89 SL-100 Ext Range
Headrush Amplifiers

89 SL-100 Ext Range

Inspired by Soldano SLO-100 (Extreme)

The model 89 SL-100 Ext Range it is designed to deliver a broad tonal spectrum, from brilliant clean to controlled crunch/distortion, with integrated tremolo:

  • Full control of EQ, gain and tremolo
  • Defined and dynamic sound, perfect for rock, blues and fusion
  • Master Volume and Output Level to adjust pressure and thrust
  • Ideal for humbucker and single coil guitars

“Ext Range” emphasizes tonal versatility, allowing you to range between clean, crunch and defined leads.

BluesRockHard RockHeavy MetalJazzFunkPopCountryBassFusion

Controls

Sync

Synchronizes the tremolo speed to the preset tempo:

  • Y → tremolo synchronized to
  • BPMN → free tremolo, adjusted in Hz
Bright

Activate the high frequency boost:

  • Y → brighter and punchier sound
  • N → softer and fuller sound
Treble

Control the high frequencies:

  • Low → soft sound
  • High → bright and cutting
Middle

Control the mid frequencies:

  • Low → natural scoop
  • High → more body and presence
Bass

Control the low frequencies:

  • Low → tight and controlled
  • High → full and powerful
Presence

Control the final brilliance:

  • Low → soft sound
  • High → sharper and more open
Gain

Controls overall saturation:

  • Low → light crunch
  • High → full distortion Interacts with Master Volume to modulate sustain and compression
Speed

Tremolo speed (cycles per second):

  • 0.5–1 Hz → slow and smooth
  • 1–3 Hz → classic
  • 3–6 Hz → fast and rhythmic
  • If
  • Sync
  • ON → Speed ​​automatically adapts to the preset tempo
Depth

Tremolo depth:

  • Low → light effect
  • High → strong and pulsating tremolo
Master Volume

Controls the overall volume of the amplifier:

  • Low → controlled sound
  • High → more punch
Tremolo

Activate the tremolo effect:

  • Y → tremolo active
  • N → tremolo bypassed
Output Level

Controls the final volume:

  • Negative → attenuation 0 d
  • B → neutral
  • Positive → boost Does not alter the timbre

Pro Tips

BEHAVIOR OF THE AMPLIFIER

  • Defined and dynamic sound, from extreme clean to controlled crunch/distortion
  • Modular EQ for body, brilliance and presence
  • Adjustable tremolo for vintage or modern effect
  • Modular gain to go from crunch to full distortion

Advice:

  • Bright + Treble high → sharp sound for lead
  • Middle medium-high → maintains body and presence
  • Controlled bass → avoids muddying with high gain
  • Speed ​​and Depth → modulate the tremolo without altering the timbre

Final advice:

  • High Gain + Treble/Presence → punchy lead sound
  • Medium tremolo + moderate Speed ​​→ controlled vintage effect
  • Master Vol + Output Level → adjust pressure without altering the tone

Setup Examples

Clean ambient / light tremolo

SyncY
BrightY
Treble55%
Middle50%
Bass50%
Presence55%
Gain40%
Speed1 Hz
Depth25%
Master Vol60%
TremoloY
Output Level0dB

Moderate rhythmic crunch/tremolo

SyncN
BrightN
Treble60%
Middle55%
Bass50%
Presence60%
Gain65%
Speed2 Hz
Depth35%
Master Vol65%
TremoloY
Output Level+1 dB

Distorted lead / marked tremolo

SyncY
BrightY
Treble65%
Middle55%
Bass55%
Presence65%
Gain80%
Speed3 Hz
Depth50%
Master Vol70%
TremoloY
Output Level+2 dB

Tom Morello – “Aggressive Clean / Tremolo”

SyncY
BrightY
Treble65%
Middle50%
Bass55%
Presence60%
Gain45%
Speed2 Hz
Depth40%
Master Vol65%
TremoloY
Output Level+1 dB

Description: Bright clean with strong tremolo, perfect for Rage Against The Machine-style rhythmic effects and dynamic staccatos.

David Gilmour – “Ambient / Smooth Lead”

SyncN
BrightY
Treble60%
Middle55%
Bass50%
Presence60%
Gain50%
Speed1 Hz
Depth30%
Master Vol65%
TremoloY
Output Level+1 dB

Description: Warm and full-bodied clean with delicate tremolo, ideal for arpeggios, delays and Pink Floyd-style ethereal atmospheres.

Steve Morse – “Crunchy Lead / Dynamic Rhythm”

SyncY
BrightY
Treble65%
Middle55%
Bass55%
Presence65%
Gain70%
Speed2.5 Hz
Depth45%
Master Vol70%
TremoloY
Output Level+2 dB

Description: Dynamic crunch with controlled tremolo, perfect for articulate leads, complex phrasing and rock fusion rhythms.

Quick Tips:

  • Tom Morello → strong tremolo + bright clean → perfect for rhythmic breaks and effects
  • David Gilmour → delicate tremolo + moderate gain → full-bodied clean and atmospheric lead
  • Steve Morse → high gain + medium tremolo → defined and dynamic crunch for leads and complex rhythms