[geoff]

On 7/08/2018 1:39 AM, wrote:
Scott Dorsey wrote: "He's got a right to be, because the impedance changes with frequency. It is
not unusual to see an "8 ohm" speaker dip down to 5 ohms somewhere near the cabinet resonance"

So say it's a really cheap plywood speaker cabinet
with a resonace around 200Hz. Is that impedance
engineered to be lower at that freq?

And again, my gut instinct tells me that the lower the
impedance the EASIER it will be to drive that speaker,
especially where that speaker's impedance valleys
out. So why wouldn't the cabinet's barrel-sounding
frequency be assigned a HIGHER impedance?



Yes - easier to push more current through the speaker given a reasonably
equal output voltage. Problem is that it is the current coming through
the output devices that, when beyond their capacity, is what blows them
up. In simplistic terms P=VxI .

geoff