An amp head, from schematic up.
Personal build
A guitar amplifier designed in KiCad and checked in SPICE, now being built into a custom clear enclosure so the circuit stays visible.
Input1/4" jack
PreampTL072 op-amp
Tone stackBass, mid, treble
Power ampTDA2040
Speakercab out
Shape the tone
The classic Fender tone stack is passive: its three knobs only ever cut, and they interact. This is its real frequency response, computed from the circuit values.
Bass 5.0
Mid 5.0
Treble 5.0
Drag a knob up or down, or use the arrow keys. Dashed line: all knobs at 5. Component values from the 1959 Bassman.
Design
TL072 preamp for gain and buffering, a Fender-style tone stack, and a TDA2040 power stage, laid out in KiCad.
Validation
SPICE simulation of gain and frequency response before committing to hardware.