency energy in A C the monitors satisfies your ears, and the resultant mix has less HF content. OFF NORMAL 80Hz 49Hz –2dB 0 +2dB STANDBY ON B The timbre of your monitors affects (NORMAL) LOW CUT (NORMAL) AUTO HALF ON the way that your mixes play on other INPUT ACOUSTIC LOW HIGH POWER equipment.
8. Passive Radiator When you mount a loudspeaker in a box, there are two things that you can do with the radiation from the rear of the cone: use it to enhance the low‑frequency performance of the speaker system (bass reflex system) or soak it up (acoustic suspension system). • A bass reflex system uses the rear radiation to extend the low-frequency response. Most systems provide holes (ports) in the front or back of the cabinet to release the rear wave. Sometimes the holes have tubes (ducts) in them.
HR624 MK2 FRONT PANEL DESCRIPTION 9. Power Switch QUARTER 10dB switch Use –this to turnWHOLE on or(NORMAL) off the HR624 MK2 from A C the front. It works with the POWER MODE [6] switch on the rear panel in the following way: +2dB 0 OFF 80Hzpanel is 49Hz • If theNORMAL POWER MODE Bswitch on the rear set –2dB (NORMAL) LOW CUT (NORMAL) HALF to STANDBY, the front panel power [9] switch has no INPUTThe powerACOUSTIC HIGH effect. [10] ring remains off.
All amplifiers produce heat. The HR624 MK2 is designed to be efficient both electrically and thermally. • If for some reason the heatsinks get too hot, a thermal switch activates, placing the HR624 MK2 into Standby mode (indicated when the power ring [10] turns off). • Should this happen, make sure that airflow to the rear of the cabinet is not restricted. • When the heatsinks cool down to a safe temperature, the switch r esets and normal operation resumes.
HR624 MK2 SERVICE INFO If you think your Mackie product has a problem, please check out the following troubleshooting tips and do your best to confirm the problem. Visit the Support section of our website (www.mackie.com/support) where you will find lots of useful information such as FAQs, and documentation. You may find the answer to the problem without having to send your Mackie product away.
Owner’s Manual Repair For warranty service, please refer to the warranty information on page 19. Non-warranty service for Mackie products is available at a factory-authorized service center. To locate your nearest service center, visit www.mackie.com, click “Support” and select “Locate a Service Center.” If you do not have access to our website, please call our Tech Support department at 1-800-898-3211 (normal business hours, Pacific Time), to explain the problem.
HR624 MK2 TECHNICAL INFORMATION HR624 MK2 Specifications Enclosure Amplifier Section Materials and Construction: 3⁄4-inch (19 mm) thick MDF cabinet construction with internal bracing to add to cabinet stiffness. 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.
Owner’s Manual Graphs Acoustic Section HR624 Acoustic Space Filter Response +10 Free-Field Frequency Response: ±1.5 dB, 49 Hz to 20 kHz Lower cutoff frequency: –3 dB @ 45 Hz Upper cutoff frequency: –3 dB @ 22 kHz +9 +8 +7 +6 +5 +4 +3 Sound Pressure Level at 1 meter, –7.5 dBu into balanced input: 100 dB SPL @ 1m Maximum peak SPL per pair: 115 dB SPL @ 1m Maximum short term SPL on axis, half space 80 Hz to 2.
HR624 MK2 HR624 MK2 Block Diagram +15VDC POWER MODE SWITCH ON AUTO STANDBY Vref SIGNAL SENSE MUTE ON/OFF CONTROL HIGH = MUTE OFF LOW = MUTE ON MUTE THERMAL SWITCH LOW AC VOLTS SENSE POWER RING (POWER = WHITE OVERLOAD = RED) POWER SWITCH (FRONT PANEL) HF OUT UNBALANCED LINE INPUT 1 BALANCED LINE INPUTS HF TRANSDUCER THERMAL MODELER HI-FREQUENCY POWER AMPLIFIER HIGH FREQ.
Please keep your sales receipt in a safe place. This Limited Product Warranty (“Product Warranty”) is provided by LOUD Technologies Inc. (“LOUD”) and is applicable to products purchased in the United States or Canada through a LOUD-authorized reseller or dealer. The Product Warranty will not extend to anyone other than the original purchaser of the product (hereinafter, “Customer,” “you” or “your”). For products purchased outside the U.S. or Canada, please visit www.mackie.
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