Uploaded May 2022 | Updated September 2026, 3 weeks ago

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Lets take a look at the differences between the MD421 vs MD421 II. There are vast differences and in many ways, not the same mic. Different capsule, different housing, different tuning methods, different everything except the look.

00:00 Intro
00:05 2 main versions
00:29 Fixing mics to pay the bills
02:00 Broken MD421's
02:50 Compare the external differences
04:38 Ports vs no ports
04:52 How to open the mics
07:28 Removing the capsule
08:58 Comparing the housings
09:31 Internal ports and tuning
10:04 Removing the grills
13:08 Humbucking coils
14:31 Rear capsule vents
15:33 The mystery gear
16:05 Diaphragm and phase cover
18:12 Wiring
18:57 Bass roll off filter
20:15 Outro

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