Headrush Cabinets

1X15 OPEN BACK

Inspired by Ampeg® Reverberocket (Jensen C15N)

1x15" Speaker

The 1x15 Open Back it is a cabinet characterized by:

Sound large, warm and very natural
Deep but not “boxy” bass
Great dispersion thanks to the open back design
Ideal for clean, blues, jazz and even light bass

Controls

Axis (Y/N)

Microphone position:

Y (On-axis) -> brighter and more direct
N (Off-axis) -> softer and more ambient

Off-axis enhances the open back character

Breakup (%)

Simulate cone saturation:

Bass -> wide and natural clean
Medium -> warmth and light compression
High -> More noticeable vintage breakup

On this cab the breakup is very musical and smooth

Out Gain (dB)

Check the output volume:

Negative -> attenuation
0 dB -> neutral
Positive -> boost

Amp Gain (dB)

Check the input level:

Negative -> less thrust
0 dB -> neutral
Positive -> more dynamics and response

It greatly influences the "breath" of the cab

Suggested Microphones

Dyn 7: modern dynamic, balanced
Dyn 57: strong attack, rock presence
Dyn 409: softer and less aggressive
Dyn 421: more body and lower
Cond 67: warm and vintage
Cond 87: hi-fi and detailed
Cond 414: versatile and balanced
Ribbon 121: dark, soft and natural

Pro Tips

CABINET BEHAVIOR

Wide and open sound
Deep but natural bass
Great “in room” feeling
Sweet and musical breakup
Advice:
Ribbon / Cond → maximum realism
Medium breakup → sweet spot
Off-axis → more natural
Dyn421 → more bass punch

Advice

Ribbon / Cond → maximum realism
Medium breakup → sweet spot
Off-axis → more natural
Dyn421 → more bass punch

Final advice

Breakup 20–40% → natural sweet spot
Ribbon + Off-axis → huge and warm sound

Setup Examples

Clean / jazzy

MicTypeCond 67

AxisN

Breakups15–20%

Amp Gain0dB

Out Gain0dB

Warm/dynamic blues

MicTypeRibbon 121

AxisN

Breakup30–35%

Amp Gain+1 dB

Out Gain0dB

Soft/vintage crunch

Mic TypeDyn421

AxisY

Breakup40–45%

Amp Gain+1 dB

Out Gain+1 dB