I need an explanation of "damping factor".


Help me out here with the spec of "damping factor", and how this relates to bass control. For example, most Mac amps with the autoformers have a damping factor of 40. My MC7200 is rated at 200, but my Adcom 5500 is rated at 700. At what point does this spec become meaningless? Thanks for any help!
alnan

Showing 1 response by twl

The damping factor is the output impedance of an amplifier, divided into the speaker impedance. If the amp's output impedance is 0.5 ohm, and the speaker impedance is 8 ohm, then the damping factor is 16.

It is typically discussed in terms of the control the amplifier has over the speaker cone excursion. It is primarily important in the bass response, where the cones are at maximum excursions.

The levels of damping factor importance are subject to opinions. Some damping factor is required, or the amp will oscillate, which will happen if the speaker impedance drops below the amp output impedance.