HR824mk2 and HR624mk2 high-resolution Active studio reference monitors represent the evolution of revolutionary thinking. Mackie engineers, joined by audio gurus from EAW, worked hard to conceive of a way to preserve the all-important character of the original HR, while delivering performance‐as well as appearance‐that’s better than ever. And even moreso than the original HR824 and HR624, which were designed apart from each other, the HR824mk2 and HR624mk2 are part of the same family, true siblings in design and sound. Sharing the same engineering, they are created to work together, whether in surround systems, or as part of complementary monitoring setups in different sized rooms.
The new one-piece cast aluminum Zero Edge Baffle™ features precisely engineered curvature that minimizes diffraction for a crystal clear image of your mix, and effectively controls sound waves so you get detailed lows, full, articulate mids, and shimmering highs. The integrated Optimized Waveguide accurately and efficiently controls dispersion characteristics of the sound on and off axis, resulting in a wide sweet spot with smooth transitions from lows to highs. More inert than a wood or plastic baffle, the Zero Edge Baffle’s cast metal surface reduces surface vibrations during playback, thereby minimizing distortion to the sound’s waveforms; the result is improved time-domain characteristics, which equates to dramatically enhanced depth of field.
The HRmk2 is a bass reflex 6th-order system. Rather than use ports, the vent takes the form of a passive radiator, a mass-loaded flat piston coupled to the air trapped within the enclosure. You can’t see the passive radiator because it is located at the rear of the cabinet, behind the power amplifier assembly.
One primary advantage of a passive radiator is that it can reproduce low frequencies with lower distortion and at a higher sound pressure level (SPL) than a simple port or duct. Our unique passive radiator design uses a flat diaphragm, providing exceptional stiffness to the radiating surface. The elliptical shape of the passive radiator takes up nearly the entire surface area available on the rear of the enclosure, allowing the passive radiator to move more air than a port. And as a result of this design, our HRmk2s deliver superior bass response, with virtually no distortion.
The HRmk2 Series monitors are a true Active design, meaning they contain separate onboard amplifiers for each driver, plus onboard active crossovers and time-correction circuitry, which helps ensure highs and lows reach your ears at the same time. The HRmk2s also have protection circuitry built in to protect from damaging input levels. With the same class A/B amplifier design as the original HR Series, the HRmk2s retain the much-loved character of our classic monitor, and carry on the Acoustic Space circuitry of the classic HRs, which allows you to tune the monitors to your room.
Each HRmk2 monitor features a high-precision, low-distortion woofer—8.75-inch for the HR824mk2 and 6.7-inch for the HR624mk2—and a 1-inch ferrofluid cooled titanium dome tweeter. An exhaustive process, the selection of the new HRmk2 drivers consumed considerable engineering resources. Our team spent countless hours in their quest to find drivers that met our stringent criteria, including the ability to be manufactured in volume with virtually no variability between units, the ability to produce the desired frequency response, and the ability to meet the tight price goals that allow us to make our monitors affordable. After having rejected multiple candidates, the team eventually narrowed down the field. With further engineering input, we sourced drivers that met our standards, and successfully managed to fine-tune a system that delivers unparalleled results.
The HRmk2 monitors feature a wood cabinet, with custom internal bracing to increase it