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RE: wise up ...

I choose to run the speakers that
people use if they have the room area to
accommodate them. The term "Hi-Efficiency" can
mean many things to many people.

There are speakers that are rated at 105db/watt
that WILL NOT run on one watt, and are sick as a Dog
on 20 watts.. What they aren't telling us is at what
watt level were those measurements made?

Check this out: the speakers I use can reach 100
db at ONE watt and have awesome dynamics, AND full
room coverage..

This example has an efficiency of 100db per watt.

I know of another speaker that is also rated at
100db per watt, but they made their PER WATT measurements
while driving the speaker at far more power than 1 watt.

Of course, it was much louder at the higher power level.
Their measurements do show 100db PER WATT when enough power
is used to force it into it's ideal range, where it starts
gaining per watt efficiency..

But what happens if we drive their speaker at ONE WATT?
It can't reach anything like 100db. It's more like 80.

So what gives? Their speaker does not have 100db PER WATT
with one watt, But it DOES have 100db PER WATT efficiency
when run at much higher power levels where it really does
give the 100 db PER WATT. They're just using many more
watts and running it in an area where it really does do
100db/watt.

In other words, like most of the smaller,
room-friendly speakers that people use, especially if
Wife Acceptance Factor is figured in, they are running
EXTREMELY non-linear speakers as far as power levels are
concerned, even if frequency response appears linear.

Linear COVERAGE OF THE ROOM is, however-- what really
counts, and that means large volume, large area speakers,
with really good, large-area transducers in them.

In simple terms, their smaller speaker will not run on
one watt, period.

Yet, its efficiency rating per watt jumps right up
there-- as long as they use enough power and obtain way over 100db
loudness. Then, they can calculate theoretical efficiency
PER WATT, but NOT with ONE watt, which would leave their
speaker dead for sure!.

In other words, it won't work on one watt and be big
and dynamic. People who want the best in home music
reproduction have speakers that will.

Incidentally, a gentle H.F. rolloff of frequencies above
what normal people can hear reproduces FAR better, more
extended "highs". Overdoing H.F. response, as compared
to the Human Ear, detracts from the highs that the
subject can actually listen to, and get a sense of
musical reality-- of "being there".

Using H.F. sensitivity beyond what you actually need,
wrecks the feeling of musical reality.

What I and others hear from good SE amps-- which are always
"rolled off" above what push/pull designers think is
necessary, is FAR better and much more extended "highs".

What one actually does hear depends on that person's
anatomy, so I don't pretend that everyone hears the
same. They don't.

Use what you like. And allow others who know what
they're doing do the same.

-Dennis-



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