6. Technical Explanations
Speaker Efficiency
The efficiency of a speaker system, measured in sound pressure (dB at 1W, at a
distance of 1 m), specifies its effectiveness of reproducing a given signal. The higher
the efficiency, the lower the demand regarding the performance of an amplifier and the
efforts required to reach higher volume levels.
WLM speakers excel in this respect, since they offer an exceptional and unusual
efficiency of 98 dB (1W, 1m).
6.2 Impulse Behavior
The faster and the more precise a speaker responds to the changes of a signal impulse
(by swinging the membrane forward and backward), the better the sound impression will
be. The smallest delays between the reception of the impulse and its transformation
(initiation of the membrane movement and its stop) will have a distinct impact on the
quality of the sound reproduced and perceived.
The specially hard support of the paper membranes on one side and the extremely
strong, high performance magnet coils on the other side are warrants for an
extraordinary impulse behavior of all WLM speaker systems.
6.5 PAC ("Phase Acoustic Corrected")
nique advantage of the WLM speakers; i.e. the capability
of reproducing an almost perfect sound stage in 3-dimensional extension with 2
t lend
e-like manner it is important that it
urrounding world, usually deriving from single sources,
onsist of a mix of different frequencies and are discerned and located readily in a given
ther hand, our ears have to accomplish the difficult task to
reproduced "artificially" by 2 separate loudspeakers via special
in
low frequency waves coming from the
ter
ear the
nsion. In addition, the
igher frequencies are traveling so much faster to our ears than the medium or lower
ignal portions. This will result in disturbing time lags over the entire frequency range,
lection of sound, also destroying any chance
PAC stands for a special and u
speakers.
To understand this concept we have to explain that lower frequencies alone do no
themselves and are therefore not vital for the stage building process during the sound
reproduction. Only with higher frequencies stage building (and perception) is possible.
Therefore, to reproduce a given signal in a spac
contains medium and high frequencies together with the lower frequency waves.
The prevailing sounds in our s
c
space context. On the o
amalgamate the sounds
drivers for high and medium/low frequencies to a full space-like entity.
Speakers having conventional tweeter concepts in a variety of techniques are fighting
with the difficulty to fuse the higher and lower frequencies deriving from the 2 stereo
speakers for space-like perception. The high frequency waves conventionally emitted
front direction do not merge with the medium and
same speaker and also not with the high frequencies portions coming from the twee
of the other (stereo) speaker. The listener's ear can not be betrayed, he will h
speakers rather than the music in its appropriate spacious exte
h
s
overemphasizing the distinct 2-channel ref
of a natural, space-like perception of the music reproduced.
MANUAL WLM AURA 8/11
