Tonestack Kit

Interactive controls allow you to view the frequency response changes in real-time as you manipulate tone control knobs and switches. Long-tap on the chart to see detailed response information.

UP TO 27 REAL-WORLD CLASSIC GUITAR AMPLIFIER TONE CIRCUITS

9 circuits included with the free app:
1959, AB763, Bone Ray, DR103, E-Series, Flex Tilt, James, Tilt & Top Boost

18 additional circuits added with a single in-app purchase:
1974X Normal Channel, 1974X Tremolo Channel, 2555X, 5F2A, 60TC, 6162, 6G6B, 6G7, 6G8, Baxandall, Bridged-T, Bridged-T (Alternate Version), Centurion, James w/ Shift Control, Moonlight, Overdrive Special, Voigt, YGM3

EDIT CIRCUIT COMPONENT VALUES
Edit resistor, capacitor, inductor, voltage source and potentiometer values.
7 potentiometer tapers available.
Convert to standard component values at the touch of a button.
See the effect on frequency response.

LOAD, SAVE & SHARE CIRCUIT EDITS
Save and load edited circuits.
Share frequency response images or export curves as .csv files and import them into a spreadsheet.
Share schematic images or save them to your device.

EXTENSIVE SETTINGS
Editable circuit names
'Dark' and 'Light' themes
Preferred resistor series
'Treble-Middle-Bass' or 'Bass-Middle-Treble' knob order
Chart decibel range
Number of sampled points
Guitar and Bass fundamental frequency highlighting
& More!