Electro-Voice MH660C EDS User Manual
MH660C
SPECIFICATIONS
Typical
Axial Frequency Response (swept
one-third-octave plnk noise, anecholc
envlronment, 4 volts at 10 feet, normalized
for 1 watt, 1 meter into mld-bass driver;
see Figure 1):
150-20,000
Low-Frequency 3-dB-Down Point:
150 Hz
Usable Low-Frequency Limit
point):
140 Hz
Recommended Crossover Frequencies:
160 Hz, 1,600
Crossover Slopes per Octave, Suggested:
24
Recommended Signal Delay,
Mid Bass: 0.00
High
Long-Term Average Power-Handling
Capacity (see Power Handling section),
Mid Bass
(per
High Frequency
(per
Sensitivity (SPL at 1 meter, 1 watt input,
anechoic environment, band-limlted pink-
noise signal),
Mid Bass: 107
High Frequency: 111
Impedance,
Nominal (mid bass/high frequency):
Minimum (mid bass/high frequency):
Average Efficiency,
Mid Bass:
High Frequency:
Hz
(10-dB-down
Hz
dB
Frequency: 0.60
ANSl/ElA RS-426-A):
300 watts
AES2-1984/ANSI S4.26-1984):
60 watts
16
ohms/8
11 ohms/6 ohms
25%
25%
msec
msec
dB
dB
ohms
Maximum Long-Term Average Mid-Band
Acoustic Output:
75 watts
Beamwidth (angle Included by
points on polar responses, Indicated
third-octave bands of pink noise; see
Figure
2),
Vertical:
Directivity Factor
Median (see Figure 3):
Directivity Index D,,
Median (see Figure 3):
Distortion (120 dB SPL at 1 meter from
mid-bass horn uslng typlcal
spectrum; see Figure
Transducer Complement,
Polarity (all drivers):
1.
600 to 20,000 Hz Horizontal or
60 degrees +/- 25
18.2
12.6 dB
Second Harmonic,
1,000 Hz: less than 1%
10,000 Hz: less than 1%
Third Harmonic,
1,000 Hz: less than 1%
10,000 Hz: less than 1%
Mid Bass:
DL10X-SH
Kevlar
rotatable MH660 60 x 60 degree horn
High Frequency:
DH2As2 compression driver on HP66
60
x 60 degree horn coaxially mounted
to a mid-bass horn
A positive voltage applied to the positively
marked input terminal produces a positive
acoustic pressure at the front of the system
Kevlar is a registered trademark of DuPont.
R, (a), 500- to
500-
(+3.8 dB, -4.0 dB)
4),
25.4-cm
epoxy composite cone on
(10-in.) driver with
6-dB-down
one-
20,000-Hz
to 20,000-Hz
music
Coaxial
Constant-
Directivity Horn System
.
High-output high-quality music
speech for stadiums and performing-arts
venues
.
Large, correctly sized horn mouths
provide uniform
directivity
500 Hz, for Increased
difficult acoustic conditions
High
“Q”
for increased intelligibility
Suspension system for safe and easy
installation
DH2As2 2-inch
compression driver for
extended high-frequency performance
Short throw/fill-in when used with the
very-large-format MH stadium
systems
.
60
degree vertical coverage angle
Input Connectlons,
Mid Bass/High
Screw
each driver can be individually accessed;
high-frequency driver has blocking
capacitor for protection
Construction,
Main Horn Bell:
One-piece
fiberglass laminate
reinforcement
Frequency:
terminals (#10)
black polyester and
on
Hanging Hardware:
4-point,
black , 10-gauge polyester-
powder-coated steel
Dimensions,
Height:
68.6
cm (27.0 in.)
Wldth:
68.6
cm (27.0 in.)
Depth:
71
.1
Net Weight:
Shipping Weight:
DESCRIPTION
The Electro-Voice
loaded speaker system for permanent installation. Because the mouth dimensions of both
the mid-bass and high-frequency horns were
correctly chosen and are large enough with
respect
MH660C
down to 500Hz.
increases speech intelligibility and musical clarity in difficult acoustic environments.
horn systems wlth smaller radlatlng areas
simply cannot provlde the hlgh degree of
directional control associated with the
MH660C.
cm (28.0 in.)
27.2 kg (60 lb)
33.6 kg (74 lb)
MH660C is a two-way horn-
to the wavelengths reproduced, the
provides unifon directivity control
This super directivity control
and
control to
intelligibility
under
horn
barrier strip;
with composite
Other
FIGURE
1
-
Typical Axial Frequency Response (anechoic
environment, 1 watt/1 meter into mid-bass section)
, , , , , , ,,,,,, , , , , ,,
FIGURE 2 - Beamwidth vs. Frequency
,,,, , , , , ,,,
FIGURE 6 -
Hanging Points
,
FIGURE 3
FIGURE 4 -
-
Directivity
*
1
Harmonic
bass horn using typical
130
Factor and Directivity Index vs. Frequency
Distortion (120 dB SPL at one meter from
music
spectrum)
‘W_
I(D g
I0 i
a
d
t,
0
mid-
FIGURE 6 - Polar Response
“.
,
_’
5OOHZ
HORIZONTAL
,
-
VERTICAL - -
,
-
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