Mackie HR624 Mk1 Studio Monitors – Great Sound, Honest Condition
These great sounding speakers are the MK1 which were still housed in wood instead of the plastic the current models use. Comes with 2X 5m blue Profigold RCA cables.
Solid, accurate, and still punching well above their weight—the Mackie HR624 Mk1 active studio monitors remain a favorite for mixing, tracking, and critical listening. These are the real deal: bi-amped, time-aligned, with that signature High Resolution waveguide and titanium-dome tweeter that delivers a wide, stable sweet spot and honest, uncolored sound.
Both units are fully functional—clean power-on, no buzzes, no distortion, and all acoustic space controls working as they should. Cosmetically, they show light wear consistent with studio use. Note: the MDF veneer on one unit has lifted slightly on the top edge edge—a super common issue with these monitors due to age, as you’ll see in the photos. It doesn’t affect performance in any way, and the cabinet remains structurally solid.
If you’re after reliable nearfields for a home or project studio—without the hype or the markup—these are a low-key, high-value pick. Tested, loved, and ready to go.
No fluff. Just clear sound and honest gear.Used Mackie HR624 THX studio monitors.
SPECS:
Audio
Frequency Response 52 Hz-20 kHz (±1.5 dB)
High-Frequency Equalization ±2 dB shelving @ 10 kHz
Low-Frequency Equalization 80 Hz/49 Hz second-order Butterworth, switchable
Acoustic Space EQ 3-position switch: -4 dB or -2 dB @ 400 Hz (and below) or flat
Peak Output 112 dB @ 1m
Residual Noise < 8 dB @ 1m
Amplifiers
Power Rating (@ 1 kHz with 1% THD) 40W (HF amplifier); 100W (LF amplifier)
Signal-to-Noise Ratio > 93 dB unweighted (HF); > 101 dB unweighted (LF)
Input Impedance 20 kž balanced; 10 kž unbalanced
Total Harmonic Distortion < 0.035%
Power Consumption 12W standby; 20W idle; 105W loud program
Speakers
High-Frequency Driver 1" aluminum dome
Low-Frequency Driver 6.7" mineral-filled polypropylene cone
Input Connectors XLR; ¼" TRS; RCA
Crossover
Crossover Slope 24 dB/octave @ 3 kHz, active
Enclosure
Material 0.625" MDF with 1.000" MDF front panel
Dimensions 8.25" (W) × 13.00" (H) × 12.50" (D)
Weight 25 lb.
Connectors XLR; ¼" TRS; RCA CROSSOVER Crossover Slope 24 dB/octave @ 3 kHz, active
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