|
The ins and outs of speakers
RMS stands for "Root Mean Square", which
is a mathematical formula for calculating the average amount of
power an amplifier can continuously produce. There is no legal standard
for calculating RMS watts for an amplifier. Most amplifier makers
get a "UL" Rating from the Underwriters Labratories to
obtain the most 'true' RMS rating.
Since most amps sound their best when they are 'cranked',
some musicians look at the Peak wattage more than the RMS rating.
Also, tube-amplifiers are usually not rated by RMS.
PMPO stands for Peak Music Power Output. There is
no industry standard for PMPO so you don't really have a way to
calculate an accurate rating.
So, how to buy: by recommendation, people who have
tried and tested the speakers.
History of speakers:
In 1877 Ernst Siemens patented the first loudspeaker.
Englishmen Sir Oliver Lodge received the second patent for a loudspeaker
on April 27, 1898. This was all before music was electrified.
In 1924, two General Electric researchers, Chester
W. Rice and Edward Washburn Kellogg patented the modern, moving
coil, direct radiator loudspeaker, which become the prominent design
for all loudspeakers The Rice and Kellogg loudspeakers were sold
to consumers under the name of "Radiola'' loudspeakers in 1926.
The first box-enclosed loudspeakers were invented
by the Cabesse, a French company, in 1958.
More
about history of speakers
|
