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Flathill 412 Angled (BR)
ReValver Cabinets

Flathill 412 Angled (BR)

Inspired by Mesa Boogie® 4x12 Angled (Bottom-Right
4x12" Speaker

It is a 4x12 angled “British” cab (Marshall type) It is NOT a “Room” cab, therefore:

  • has no integrated real environment (like Doc's Best Room) → the “Ambience” here is simulated/artificial, not a realistic second mic room

Controls

Gain (dB)

Mic volume

  • ↑ = more output
  • ↓ = more headroom

It does NOT change the character, only the level

Mic Dist (inch)

Mic-speaker distance.

  • 0–1” → tight, aggressive (metal)
  • 2–4” → balanced
  • >5” → more air, less attack

on 4x12 it is CRITICAL:

too close = harsh

too far = loses punch

Mic Axis (On/Off)
  • ON (on-axis) → center cone → highest, attack
  • OFF (off-axis) → cone edge → darker
  • on this cab -> ON = modern metal OFF = rock / vintage
Low (dB)
  • negative → tight palm mute
  • positive → more “thump”

typical:

  • metal → -2 / -4
  • rock → 0 / +2
High (dB)
  • negative → less harsh
  • positive → more presence

very important on 4x12:

SM57 often requires -1/-3 dB

Delay (ms)

Signal delay.

  • Real use -> simulate double mic, correct phase
  • 0 ms → standard
  • 1–5 ms → slight gap
  • 5 ms → comb effect
Ambience (Y/N)
  • OFF → pure cab close mic
  • ON → adds synthetic room
Amb Level (dB)

How much environment do you add.

  • low → natural
  • high → live effect
Amb Size (ms)

Simulated room size.

  • 10–30 ms → small room
  • 30–80 ms → study
  • 80–150+ ms → hall

It's NOT as realistic as cab Room - it's more like early reflections + short reverb

Suggested Microphones

  • SM57 → Marshall standard, aggressive mid
  • MD421 (all variations) → more body and low-end
  • SM7 (variants) → smoother, less harsh
  • Rezio → modern, more hi-fi than 57

BEST MATCH on this cab: SM57 SM57 + MD421 (if layer) SM7 for lead

on this cab: perfect for removing harsh, ideal for classic rock

use:

clean on distorted cab

or blending

Setup Examples

MODERN METAL

MicSM57
Dist1”
AxisON
Low-3
High-2
AmbOFF

tight and mix-ready

CLASSIC ROCK

MicR121 / MD421
Dist2–3”
AxisOFF
Low+1
High-1
Amblight

LEAD / SOLO

MicSM7
Dist2”
AxisOFF
High+1
AmbON (light)