What's the maths involved in working out how hard I can drive my speakers?
And what goes wrong when they're driven too hard, is it the coil rouching
the magnet?

On Mon, 6 Oct 2003 20:49:10 +0100, "The EggKing"
wrote:

What's the maths involved in working out how hard I can drive my speakers?
And what goes wrong when they're driven too hard, is it the coil rouching
the magnet?

Huge question. The maths relates to both the driver and the cabinet.
In general at the lowest frequencies overdrive will cause the
suspension to reach the end of its linear travel. This will probably
not involve hitting the magnet. At higher frequencies you generally
overheat the coil and melt the varnish holding it all together.

d

_____________________________

http://www.pearce.uk.com

On Mon, 6 Oct 2003 20:49:10 +0100, "The EggKing"
wrote:

What's the maths involved in working out how hard I can drive my speakers?
And what goes wrong when they're driven too hard, is it the coil rouching
the magnet?

Huge question. The maths relates to both the driver and the cabinet.
In general at the lowest frequencies overdrive will cause the
suspension to reach the end of its linear travel. This will probably
not involve hitting the magnet. At higher frequencies you generally
overheat the coil and melt the varnish holding it all together.

d

_____________________________

http://www.pearce.uk.com

Thanks for that. This is the sort of stuff I'm craving after. I need a
(preferably) cheap book on these audio fundamentals. I have the Art Of
Digital Audio but as you can imagine it deals mainly with the digital domain
(good title really). But I need to know more about the important bit. That's
the audio at each end of the digital link.

"Don Pearce" wrote in message
...
On Mon, 6 Oct 2003 20:49:10 +0100, "The EggKing"
wrote:

What's the maths involved in working out how hard I can drive my
speakers?
And what goes wrong when they're driven too hard, is it the coil rouching
the magnet?

Huge question. The maths relates to both the driver and the cabinet.
In general at the lowest frequencies overdrive will cause the
suspension to reach the end of its linear travel. This will probably
not involve hitting the magnet. At higher frequencies you generally
overheat the coil and melt the varnish holding it all together.

d

_____________________________

http://www.pearce.uk.com

Thanks for that. This is the sort of stuff I'm craving after. I need a
(preferably) cheap book on these audio fundamentals. I have the Art Of
Digital Audio but as you can imagine it deals mainly with the digital domain
(good title really). But I need to know more about the important bit. That's
the audio at each end of the digital link.

"Don Pearce" wrote in message
...
On Mon, 6 Oct 2003 20:49:10 +0100, "The EggKing"
wrote:

What's the maths involved in working out how hard I can drive my
speakers?
And what goes wrong when they're driven too hard, is it the coil rouching
the magnet?

Huge question. The maths relates to both the driver and the cabinet.
In general at the lowest frequencies overdrive will cause the
suspension to reach the end of its linear travel. This will probably
not involve hitting the magnet. At higher frequencies you generally
overheat the coil and melt the varnish holding it all together.

d

_____________________________

http://www.pearce.uk.com

"The EggKing" wrote in message
...
What's the maths involved in working out how hard I can drive my speakers?

**Pretty darned complex. I have some computer software which can calculate
it for me in about 5 seconds. Given my computer calculates stuff at
something like 2,000 MIPS, I guess that means you'll be calculating the same
stuff, with a pocket calculator for the next couple of thousand years.

And what goes wrong when they're driven too hard, is it the coil rouching
the magnet?

**That is one possibility. There are a raft of others, including:

* The voice coil exiting the magnetic field at the front of the speaker.
* Over-heated voice coils.
* Damaged sections of the cone, where it meets the voice coil former.


--
Trevor Wilson
www.rageaudio.com.au

"The EggKing" wrote in message
...
What's the maths involved in working out how hard I can drive my speakers?

**Pretty darned complex. I have some computer software which can calculate
it for me in about 5 seconds. Given my computer calculates stuff at
something like 2,000 MIPS, I guess that means you'll be calculating the same
stuff, with a pocket calculator for the next couple of thousand years.

And what goes wrong when they're driven too hard, is it the coil rouching
the magnet?

**That is one possibility. There are a raft of others, including:

* The voice coil exiting the magnetic field at the front of the speaker.
* Over-heated voice coils.
* Damaged sections of the cone, where it meets the voice coil former.


--
Trevor Wilson
www.rageaudio.com.au