MD421 (M)
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