6 Sep
2009
6 Sep
'09
1:15 p.m.
On Fri, Sep 04, 2009 at 06:25:32PM -0700, Chuck Guzis wrote:
On 4 Sep 2009 at 19:16, Brian Lanning wrote:
Ah yes, PMPO a.k.a. power output of the unit at the moment of
spontaneous combustion. According to those numbers, the small PC
speakers sold at random electronics stores must work on the basis of some
strange physics[0]: delivering 1000 Watt of sound (however this number
is made up) while consuming only 7 Watt of electrical power ...
Regards,
Alex.
[0] Maybe they suck in energy from the parallel bullshit universe.
--
"Opportunity is missed by most people because it is dressed in overalls and
looks like work." -- Thomas A. Edison
That marketing horsepower rating is technically,
under a very specific
scenario, correct.... believe it or not. But it's a useless number.
IIRC, it comes from the power spike that happens right when you grab
the shaft of the motor. So essentially, it's a useless power rating.
I might be off on the description. I'm not an EE and I got a
frightfully low grade in physics.
While we're on the subject--is there a different rating system for
commercial applications? Most consumer upright vacuums boast 10-12
amp motors, whatever that means. After experiencing the dubious joy
of owning several consumer vacs in about as many years, I bought a
commercial vacuum, rated for hotel use. This by comparison, has a 6
amp motor, yet it does a job that's at least as good as my last 10
amp consumer model. The motors don't seem to be very different in
size, though the commercial one is ball-bearing and metal-housed and
has a brand that I recognize.
This reminds me of the old IHF "Music Power" ratings for audio gear
of many years past. Pure stuff and nonsense.