CT-BritJH412G12M-58421.wav
Headrush Impulse Responses

CT-BritJH412G12M-58421.wav

Inspired by Marshall® 4x12

Name decoding:

  • CT → Choptones
  • BritJH → cabinet Marshall “JH” (Jimi Hendrix style)
  • 412 → checkout 4x12”
  • G12M → speaker Celestion Greenback (G12M)
  • 58421 → microphone combination:
  • 58 → Shure SM58 (similar to 57 but softer)
  • 421 → Sennheiser MD421 (body, low-mid)

Sound character

This IR is strongly vintage:

  • low soft and round
  • medium warm and musical (Greenback)
  • high beveled
  • dynamic response

Result: authentic, warm and organic vintage rock sound

Perfect for:

  • Hendrix style
  • blues rock
  • classic rock
  • vintage leads
  • old-school recordings

Recommended Parameters

Gain (dB)

IR level

Vintage IR → more dynamic → you can keep it medium

Examples:

  • Clean: -4 dB
  • Blues: -5 dB
  • Rock: -6 dB

Rule: Maintains naturalness and response to touch

HiCut (Hz)

Cuts high frequencies

SM58 + Greenback → already soft

Realistic range:

  • 5 kHz → 6.8 kHz

Examples:

  • Clean: 5.5 kHz
  • Blues: 6 kHz
  • Rock: 6–6.5 kHz

Rule: DO NOT overdo it → you lose air

LoCut (Hz)

Cuts low frequencies

Greenback → less tight bass

Realistic range:

  • 80Hz → 110Hz

Examples:

  • Clean: 80 Hz
  • Blues: 90 Hz
  • Rock: 95–105 Hz

Rule: Check the “low-end vintage”

Mix (%)

Blend IR / dry

Standard:

  • 100%

Creative:

  • 80–90% for ambient

Pro Tips

Great starting point:

  • Gain: -5 dB
  • HiCut: 6–6.3 kHz
  • LoCut: 90–100 Hz
  • Mixes: 100%

This IR is perfect for:

sounds “amp in the room” dynamic right hand single coil pickups

CT-BritJH412G12M-58421 is perfect:

for blues and classic rock for authentic vintage sounds with Marshall Plexi amp for old-school recordings

Setup Examples

Hendrix / blues rock

Gain-5 dB
HiCut6 kHz
LoCut90 Hz
Mixes100%

Sound:

  • warm, dynamic, vintage

Clean vintage

Gain-4 dB
HiCut5.5 kHz
LoCut80 Hz
Mixes100%

Sound:

  • soft, natural

Classic rock

Gain-6 dB
HiCut6.3 kHz
LoCut100 Hz
Mixes100%

Sound:

  • punchy but hot

Vintage leads

Gain-5 dB
HiCut6 kHz
LoCut95 Hz
Mixes100%

Sound:

  • fluid, musical