66 Flip Bass
Headrush Amplifiers

66 Flip Bass

Inspired by Ampeg Portaflex B15-N

The model 66 Flip Bass It is a compact and versatile amplifier, designed for bass players looking for clarity, definition and punch. Ideal for:

  • Rock, blues, funk and fusion
  • Pedal platform: excellent with overdrive, compression and light modulations
  • Defined sound, with simple and direct control over treble, bass and volume

Perfect for studio, live and recording, with a simple and intuitive structure.

BluesRockHeavy MetalFunkPunkBassFusionProgressives

Controls

Treble

Control the high frequencies:

  • Low → soft and round sound
  • High → bright and punchy sound
  • Ideal for cutting or emphasizing the punch on high notes.
Bass

Control the low frequencies:

  • Bass → tighter and more defined
  • High → fuller and fuller, be careful not to muddy Perfect for controlling depth and sustain of the bass in the mix.
Volume

Controls the preamp level:

  • Low → contained and clean sound
  • High → greater presence and light saturation
  • Interacts with EQ → more volume = more character and dynamics.
Output Level

Final amplifier volume control:

  • Negative → attenuation 0 d
  • B → neutral level
  • Positive → boost of the final signal Does not alter the timbre, only the overall level.

Pro Tips

BEHAVIOR OF THE AMPLIFIER

  • Clear, defined and full-bodied sound
  • Dynamic response to touch and instrument volume
  • Simple controls: treble, bass, volume and output level
  • Ideal for live situations and recordings where clarity is needed

Advice:

  • Treble + Volume → define brilliance and punch
  • Bass → controls sustain and depth
  • Output Level → balances the sound with other blocks/pedals

Final advice:

  • Treble + Volume → modulate brilliance and punch
  • Bass → controls bass depth and sustain
  • Output Level → balances the sound with the effects chain or other amplifiers

Setup Examples

Clean defined

Treble50%
Bass45%
Volume45%
Output Level0dB

Punch rock/funk

Treble55%
Bass50%
Volume55%
Output Level+1 dB

Full-bodied sound for recording

Treble45%
Bass55%
Volume50%
Output Level0dB

Flea – “Funky Punch”

Treble60%
Bass50%
Volume55%
Output Level+1 dB

Description: Aggressive and punchy sound, ideal for slap and funky lines. Defined high frequencies and bass present without muddying, perfect for making the bass stand out in the rhythmic mix.

Geddy Lee – “Progressive Rock”

Treble55%
Bass55%
Volume50%
Output Level0dB

Description: Clear, balanced and incisive sound, suitable for complex melodic lines and progressive parts. Bass present but controlled, with brilliance in the high frequencies to define each note.

John Entwistle – “Rock Thunder”

Treble50%
Bass60%
Volume60%
Output Level+2 dB

Description: Full-bodied and powerful sound, perfect for aggressive rock lines. Deep and sustained bass, with moderate high frequencies to emphasize punch and definition without losing the power of the rhythm section.