On Tue, 17 May 2005 14:50:04 +0100, "Keith G"
wrote:


"Don Pearce" wrote in message
...
On Tue, 17 May 2005 12:36:17 GMT, "Tim Martin"
wrote:


"Jim Lesurf" wrote in message
...
In article .com,
wrote:
Hi,

Can you please tell me the advantages and disadvantages of 4 ohm
compared to 8 ohm loudspeakers?

Depends entirely on the speakers in question, the equipment you use them
with, and your personal tasts/circumstances.

The only general comment is that *for the same applied voltage* the 4
Ohm
ones may draw more current, and that some amplifiers may not like this.

By the way, some manufacturers offer near-identical speakers in 4-ohm and
8-ohm versions, with otherwise similar specifications.. Does anyone know
how they do this ... is there some simple trick to it?

Tim


Fewer turns of thicker wire on the 4 ohm unit.


Yes, production cost-cutting exercises mainly - I've been thinking that and
waiting to see someone else post it....

It also makes the coil lighter in most cases, which can lead to
genuinely immproved efficiency. It's not *all* about cost-cutting, and
of course it gives you a bigger number for the spec-sheet sensitivity,
which automatically goes up by 3dB.
--

Stewart Pinkerton | Music is Art - Audio is Engineering