Meyer Sound ACHERON-100, ACHERON-100-RMS, ACHERON-80, ACHERON-80-RMS, ACHERON-LF Data Sheet
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DATASHEET
31.00
[787mm]
20.50
[521mm]
35.00
[889mm]
21.00
[533mm]
20.00
[508mm]
10.75
[273mm]
ACHERON® : Screen Channel Loudspeaker System
Acheron 100
At the heart of Meyer Sound's EXP line of cinema
products is the Acheron high-performance
screen channel loudspeaker. Optimized for
installation behind perforated screens, the twoway loudspeaker combines the advantages of
self-powered technology and innovative horn
design to deliver exceptional, precise coverage
for the left, right, and center sound channels for
cinema.
The Acheron loudspeaker is available in two
full-range models: the Acheron 100, with a
100-degree horizontal by 50-degree vertical
horn, which is ideal for wide theatres; and the
Acheron 80, with an 80-degree horizontal by
50-degree vertical horn, which is suitable for
more narrow theatres and re-recording stages.
The Acheron horn (patent pending) was
specifically designed for cinema use and features
a very soft roll-off outside the extremely well
behaved coverage angle. The horn is fixed within
the enclosure to ensure an accurate acoustic
crossover, phase response, and an incredibly
Dimensions
Weight
Enclosure
Mounting
31.00" w x 35.00" h x 20.50" d
(787 mm x 889 mm x 521 mm)
173 lbs (78.47 kg)
Premium birch plywood
Low gloss, black textured
Finish
3/8" threaded points on side corners for optional
bracket adapters, which allow the Acheron to be
mounted to floors with uptilt or downtilt, as well as
on top of the Acheron LF (also with uptilt or downtilt)
consistent vertical pattern between the low
and high frequencies. The Acheron’s 580 Hz
crossover point places most of the dialog in the
horn, which is ideal for cinema applications.
Boasting a frequency response of 38 Hz to
17 kHz at
±4 dB
, as well as a generous peak
output of 139 dB with very low distortion, the
Acheron stands up to the most demanding
of digital soundtracks, maintaining a wide
dynamic range and full fidelity. Designed and
manufactured at Meyer Sound's headquarters
in Berkeley, California, the Acheron's drivers
include one 15-inch low-frequency neodymium
magnet cone driver and one high-frequency
4-inch diaphragm compression driver. The
drivers yield uncompromising quality and
full bandwidth, making the Acheron suitable
for small and medium theatres, re-recording
stages, and production and postproduction
facilities.
The Acheron's sophisticated onboard amplification produces consistent and predictable results
in any system design. The proprietary Meyer
Sound power amplifier is a two-channel, class
AB/H amplifier with complementary MOSFET
output stages that yields a total output of
1685 W (3370 W peak). Built-in signal processing
includes an electronic crossover and correction
filters — to achieve a flat phase and frequency
response — along with driver protection circuitry. The self-powered design not only ensures
consistent results but also simplifies installation
in both new and existing rooms.
The optional RMS™ remote monitoring system
allows comprehensive monitoring of system
parameters on a Windows®-based computer.
Strategically placed 3/8-inch threaded points on
the side corners of the Acheron cabinet allow the
unit to be fixed to floors with uptilt or downtilt
using optional mounting brackets. The Acheron
can also be mounted on top of the Acheron LF
loudspeaker, also with uptilt or downtilt, using
optional stacking brackets.
Exceptional fidelity and extended highfrequency performance
Constant-Q horn yields uniform
response throughout the coverage area
Extraordinarily flat amplitude and
phase response for tonal accuracy
Wide horn coverage available for larger,
wider rooms with the Acheron 100
Narrow, focused coverage available for
smaller rooms with the Acheron 80
Seamless integration with the
Acheron LF loudspeaker and HMS-10
surround loudspeaker
ApplicationsFeatures & Benefits
Small to medium-sized theatres
Larger theatres with use of Acheron LF
Re-recording stages
Production and postproduction studios
Acheron LCR System with Acheron LF
Network
Remote Monitor System
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1
Case
220K
ESD
Ω
Earth/Chassis
10K
Balanced
Ω
3-
2+
LoopInput
2 231 1
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Meyer Sound, Berkeley, CA, USA
THIS PRODUCT MUST BE GROUNDED
WARNINGS:
clearance from this surface and adequate ventilation.
To reduce the risk of electric shock do not remove cover.
To reduce the risk of fire or electric shock
Refer servicing to qualified personnel.
No operator or serviceable parts inside.
do not expose this appliance to rain or moisture.
To ensure proper operation, allow at least 6 inches
ACHTUNG:
ATTENTION:
UND REPARATUR NUR DURCH ELEKTROFÃCHKRAFTE
INTERNES NE SONT AUTORISEES QU'AU
AUTHORIZADO A PERSONAL TÉCNICO CALIFICO
ATENCIÓN:
This surface may reach high tempuratures white in use.
Auto-Voltage Select
95-125V ~ 208-235V~
1400W RMS MAX 1400W RMS MAX
50-60Hz 50-60Hz
U.K. WARNING:
REFER SERVICING TO QUALIFIED PERSONNEL.
NO OPERATOR SERVICEABLE PARTS INSIDE.
Turn on 165V~ Turn off 264V~
Turn on 85V~ Turn off 134V~
Operational Voltage Range:
PERSONNEL TECHNIQUE QUALIFIÉ
THIS APPARATUS MUST BE EARTHED.
ENTRETIENET REPARATIONS
GEHÃUSE NICHT OFFENE WARTUNG
ACCESO INTERNO SOLO
To meet the SPL requirements for large rooms, the
Acheron 80 and Acheron 100
can be daisy-chained with
the Acheron LF loudspeaker,
which has been carefully
designed so its frequency and
phase responses compliment
the Acheron.
The Acheron LF has the same
low end frequency response
as the Acheron (38 Hz) and
rolls off at 320 Hz to avoid
any interference in the crossover region of the Acheron.
This coupling is optimized to
allow a single parametric filter
to achieve a flat frequency
response with approximately
10 dB more of headroom in
the low frequencies (depending on the room acoustics and
loading conditions).
Right
Center
Left
Cinema Screen
Acheron 80
Acheron 80/100 Architect Specifications
The loudspeaker shall be a self-powered, full-range system; the
transducers shall consist of a 15-inch diameter cone driver and
4-inch diaphragm compression driver. Two horn options shall
be available: 80-degree horizontal by 50-degree vertical, and
100-degree horizontal by 50-degree vertical. The loudspeaker
system shall incorporate internal processing electronics and a
two-channel amplifier, one channel for each driver. Processing
functions shall include frequency and phase correction, signal
division, and protection for the low- and high-frequency
sections. The crossover point shall be 580 Hz.
Each amplifier channel shall be class AB/H with complementary
MOSFET output stages. Burst capability for the low-frequency
channel shall be 1125 watts total with a nominal 4-ohm
resistive load and 560 watts for the high-frequency channel
with a nominal 8-ohm resistive load. Total burst power shall
be 1685 watts (3370 watts peak). Distortion (THD, IM, TIM) shall
not exceed 0.02%. Performance specifications for a typical
production unit shall be as follows, measured at 1/3-octave
resolution: operating frequency range shall be 37 Hz to 18 kHz;
phase response shall be ±30° from 700 Hz to 17 kHz; maximum
peak SPL shall be 139 dB at 1 meter, free field.
The audio input shall be electronically balanced with a 10 kOhm
impedance and accept a nominal 10 dBV (3.2 V rms, 4.5 V peak)
signal. Connectors shall be XLR (A-3) type male and female. RF
filtering shall be provided, and CMRR shall be greater than 50 dB
from 50 Hz to 500 Hz.
The internal power supply shall perform automatic voltage
selection, EMI filtering, soft current turn-on, and surge
suppression. Power requirements shall be nominal 100 V, 110 V,
or 230 V AC line at 50 or 60 Hz. UL and CE operating voltage
ranges shall be 100 to 240 V AC. Maximum peak current draw
during burst shall be 6.4 A at 115 V AC, 3.2 A at 230 V AC, and
7.2 A at 100 V AC. Current inrush during soft turn-on shall not
Acheron 80 Horn
80-degree horizontal by
50-degree vertical coverage
Acheron 100 Horn
100-degree horizontal by
50-degree vertical coverage
Circuit
breakers
Limit LEDs
Power LED
Acheron Rear Panel
Audio input and
loop output
connectors
exceed 7 A at 115 V AC, 7 A at 230 V AC, and 10 A at 100 V AC.
AC power connectors shall be locking NEMA L6-20 male inlet or
IEC 309 male inlet.
The loudspeaker system shall include support for the optional
RMS remote monitoring system module.
All loudspeaker components shall be mounted in an acoustically
vented enclosure constructed of premium birch plywood with a
black textured finish. Dimensions shall be 31.00" wide x 35.00"
high x 20.50" deep (787 mm x 889 mm x 521 mm). Weight shall
be 173 lbs (78.47 kg). Optional bracket adapters shall allow
the Acheron to be fixed to floors, as well as on top of the
Acheron LF, with uptilt or downtilt
The loudspeaker shall be the Meyer Sound Acheron.
RMS user panel
(optional)
AC power
connector (NEMA
L6-20 shown)
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