I have a question

If a speaker coil is partially damaged, does it have any effect on the amplifier?

Im going to get it fixed, but I was just wondering.

CrazyNeutrino said:

I have a question

If a speaker coil is partially damaged, does it have any effect on the amplifier?

Im going to get it fixed, but I was just wondering.

It certainly could effect the amp. The amp is designed with a minimum loading in mind and a damaged coil may be placing a much smaller load, or even a short circuit, om the output.

sibeen said:

CrazyNeutrino said:

I have a question

If a speaker coil is partially damaged, does it have any effect on the amplifier?

Im going to get it fixed, but I was just wondering.

It certainly could effect the amp. The amp is designed with a minimum loading in mind and a damaged coil may be placing a much smaller load, or even a short circuit, om the output.

Thanks for that info

alignment/clearance problems are not uncommon, generally you check for by moving the cone in and out(listen and feel). Indications on dissasembly are scrub marks on the coil etc. Sometimes alignment problems happen from the coil overheating, the heat is tranfered into the former and softens the glue where the former mounts into the cone. Too the former repeatedly crashing into the back can deform it. When speakers are dropped the entire cage can be bent out of shape, causing misalignment.

generally overheated voice coils obviously stink. Shorted turns changes the the R (resistance) and L (inductance), and the speaker crossovers (filters) work differently.

most audio amplifers are designed to drive quite a range of impedance without damage.

Worst case situation for an amplifer is generally determined by the current through the output devices + voltage drop across those, some combination of those two things. This determines the power dissipation. To keep the devices within a safe thermal range the heat need be tranfered. The lower the impedance (greater the load) seen by the amplifer the greater the power dissipation in the output devices. Most amplifers have circuitry that keeps things within safe operating parameters, like current limiting and thermal protections, or some combination. Things can be folded back or disconnected.

Generally a minimum load impedance is stated, so you can expect whatever performance into that load (properly cooled at whatever ambient temperature).