DIYbanter - View Single Post

Dave Plowman (News)

In article . com,
wrote:
I have a subwoofer in which there is a strange noise with the speaker
as if the voice coil or the cone of the speaker is touching somewhere
so wat to do to prevent the noise . . .

It's likely been overdriven and the voice coil has distorted. Turning the
driver upside down sometimes works.

To help prevent this happening again a cheap power limiter can be made by
wiring car bulbs (12 volt) of about the same wattage in series with the
speaker. Parallel bulbs if needed to get the correct wattage starting with
a 55 watt headlamp bulb. These have a very low resistance when cold so
won't effect the sound much - but drive the unit too hard and they light
up reducing the power. Not Hi-Fi exactly but a good trick to protect
expensive speakers from that over enthusiastic moment. Ideal for teenage
parties. ;-)

--
*Why doesn't glue stick to the inside of the bottle?

Dave Plowman London SW
To e-mail, change noise into sound.