Gearank

Mackie takes a different approach to handling low frequencies with the HR624mk2. Instead of a bass port, the HR series uses a Passive Radiator; a type of bass response mechanism that uses a larger diaphragm that resonates with the speaker.

Compared to typical bass reflex systems that utilize tuned ports, passive radiators can use larger diaphragms and therefore extend the low frequencies lower than a port in the same size enclosure.

The 6.7" woofer along with a 1" Dome Tweeter is placed on a specially designed baffle to minimize errant reflections.

Tech Specs

• Driver: 6.7" Woofer, 1" Dome Tweeter
• Amplifier: 60W LF, 35W HF
• Inputs: 1 x XLR, 1 x 1/4" (TS)
• Frequency Response: 49Hz-20kHz (±1.5 dB)
• Crossover Frequency: 3kHz, 24 dB/octave
• Enclosure: Sealed with Passive Radiator
• Controls: Acoustic Space Control, LF roll-off, HF shelf controls
• Dimensions: 13.1" x 8.6" x 12.6"
• Weight: 23.4 lbs.

Pros

The Mackie HR624mk2 gets praise for its low frequency extension beyond what monitors of these size are usually capable of. This is thanks to the Passive Radiator design versus the bass reflex port designs of many studio monitors. The sealed design also was noted to provide more accurate bass response in sub-optimal rooms. The monitor's room acoustics settings also gets praise for versatility.

Cons

Some expert reviewers noted that the passive radiator design extends low frequencies, but also resonates a bit too long when tested for waterfall plots (vibration over time).

Overall

The Mackie HR624mk2 is a great sounding studio monitor with great bass extension and great tweakability for different types off rooms.

Although this was previously on our recommended list, there are now more highly rated options available which you can see in our guide to The Best Studio Monitors.