Quote:
Originally Posted by
nms
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The A21 are a ported 2-way with no EQs, low end is 6db down at 38hz and amp power is 120w +50w. The SM9 an unported 3 way with all the EQ options you could want, 400w+100w+100w amp power and only 1db down at 40hz. Those are some very different monitors.
The SM9 maybe 'unported' in a literal sense, but a ported monitor and a passive radiator monitor are BOTH acoustic resonator designs, so they both share very similar traits (vs a sealed design).