Bool Audio
Tools
Free calculators and reference data for turntable setup. We built them around the Clear Wave, but they work for any arm. No account, nothing to install, and every result has a link you can share.
Calculators
Resonance calculator
Pick your tonearm and cartridge from the database, or type the figures in, and see where the pairing resonates against the 8–12 Hz target band.
Open →Compliance converter
Makers publish compliance at 10 Hz, at 100 Hz or statically, and rarely make it obvious which. Convert a published figure to the 10 Hz number a resonance calculation needs.
Open →Loading calculator
Moving-magnet cartridges care about capacitance. Add up your tonearm cable and phono stage, and check the total against the maker's recommended window.
Open →Alignment calculator
Pick your arm or enter its geometry, then plot the tracking error across the record, find its null points, and see what Baerwald, Löfgren B and Stevenson would ask of it.
Open →VTA & arm height
Millimetres at the pillar become fractions of a degree at the stylus. Convert between the two, in either direction, for an arm from the database or any effective length you know.
Open →Reference
Tonearm register
Effective mass and mounting geometry per tonearm, each figure with its source. Effective mass is what a resonance calculation needs and the hardest number to find — most arms never publish one.
Open →Cartridge database
Published mass and compliance figures, each with its source, for every cartridge in our register, and where each one lands on the Clear Wave.
Open →Who makes these
Bool Audio is a father and son making hi-fi components in a small UK workshop. We build the Clear Wave unipivot tonearm and the Clear Wave 2.0 tonearm cable, both for the Linn LP12. These calculators began as our own bench arithmetic. They are free to use, there is nothing to install, and they take no view on which cartridge or tonearm you should own.