Meyer Sound ACHERON-DESIGNER, ACHERON-DESIGNER-RMS Data Sheet

DATASHEET CINE-STUDIO

Acheron® Designer Screen Channel Loudspeaker

6.96 in

[177 mm]

14.00 in

[356 mm]

14.58 in

[370 mm]

6.00 in

[152 mm]

[635 mm]

25.38 in

[645 mm]

3.51 in

[89 mm]

5.25 in

[133 mm]

25.00 in

19.00 in

[483 mm]

12.25 in

[311 mm]

12.18 in

[309 mm]

14.96 in

[380 mm]

11.60 in

[295 mm]

At the heart of Meyer Sound’s EXP line of cinema products are the
Acheron® high-performance screen channel loudspeakers. The
Acheron Designer is the most compact of the Acheron models,
making it an excellent choice for sound design suites, screening
rooms, private theaters, and small commercial theaters. Optimized
for installation behind perforated screens, the Acheron Designer
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 Designer delivers the same 38 Hz to 17 kHz frequency
response as other Acheron models. This consistency of fidelity
between models ensures that soundtracks monitored with the
Acheron Designer translate accurately when played back in larger
rooms with the Acheron 100, Acheron 80, AcheronStudio, or other
calibrated cinema systems.

Designed specifically for cinema, the Acheron horn features
a very soft roll-off beyond its 80° horizontal by 50° vertical
coverage pattern. The extremely well-behaved horn ensures an
accurate acoustic crossover and consistent vertical coverage
pattern through the critical crossover range between the low- and
high-frequency drivers. The optimized crossover point places most
of the dialog in the horn, which is ideal for cinema applications.

Designed and manufactured at Meyer Sound’s headquarters in
Berkeley, California, the Acheron Designer’s drivers include one

13.25 in

[337 mm]

12-inch low-frequency cone driver, housed in an optimally tuned,
ported enclosure, and one high-frequency 4-inch diaphragm
compression driver. The drivers yield uncompromising quality
and are powered by sophisticated onboard amplification. The
self-powered design ensures consistent results and simplifies
installations in both new and existing rooms.

A proprietary two-channel, Class-D amplifier powers each driver
channel independently. Onboard processing includes driver
protection circuitry, an electronic crossover, and correction filters,
ensuring flat frequency and phase responses. The rear-mounted,
recessed heat sink yields efficient convection cooling and allows
the unit to be placed flat against walls when necessary.

The optional RMS™ remote monitoring system provides
comprehensive monitoring of loudspeaker parameters from a
Mac® or Windows®-based computer running Compass® Control
Software.

The Acheron Designer enclosure is constructed of premium
multi-ply birch and coated with a slightly textured black finish.
The cabinet is fitted with two attachment points on the bottom
for the optional MYA-DES cradle-style yoke, allowing the unit
to be suspended from a single hanging point. An optional black
cloth grille frame is available for installations where the Acheron
Designer is not placed behind a screen.

FEATURES AND BENEFITS

• High peak power output with ultra-low distortion

• Exceptional fidelity and extended high-frequency performance

• Uniform response throughout coverage area due to the Constant-Q horn

• Extraordinarily flat amplitude and phase response for tonal accuracy

• Seamless integration with HMS surround loudspeakers, the X-400C and X-800C cinema subwoofers,

some ULTRA family loudspeakers and more

APPLICATIONS

• Sound design suites

• Small theaters

• Custom, private theaters

• Re-recording stages

• Theatrical and home entertainment facilities

ACCESSORIES AND ASSOCIATED PRODUCTS

MYA-DES Mounting Yoke: Cradle-style mounting yoke that suspends a single Acheron Designer loudspeaker and supports a wide range of horizontal

and vertical adjustment.

Galileo GALAXY Network Platform: The Galileo GALAXY Network Platform provides state-of-the-art audio control technology for loudspeaker
systems with multiple zones. With immaculate sonic performance, it provides a powerful tool set for corrective room equalization and creative fine­tuning for a full range of applications.

MYA-DES Mounting Yoke GALAXY Network Platform

SPECIFICATIONS

ACOUSTICAL

1

COVERAGE

TRANSDUCERS

AUDIO INPUT

Operating Frequency Range237 Hz – 18 kHz

Frequency Response338 Hz – 17 kHz ±4 dB

Phase Response 230 Hz – 17 kHz ±30°

Linear Peak SPL4128 dB with 18 dB crest factor (M-noise), 125.5 dB (Pink noise), 129 dB (B-noise)

Horizontal Coverage 80°

Vertical Coverage 50°

Low Frequency 12-inch cone driver; 2 Ω nominal impedance

High Frequency 4-inch diaphragm compression driver; 8 Ω nominal impedance

Type Differential, electronically balanced

Maximum Common Mode Range ±5 V DC, clamped to earth for voltage transient protection

Connectors

Input Impedance 10 kΩ differential between pins 2 and 3

XLR 3-pin female input with male loop output; optional XLR 5-pin connector to accommodate both
balanced audio and RMS signals.

AMPLIFIER

AC POWER

CURRENT DRAW

Pin 1: Chassis/earth through 1 kΩ, 1000 pF, 15 V clamp network to provide virtual ground lift at audio
frequencies

Pin 2: Signal +

5

Wiring

Nominal Input Sensitivity 10 dBV (3.2 V rms) continuous is typically the onset of limiting for noise and music

Input Level

Total Output Power61400 W peak

THD, IM, TIM < 0.02%

Cooling Convection, with recessed heat sink

Connector powerCON 20 input with loop output

Automatic Voltage Selection 90–265 V AC

Safety Rated Voltage Range 100–240 V AC, 50–60 Hz

Turn-on and Turn-off Points 90 V AC turn-on, no turn-off; internal fuse-protection above 265 V AC

Idle Current 0.23 A rms (115 V AC); 0.19 A rms (230 V AC); 0.24 A rms (100 V AC)

Pin 3: Signal –

Pin 4: RMS (polarity insensitive)

Pin 5: RMS (polarity insensitive)

Case: Earth ground and chassis

Audio source must be capable of producing of +20 dBV (10 V rms) into 600 Ω to produce the
maximum peak SPL over the operating bandwidth of the loudspeaker.

Type Two channel, Class-D

Maximum Long-Term Continuous Current (>10 sec) 1.58 A rms (115 V AC); 0.83 A rms (230 V AC); 1.78 A rms (100 V AC)

Burst Current (<1 sec)73.1 A rms (115 V AC); 1.4 A rms (230 V AC); 3.6 A rms (100 V AC)

Maximum Instantaneous Peak Current 12.0 A peak (115 V AC); 8.0 A peak (230 V AC); 12.4 A peak (100 V AC)

Inrush Current <25 A peak (115 V AC); 54 A peak (230 V AC); 20 A peak (100 V AC)

SPECIFICATIONS, CONT’D.

RMS NETWORK (OPTIONAL)

Two-conductor twisted-pair network that reports all operating parameters of amplifiers to system
operator’s host computer.

PHYSICAL

Dimensions W: 19.00 in (483 mm) x H: 25.38 in (645 mm) x D: 14.96 in (380 mm)

Weight 76 lb (34.5 kg)

Enclosure Premium multi-ply birch with slightly textured black finish

Protective Grille Attachment points on cabinet front corners for optional grille frame with black cloth

Rigging Two threaded M6 attachment points on cabinet bottom for optional MYA-DES cradle-style yoke

NOTES

1. Loudspeaker system predictions for coverage and SPL are available in Meyer Sound’s MAPP System Design Tool.

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 m.

4. Linear Peak SPL is measured in free-field at 4 m referred to 1 m. Loudspeaker SPL compression measured with M-noise at the onset of limiting,
2-hour duration, and 50 °C ambient temperature is < 2 dB.

M-noise is a full bandwidth (10 Hz–22.5 kHz) test signal developed by Meyer Sound to better measure the loudspeaker’s music performance. It
has a constant instantaneous peak level in octave bands, a crest factor that increases with frequency, and a full bandwidth Peak to RMS ratio of
18 dB.

Pink noise is a full bandwidth test signal with Peak to RMS ratio of 12.5 dB.

B-noise is a Meyer Sound test signal used to ensure measurements reflect system behavior when reproducing the most common input spectrum,

and to verify there is still headroom over pink noise.

5. Pins 4 and 5 (RMS) only included with XLR 5-pin connector that accommodates both balanced audio and RMS signals.

6. Peak power based on the maximum unclipped peak voltage the amplifier will produce into the nominal load impedance.

7. AC power cabling must be of sufficient gauge so that under burst current rms conditions, cable transmission losses do not cause the
loudspeaker’s voltage to drop below the specified operating range.

ARCHITECTURAL SPECIFICATIONS

The loudspeaker shall be a self-powered, full-range system; the
transducers shall consist of a 12-inch diameter cone driver and a 4-inch
diaphragm compression driver on an 80° horizontal by 50° vertical horn.
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.

Each amplifier channel shall be Class-D. Peak power shall be 1400 W.
Distortion (THD, IM, TIM) shall not exceed 0.02 percent. 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 230 Hz to 17 kHz ±30°; linear peak SPL shall
be 128 dB with 18 dB crest factor, measured with M-noise, free-field at
4 meters and referred to 1 meter.

The audio input shall be electronically balanced with a 10 kΩ impedance
and accept a nominal 10 dBV (3.2 V rms) signal. Connector shall be
3-pinXLR female with parallel looping male.

The internal power supply shall perform automatic voltage selection, EMI

Meyer Sound Laboratories, Inc.
2832 San Pablo Avenue
Berkeley, CA 94702

+1 510 486.1166
meyersound.com/contact
meyersound.com

filtering, soft current turn-on, and surge suppression. Power requirements
shall be nominal 100, 110, or 230 V AC line current at 50 or 60 Hz. UL and
CE operating voltage range shall be 100 to 240 V AC. Current draw during
burst (<1 sec) shall be 3.1 A at 115 V AC, 1.4 A at 230 V AC and 3.6 A
at 100 V AC. Maximum instantaneous peak current draw shall be 12.0A
at 115 V AC, 54 A at 230 V AC, and 12.4 A at 100 V AC. The AC power
connector shall be a PowerCON locking connector with loop output.

The loudspeaker system shall provide facilities for installing Meyer Sound’s
optional RMS remote monitoring system.

All loudspeaker components shall be mounted in an acoustically vented
enclosure constructed of premium multi-ply birch plywood with a slightly
textured black finish. An optional grille frame with protective, black cloth
shall be available. Dimensions shall be W: 19.00 in (483 mm) x H: 25.38 in
(645 mm) x D: 14.96 in (380 mm) without the optional grille frame. Weight
shall be 76 lb (34.5 kg) with the optional grille frame. The cabinet bottom
shall include protective, plastic skids, as well as two M6 attachment points
for the optional MYA-DES cradle-style yoke.

The loudspeaker shall be the Meyer Sound Acheron Designer.

Acheron Designer

04.211.004.01 B
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