oil in speaker coil section

[space2000]

hi, is ther any one knows about puting oil into loud speaker coil section? i just want to know why should put oil in there?

thank you.

[badman]

It's like oil, it's something called 'ferrofluid'. It's a magnetic liquid, useful in improving conduction of heat from the voicecoil to the magnet structure. This gives greater power handling. It also contributes to influencing the low end response of the driver (usually a tweeter).

Whether it's desirable or not depends upon a variety of factors. Don't just try adding it, you may ruin the response of the driver near Fs, or overdamp it throughout its operating range