Crest Audio LH3 LOUDSPEAKER Spécifications - Page 2

Parcourez en ligne ou téléchargez le pdf Spécifications pour {nom_de_la_catégorie} Crest Audio LH3 LOUDSPEAKER. Crest Audio LH3 LOUDSPEAKER 4 pages.

Imprimer la page
Crest Audio LH3 LOUDSPEAKER Spécifications
Specifications
Power Handling
There are many different approaches to
power handling ratings. Crest Audio rates
this unit's system power handling using a
modified form of the AES Standard 2-
1984. Utilizing audio band limited (20 Hz
- 20 kHz) pink noise with peaks over four
times the RMS level, this strenuous test
signal assures the user that every portion
of this system can withstand high inpact
music. The test signal contains large
amounts of low frequency energy, effec-
tively simulating the frequency content of
live music situations. High frequency test
signals expose the speaker system to
synthesized tones that may extend
beyond audibility. This rating is contingent
on having a minimum of 3 dB of amplifier
headroom available so as to ensure that
clipping does not occur.
Frequency Response
This measurement is useful in determin-
ing how accurately a given unit repro-
duces an input signal. The frequency
response of the LH3 (Figure 1) is meas-
ured at a distance of 1 meter using a 1
Watt (into the nominal impedance) swept-
sine input signal.
Directivity
Beamwidth is derived from the -6 dB
points from the polar plots which are
measured in a whole space anechoic
environment. Q and Directivity Index
(Figures 3 & 4) are plotted for the on-axis
measurement position. These are specifi-
cations that provide a reference to the
coverage characteristics of the unit. These
parameters provide insight for proper
placement and installation in the chosen
environment.
Amplitude Response (1W 1m On-Axis)
110
100
90
80
70
20
50
100
Figure 1
Lower Curve: Midrange Contour = Norm, Upper Curve: Midrange Contour = High
100
50
30
20
Z
( )
10
5
3
2
1
20
50
100
Figure 2
Lower Curve: Midrange Contour = High, Upper Curve: Midrange Contour = Norm
360
300
180
140
100
80
60
40
Horizontal
30
Vertical
20
50
100
Figure 3
100
Q
10
1
20
50
100
Figure 4
LH
TM
3 Loudspeaker
200
500
1k
2k
Frequency (Hz)
Impedance
200
500
1k
2k
Frequency (Hz)
Beamwidth
200
500
1k
2k
Frequency (Hz)
Q & Directivity Index
200
500
1k
2k
Frequency (Hz)
5k
10k
20k
5k
10k
20k
5k
10k
20k
20
Di
10
0
5k
10k
20k