
Headrush Amplifiers
89 SL-100 Drive
Inspired by Soldano SLO-100 (Drive)
The model 89 SL-100 Drive it is designed to deliver controlled and defined distortion, ideal for rock, hard rock and saturated leads:
- Modular drive to go from light crunch to full distortion
- Comprehensive EQ controls to define body, brilliance and presence
- Adjustable preamp to shape saturation and dynamics
- Master Volume and Output Level to control pressure and boost
Perfect for humbucker or single coil guitars that need sustain and definition.
BluesRockHard RockHeavy MetalBass
Controls
Mod
Activate enhanced
Drive mode:
- Y → drive mode active, strong saturation
- N → clean mode / light crunch
Treble
Control the high frequencies:
- Low → soft sound
- High → bright and cutting
Middle
Controls the mid frequencies:
- Low → natural scoop
- High → more body and presence Fundamental to stand out in the mix and maintain definition
Bass
Control the low frequencies:
- Low → tight and controlled
- High → full and powerful
Presence
Controls the final brilliance:
- Low → soft sound
- High → sharper and more open Affects definition and “air” of the sound
Preamp
Controls the preamp level:
- Low → light crunch
- High → full and sustained distortion Interacts with Master Volume to modulate dynamics and sustain
Master Volume
Controls the overall volume of the amplifier:
- Low → controlled sound
- High → more boost Allows you to adjust feel and pressure without altering the timbre
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 light crunch to full distortion
- Modular EQ for body and shine
- Modular preamp → complete control of gain and saturation
- Master Volume and Output Level allow precise thrust adjustment
Advice:
- Mod ON + High Treble → punchy lead sound
- Middle medium-high → maintains body and definition
- Controlled bass → avoids muddying with high drive
- Preamp + Master Volume → modulate sustain and compression without altering timbre
Final advice:
- Mod ON + Treble alto → punchy lead
- High Preamp + Master Moderate Volume → full controlled distortion
- Middle and Presence → balance body and shine
Setup Examples
Crunch rock / powerful rhythm
ModN
Treble55%
Middle55%
Bass50%
Presence55%
Preamp55%
Master Vol60%
Output Level0dB
Distorted lead / defined solo
ModY
Treble65%
Middle55%
Bass50%
Presence60%
Preamp65%
Master Vol65%
Output Level+1 dB
Hard rock / full distortion
ModY
Treble70%
Middle50%
Bass55%
Presence65%
Preamp70%
Master Vol70%
Output Level+2 dB

