Stop and go

Prev Next

One of the challenges any woofer has, in particular subwoofers, is stopping and starting with any degree of accuracy. The mass of the cone on these woofers is high; there's a lot there relative to a tiny tweeter or midrange.

The woofer's motor, not much more than a magnet and coil of wire, takes a good deal of energy to make the cone move. Once in motion, it takes energy to stop its motion and reverse its path. I think of these actions like those of stepping on the gas and brake of a car. Think of how it feels to be in a car when it accelerates and brakes. Your personal mass has a lag time moving forward; as well as a tendency to keep going when the brakes are applied. A woofer's cone has the same issues as those of a passenger in a car.

Imagine for a moment the electrical signal controlling the woofer. The electrical signal demands the woofer move forward a specific distance, then back again; all at a predefined speed. Only, that's not exactly what happens, due to the tendency of the woofer to not want to move when ordered to; and its similar reluctance to stop instantly and return to where it started. To overcome these obstacles you need a good deal of power from your amp and, as well, you'd be better served with something else in the mix; a way to measure the cones movement and compare it to what's being demanded.

That's tomorrow.

Back to blog
Paul McGowan

Founder & CEO

Never miss a post


Related Posts

1 of 2