
ReValver Microphones
MD421 (M)
Inspired by Sennheiser® MD421 (Bass Roll-Off Switch M)
Model: Sennheiser MD 421
acronym:
- M = Mid emphasis (focus on the mids) is not just a filter, it's a different voicing
WHAT MAKES IT DIFFERENT
compared to the LC versions:
- less lows, less subs, more mids, more presence in the mix
SOUND CHARACTER
- low reduced
- medium very prominent
- high present but not harsh
- answer very focused
in practice: it cuts much less natural “in your face” into the mix
TIMBRIC PERSONALITY
it's a mic:
- mid-forward
- aggressive
- defined
- Very mix-ready
perfect for: rhythmic rock punk metal
rockpunkrhythmic
Controls
Axis Interaction
- ON-axis → maximum attack
- OFF-axis → softer
here: ON almost always
Gain (dB)
- volume only
Mic Distance (inch)
- Distance 0–1”: very aggressive
- Distance 1–2”: punch
- Distance 2–3”: balance
- Distance >3”: more natural
Low (dB)
bass already reduced
use:
- 0 → perfect
- cutting is rarely necessary
High (dB)
use:
- 0 → natural
- +1 → more presence
Delay (ms)
useful for: depth combinations
Ambience (Y/N)
often OFF ON just for naturalness
Pro Tips
QUICK SUMMARY
- type: dynamic
- character: mid-forward
- strength: presence in the mix
- limit: less natural
ON DARK CAB (PPC, Orange)
PERFECT brings out the mids
ON MODERN CABs (VHIII, 6505)
very defined, perfect for rhythms
ON VINTAGE CAB
more aggressive less “vintage”
ON HI-FI CAB (TVX, SW Giant)
helpful adds character
PRO
cuts into the mix very defined perfect for very effective live-style rhythms
AGAINST
less natural the less body can be “nasal”
Setup Examples
AGGRESSIVE ROCK (TOP)
Dist1”
AxisON
Low0
High0
- cuts into the mix
PUNK / GARAGE
Dist1–2”
AxisON
High+1
METAL RHYTHM
Dist0.5–1”
AxisON
Low0
High+1
MIX FIX (cab too dark)
Dist1”
AxisON
- bring out the mids

