
Headrush Amplifiers
99 PV51 II Crunch
Inspired by Peavey 5150 II (Crunch)
The model 99 PV51 II Crunch it is designed to deliver modern, defined and powerful crunch, ideal for:
- Modern rock, hard rock and hardcore blues
- Incisive rhythms and dynamic leads
- Tight sounds with great low end control
Compared to the Clean version, here you have more gain, more punch and greater aggression, while maintaining definition.
BluesRockHard RockHeavy MetalJazzFunkPopCountryBass
Controls
Bright
Activate the high frequency boost:
- Y → more attack and definition
- N → warmer and fuller sound
- Useful for cutting through the mix
High
Control the high frequencies:
- Low → smooth sound
- High → bright and punchy
Mid
Controls the mid frequencies:
- Low → scooped sound
- High → more body and presence Fundamental for rhythms and leads
Low
Control the low frequencies:
- Low → tight and controlled
- High → fuller and more powerful
Presence
Controls the final brilliance:
- Low → smooth sound
- High → more aggressive and open Adds “air” and definition
Pre Gain
Control the preamp gain:
- Low → light crunch
- High → full crunch / distortion
- It's the heart of saturation
Resonance
Controls the low frequency response of the power amp:
- Low → tighter lows
- High → deeper lows and “thump” Very important for modern riffs
Post
Controls the volume of the final (master):
- Low → less push
- High → more body and pressure Affects the general feel
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
- Modern, defined and powerful crunch
- Excellent bass control (thanks to Resonance)
- Modular gain → from crunch to distortion
- Dynamic and aggressive response
Advice:
- Pre Gain high → more saturation
- Resonance → adjusts the “weight” of the sound
- Mid → avoids disappearing into the mix
- Presence + High → definition and attack
Final advice:
- Pre Gain + Resonance → define the modern character
- Medium-high mid → essential for live mixes
- Presence + High → attack and definition
- Perfect for modern rock and hard rock
Setup Examples
Modern rock crunch
BrightY
High60%
Mid55%
Low50%
Presence60%
Pre Gain60%
Resonance50%
Posts65%
Output Level0dB
Hard rock / powerful riff
BrightY
High65%
Mid55%
Low55%
Presence65%
Pre Gain70%
Resonance60%
Posts70%
Output Level+1 dB
Lead crunch / driven solo
BrightY
High65%
Mid60%
Low50%
Presence65%
Pre Gain75%
Resonance55%
Posts70%
Output Level+2 dB

