Hachiroku wrote:

> My Mazda 626 seems to have an appetite for speakers.
> I have replaced the passenger's side front speaker for the third time a
> couple weeks ago, and already it's buzzing like a bee is trapped in it.

> The speakers installed are capable of MORE than the rated wattage of the
> JVC Cd player (~22 Watts per channel, speakers are 50W or more)

50W continuous? I have some 2' tall floor speakers rated for 50W
music power but only 1W continous (instructions said not to exceed 8V,
peak-to-peak, for more than 2-3 minutes).

> All the other speakers work great, including the Driver's side dash
> replaced in January as a set with the one that went bad a couple weeks ago.
>
> There aren't any leaks, there doesn't appear to be any 'stray magentism'
> anywhere around, no obstructions or protrusions of any type into the
> speaker area.
>
> I'm out of 'inexpensive' speakers (the last one that blew was a Clarion,
> not the most expensive, but not a cheapo by any means...) Connections are
> tight.

If you don't blast them at high power all day, about the only
electrical thing that usually ruins speakers in a hurry is DC from the
amplifier. Switch a digital voltage meter to read DC volts and see if
there's more than about 0.1Vdc across the amp terminals (an analog
meter won't work for this). Don't measure to chassis ground because I
think that most car stereos now use two floating outputs (an easy way
to get higher power without higher power supply voltage).

Have you tried pressing the speaker cone to see that it moves in and
out without binding? Some of my Ford factory speakers (base audio
system) that scraped the magnet when moved also buzzed, but I had a
Ford radio cause a buzz because of some power supply problem (I think
it was the power supply that drove the LCD).