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MH-Series Stadium Horns
MH large-format horns feature Manifold
®
technology, have
a high “Q” and unifor
m directivity control. Because of their
large mouth size, MH horns maintain their beamwidth to
very low frequencies – down to 250 Hz – reducing bass
“spillover” and increasing intelligibility. The HF-section con-
tains an appr
opriate medium-format HP-horn that accepts
EV two-inch-exit single or dual drivers of the designer´s
choice, extending response to 20.000 Hz. HF drivers must be
ordered separately. The dual driver doubles HF output,
important for very long throws. N/DYM
®
drivers offer the
ultimate output in the upper octaves, important when con-
temporary music is to be heard over long distances. The
large horn size also provides frequency response to 100 Hz,
typically eliminating the need for supplemental low-frequen-
cy systems. The mid-bass section featur
es Aperiodic
Enhancer™ phase plug. It is responsible for the extended
high-frequency response of the mid-band section. It makes
use of the fact that only the apex of the cone (near the voice
coil) is in motion at higher fr
equencies, and automatically
adjusts the acoustic loading to maximize acoustic output.
The main horn bell is a one-piece black polyester and fibre-
glass with fibreglass rib reinforcement. An integral grille-pro-
tection screen built into the manifold chamber protects the
mid-bass for mechanical damage. To get low-frequency
extension one octave lower, the recommended subwoofer is
QRx 218 S.
Large-format MH-horns
MH 4020 AC
(40° x 20°)
MH 6040 AC (60° x 40°)
MH 9040 AC (90° x 40°)
• 2-way coaxial horn-loaded system
• Very high sensitivity
• Very high maximum SPL
• Full-range down to 100 Hz (-10 dB)
• Mid-Bass section features Aperiodic
Enhancer™ and Manifold® Technology
• Water resistant (incl. Kevlar® epoxy cone)
• HF-horn with 2-inch throat diameter
(Driver is of the designer´s choice)
• Excellent uniform directivity control down to
low frequencies
•
Same fr
ont dimensions for unifor
m
appearance when used in arrays
• Integral 18-point hanging hardware
in polyester
-powder-coated steel for flexible mounting
MH 4020 AC MH 6040 AC MH 9040 AC
Fr
equency Range (-10 dB)
100 - 20.000 Hz 100 - 20.000 Hz 100 - 20.000 Hz
Recommended High-Pass Frequency 130 Hz (24 dB/Oct.) 130 Hz (24 dB/Oct.) 130 Hz (24 dB/Oct.)
Axial Sensitivity SPL 1W/1m 109 dB 107 dB 105 dB
Max. SPL / 1m (calc.); full space 146 dB 141 dB 139 dB
Long-Term Power Handling (Mid-Bass) 1.200 W 600 W 600 W
Short-Term Power Handling (Peak) (Mid-Bass) 4.800 W 2.400 W 2.400 W
Coverage (nominal -6 dB) H
°
x V
°
40
° x 20° (CD Horn) 60° x 40° (CD Horn) 90° x 40° (CD Horn)
Directivity Index (500 - 20.000 Hz) 18.0 dB (---/---) 13.8 dB (+0.9/-1.1 dB) 10.2 dB (+0.9/-1.1 dB)
LF woofer (transducer) 4 “x 10" (DL10X-SH) 2” x 10" (DL10X-SH) 2” x 10" (DL10X-SH)
HF thr
oat diameter (horn typ) 2" (HP420A) 2" (HP640) 2" (HP940)
Crossover Frequencies (slope) 1.600 Hz (24 dB/Oct.) 1.250 Hz (24 dB/Oct.) 1.250 Hz (24 dB/Oct.)
Nominal Impedance (mid-bass) 2 x 8 Ω 8 Ω 8 Ω
Minimum Impedance (mid-bass) 2 x 3.1 Ω 5.9 Ω 5.9 Ω
Input Connections heavy-duty copper cable heavy-duty copper cable heavy-duty copper cable
Dimensions (H x W at front x D) 1500 x 991 x 1880 mm 1500 x 991 x 1873 mm 1500 x 991 x 1534 mm
59’ x 39’ x 73.9”
59” x 39” x 73.9”
59” x 39” x 60.4”
Net W
eight (without HF-driver)
108 kg (237 lbs.)
75 kg (165 lbs.)
75 kg (165 lbs.)