Meyer Sound M1D User manual

crossover design similar to that pioneered
in Meyer Sound’s UPM loudspeakers. At the
lowest frequencies, both 5-inch drivers
combine to reproduce powerful, coher-
ent bass. In the mid frequencies, however,
the crossover feeds the signal to only one
driver; this technique eliminates interfer-
ence between the two drivers (that would
otherwise occur at shorter wavelengths) in
order to maintain optimal polar and fre-
quency response characteristics. The three
vertically aligned dome drivers act as a
small line array, focusing the sound into
a tight vertical coverage pattern while the
constant-directivity horn maintains broad
horizontal coverage.
The bi-amplified M1D incorporates a
complementary MOSFET power amplifier
module with 500 watts total burst capa-
bility, together with active crossover and
optimized frequency and phase response
correction circuitry. AC power is switchable
in the range of 90 to 264 V AC, at 50 or 60
Hz. Integral peak and rms limiters protect
the loudspeaker components from over-
excursion and over-heating.
The Meyer Sound M1D ultra-compact
curvilinear array loudspeaker brings the
singular advantages of self-powered line
arrays to sound reinforcement applications
in small and mid-sized venues. The excep-
tionally compact enclosure enables sound
designers to achieve high output, precise
pattern control with very low distortion
from a lightweight and unobtrusive sys-
tem. The M1D provides a substantial peak
SPL of 125 dB at 1 meter with an operat-
ing frequency range of 60 Hz - 18 kHz and
is designed specifically for implementing
vertical curvilinear arrays of up to 16 cabi-
nets having 0- to 8-degree splay between
adjacent units. This design affords the
flexibility to tailor vertical coverage by
varying the number and splay of cabinets
in the array while maintaining a consistent
100° horizontal coverage.
The M1D loudspeaker system comprises
two 5-inch cone drivers and three 0.75-
inch high-frequency metal dome tweeters
with neodymium magnets. To assure the
smoothest response in the critical mid-
range, the M1D incorporates a complex
Extremely compact and lightweight; forms
virtually “invisible” PAs
Very flat response for exceptional accuracy
and imaging
Constant-Q horn assures uniform coverage
features & benefits
Unique crossover design eliminates mid-
range combing
Seamless integration with other M Series
models
M1D™ : Ultra-Compact Curvilinear Array Loudspeaker
DATASHEET
Dimensions
Weight
Enclosure
Finish
Protective Grille
Rigging
The M1D’s vented, trapezoidal cabinet is
constructed from multiply hardwood and
has a textured hard shell finish. The M1D
incorporates QuickFly rigging as stan-
dard, and utilizes connecting links that are
secured to the steel and aluminum rigging
end frames by quick release pins. An inge-
nious arrangement of rigging holes allows
quick and easy adjustment of cabinet splay
for maximum freedom in customizing verti-
cal coverage. The optional QuickFly MG-1D
multipurpose grid allows either flying or
ground stacking various combinations of
M1D and M1D-Sub. Up to 16 M1Ds (or the
equivalent weight of M1D and M1D-Sub)
with a 7:1 safety factor may be flown, or
up to eight M1Ds or four M1D-Subs may be
ground stacked. For flying only, the simpler
optional MTG-1D will support up to 16 M1Ds
(or the equivalent weight of M1D and M1D-
Sub) with a 7:1 safety factor.
M1D comes equipped with Meyer Sound’s
RMS™ remote monitoring system as stan-
dard. RMS allows the full range of oper-
ating parameters to be monitored over a
network using a Windows® computer.
applications
Compact voice reinforcement systems
Theatrical sound reinforcement
Portable and installed audio-visual
systems
Front and under-balcony fill
M SERIES
23.04" W x 7.12" H x 8.50" D
(585 mm x 181 mm x 216 mm)
31 lbs (14.06 kg); shipping: 35 lbs (15.88 kg)
Multi-ply hardwood
Black textured
Powder-coated hex stamped steel
QuickFly® MRF-1D rigging frame
5.07
[129 mm]
4.50
[114 mm]
23.04
[585 mm]
8.50
[216 mm]
7.12
[181 mm]
5.07
[129 mm]
4.50
[114 mm]
23.04
[585 mm]
8.50
[216 mm]
7.12
[181 mm]

M1D specifications
1. The low-frequency power response
of the system will increase according
to the length of the array.
2. Recommended maximum operating
frequency range. Response depends
on loading conditions and room
acoustics.
3. Free field, measured with 1/3 octave
frequency resolution at 4 meters.
4. Measured with music at 1 meter.
5. At these frequencies, the transducers
produce equal sound pressure levels.
6. To eliminate interference at short
wavelengths, the two 5-inch
drivers work in combination at low
frequencies (60 Hz – 1000 Hz). At
mid frequencies (1000 Hz – 1900
Hz) only one cone driver is fed from
the crossover to maintain optimal
polar and frequency response
characteristics.
7. Power handling is measured under
AES standard conditions: transducer
driven continuously for two hours
with band-limited noise signal having
a 6 dB peak-average ratio.
8. The three drivers are coupled to a
constant-directivity horn.
9. Wattage rating is based on the
maximum unclipped burst sine-
wave rms voltage that the amplifier
will produce into the nominal load
impedance. Low channel: 30 V rms (42
V pk); high channel: 27 V rms (38 V pk)
10. No automatic turn-off voltages.
Voltages above 264 V AC are fuse
protected but may cause permanent
damage to the power supply.
Voltages below 90 V AC may result in
intermittent operation.
11. Current draw for a single loudspeaker.
Loop out not used.
architect specifications
meyer sound laboratories inc.
2832 San Pablo Avenue
Berkeley, CA 94702
T: +1 510 486.1166
F: +1 510 486.8356
[e-mail]
www.meyersound.com
M1D - 04.115.001.01
Made by Meyer Sound, Berkeley, CA, USA
European Office:
Meyer Sound Germany
GmbH
Carl Zeiss Strasse 13
56751 Polch, Germany
Copyright © 2003
Meyer Sound Laboratories Inc.
All rights reserved
Operating Frequency Range2
Frequency Response3
Phase Response
Maximum Peak SPL4
Dynamic Range
Horizontal Coverage
Vertical Coverage
Low Frequency6
High Frequency8
Type
Maximum Common Mode Range
Connectors
Input Impedance
Wiring
DC Blocking
CMRR
RF Filter
TIM Filter
Nominal Input Sensitivity
Input Level
Type
Output Power9
THD, IM, TIM
Load Capacity
Cooling
Connector
Voltage Selection
Safety Agency Rated Operating Range
Turn-on and Turn-off Points10
Current Draw
11
: Idle Current
Max Long-Term Continuous Current (>10 sec)
Burst Current (<1 sec)
Ultimate Short-Term Peak Current Draw
Inrush Current
60 Hz - 18 kHz
75 Hz - 15 kHz ±4 dB
800 Hz - 12 kHz ±45°
125 dB
>110 dB
100°
Varies, depending on array length and configuration; for a single
loudspeaker, 10° minimum
1900 Hz
Two 5" cone drivers
Nominal impedance: 8 Ω
Voice coil size: 1"
Power-handling capability: 200 W (AES)7
Three 0.75" metal dome tweeters with neodymium magnets
Nominal impedance: 8 Ω
Voice coil size: 20 mm
Power-handling capability: 15 W (AES)7
Differential, electronically balanced
±15 V DC, clamped to earth for voltage transient protection
Female XLR input with male XLR loop output
10 kΩ differential between pins 2 and 3
Pin 1: Chassis/earth through 220 kΩ, 1000 pF, 15 V clamp network to
provide virtual ground lift at audiofrequencies
Pin 2: Signal +
Pin 3: Signal -
Case: Earth ground and chassis
Differential DC blocking up to max common mode voltage
>50 dB, typically 80 dB (50 Hz - 500 Hz)
Common mode: 425 kHz; Differential mode: 142 kHz
Integral to signal processing (<80 kHz)
0 dBV (1 V rms, 1.4 V pk) continuous average is typically the onset of
limiting for pink noise and music
Audio source must be capable of producing a minimum of +20 dBV (10
V rms, 14 V pk) into 600 Ω inorder to produce maximum peak SPL over
the operating bandwidth of the loudspeaker
Two-channel complementary MOSFET output stages (class AB/bridged)
500 W total
<.02%
4 Ω low channel, 2 Ω high channel
Forced air cooling over amplifier heatsink
PowerCon with looping output
Automatic
100 V AC - 240 V AC; 50/60 Hz
Continuous 90 V AC - 264 V AC; 50/60 Hz
0.41 A rms (115 V AC); 0.33 A rms (230 V AC); 0.42 A rms (100 V AC)
3.2 A rms (115 V AC); 1.6 A rms (230 V AC); 3.7 A rms (100 V AC)
5.0 A rms (115 V AC); 2.5 A rms (230 V AC); 5.8 A rms (100 V AC)
17 A pk (115 V AC); 8.5 A pk (230 V AC); 20 A pk (100 V AC)
15 A pk (115 V AC); 13 A pk (230 V AC); 15 A pk (100 V AC)
Equipped for two conductor twisted-pair network, reporting all
operating parameters ofamplifiers to system operator’s host computer.
Acoustical1
Coverage
Crossover5
Transducers
Audio Input
Amplifiers
AC Power
RMS Network
The loudspeaker shall be a self-powered, full-range system
for deployment in vertical curvilinear array systems. The low-
frequency transducers shall consist of two 5-inch cone drivers
with 1-inch voice coil. The high-frequency transducers shall
be three 0.75-inch metal dome tweeters coupled via a custom
manifold to a 100° horizontal constant directivity horn.
The loudspeaker shall incorporate internal processing elec-
tronics and a two-channel amplifier. Processing functions
shall include equalization, phase correction, driver protection
and signal division for the high- and low-frequency sections.
The crossover point (equal sound pressure levels between
high and low frequency transducers) shall be 1900 Hz. An
additional passive low-frequency crossover shall cause
the two low-frequency transducers to work in combination
between 60 and 1000 Hz, with only one working between
1000 Hz and 1900 Hz, to maintain optimal polar response
characteristics.
Each amplifier channel shall be class AB/bridged with
complementary MOSFET output stages. Burst capability shall
Notes:
be 500 watts total. Distortion (THD, IM, TIM) shall not exceed
0.02%. Protection circuits shall include peak and rms limit-
ing. The audio input shall be electronically balanced with a
10 kOhm impedance and accept a nominal 0 dBV (1 V rms, 1.4
V pk) signal (+20 dBV to produce maximum SPL). Connectors
shall be XLR (A-3) type male and female. RF filtering shall
be provided, and CMRR shall be greater than 50 dB (80 dB,
50 – 500 Hz).
Performance specifications for a typical production unit shall
be as follows, measured at 1/3 octave resolution: Operating
frequency range shall be 60 Hz to 18 kHz. Phase response
shall be ±45° from 800 Hz to 12 kHz. Maximum SPL shall be
125 dB at 1 m. Beamwidth shall be 100° horizontal. Vertical
coverage in multi-cabinet arrays shall be dependent on
system configuration; for a single cabinet, the minimun shall
be 10°.
The internal power supply shall perform automatic voltage
selection, EMI filtering, and surge suppression. Powering
requirements shall be nominal 90 V AC to 264 V AC line cur-
rent at 50 Hz or 60 Hz. UL and CE operating voltage range
shall be 100 V AC to 240 V AC. Current draw during burst
shall be 5 A rms at 115 V AC, 2.5 A rms at 230 V AC and
5.8 A rms at 100 V AC. Inrush current during turn-on shall
not exceed 15 A at 115 V. AC power connectors shall be
PowerCon with looping output.
The loudspeaker system shall incorporate the electronics
module for Meyer Sound’s RMS remote monitoring system.
All loudspeaker components shall be mounted in an
enclosure constructed of multi-ply hardwood with a
black textured finish. The front protective grille shall be
powder-coated, hex stamped steel. Dimensions shall be
23.04" wide x 7.12" high x 8.50" deep (585 mm x 181 mm x
216 mm). Weight shall be 31 lbs (14 kg).
The loudspeaker shall be the Meyer Sound M1D.
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