The brush works as a damper, which is handy in an undamped tonearm to navigate warped records and diminish the amplitude of the tonearm/cartridge resonant frequency. In most cases, it improves trackability and tames resonances, but if you have a tonearm sufficiently damped to keep the stylus in the groove on hideous warps, you don't need to use the damper brush.
Still, I consider the damping brush to be a really effective low-cost method to damp, considering that the KAB damper trough is $150 and damped tonearms are significantly more.
Still, I consider the damping brush to be a really effective low-cost method to damp, considering that the KAB damper trough is $150 and damped tonearms are significantly more.