
Headrush Amplifiers
69 Plexiglas 100W
Inspired by Marshall Super Lead Plexi 100W
The model 69 Plexiglas 100W is an amplifier inspired by legendary 100 watt Plexi, designed to offer:
- Powerful, open and highly dynamic sound
- High headroom with great touch response
- Ideal for classic rock, hard rock and blues
Compared to the 50W version, it offers more headroom, firmer bass and more punch, perfect for big, defined sounds.
BluesRockHard RockJazzFunkPopBassClassic Rock
Controls
Treble
Controls the high frequencies:
- Low → soft sound
- High → bright and punchy Fundamental for defining attack and presence
Middle
Control the mid frequencies:
- Low → scooped sound
- High → more body and presence
- Key to standing out in the mix
Bass
Control the low frequencies:
- Low → tight and controlled
- High → full and deep In the 100W Plexi the lows are more important and present
Presence
Controls the final brilliance:
- Low → soft sound
- High → more open and defined Adds air and aggression
High Volume
Controls the level of the
High channel:
- Low → clean
- High → crunch and overdrive Main source of saturation
Normal Volume
Controls the level of the
Normal channel:
- Low → clean
- High → adds body and warmth Used in conjunction with the High channel to “jump” the sound
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
- Big, open and very dynamic sound
- More headroom than the 50W
- Excellent response to guitar volume
- High Vol + Normal Vol → blend between shine and body
Advice:
- High Vol → crunch and attack
- Normal Vol → adds thickness
- Presence + Treble → definition and aggression
- Bass → be careful not to overdo it
Final advice:
- High Vol + Treble → define the Plexi character
- Normal Vol → adds body and roundness
- Presence → makes the sound more “open” and aggressive
- Perfect for classic rock, hard rock and powerful leads
Setup Examples
Powerful clean / high headroom
Treble50%
Middle45%
Bass45%
Presence50%
High Vol35%
Normal Vol40%
Output Level0dB
Classic rock crunch
Treble55%
Middle50%
Bass50%
Presence55%
High Vol55%
Normal Vol50%
Output Level+1 dB
Powerful lead / hard rock
Treble60%
Middle55%
Bass50%
Presence60%
High Vol70%
Normal Vol55%
Output Level+2 dB

