Meyer Sound ACHERON 80,L6-20,PTD

Meyer Sound ACHERON 80,L6-20,PTD

Meyer Sound ACHERON 80,L6-20,PTD

Meyer Sound ACHERON 80,L6-20,PTD

ACHERON 80,L6-20,PTD

SKU: MSL-09.188.001.03
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Overview

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 two-way 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 of cinema.

The Acheron loudspeaker is available in two full-range models: the Acheron 100, with a 100° horizontal by 50° vertical horn, which is ideal for wide theaters; and the Acheron 80, with an 80° horizontal by 50° vertical horn, which is suitable for narrower theaters and re-recording stages.

The Acheron horn 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 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 linear peak SPL of 135 dB with crest factor of 18.5 dB (measured with M-noise) 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 theaters, 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 from a host computer running Compass® software.

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.

Features and Benefits

  • Small footprint and narrow width are ideal for small venues or fill applications
  • Amazing power-to-size ratio
  • Exceptional linearity and transient reproduction at any level, high peak power output, and extremely low distortion
  • Self-powered to simplify setup and increase reliability
  • Flexible rigging for flown and ground-stacked arrays
  • Integrates easily with Meyer Sound’s 750-LFC, 900-LFC, and LEOPARD loudspeakers

Applications

  • Small to medium-sized theaters
  • Larger theaters with use of Acheron LF
  • Re-recording stages
  • Production and postproduction studios

Acheron LF Loudspeaker

The Acheron LF loudspeaker can be paired with the Acheron 80 or Acheron 100 screen channel loudspeaker to deliver the low-frequency headroom required by larger theaters. The self-powered Acheron LF with dual 15-inch drivers boosts the headroom on the LCR channels, converting each Acheron loudspeaker to a system with three low-frequency drivers in an aligned column.

The unique multi-way, gradated design offers smooth coverage and maximum low-frequency impact with all drivers active at the lowest frequencies and each rolling off, one at a time, via the integral active crossover. This technique eliminates interference between drivers that would otherwise occur at shorter wavelengths, enabling the system to maintain ideal polar, phase, and frequency responses throughout the low and low-mid operating ranges. As a result, the system can deliver the necessary power to completely fill a large theater with rich, clean sound, thereby ensuring that the full intensity and nuance so carefully crafted into today’s movie soundtracks reach every listener without compromise.

The Acheron LF was designed exclusively for use with Acheron loudspeakers. The Acheron LF’s 37 Hz to 370 Hz operating frequency range and 133 dB linear peak SPL were carefully chosen to compliment the Acheron. The Acheron LF also features the same high-power 15-inch cone driver used in the low frequency section of the Acheron. Engineered to deliver optimum performance, the high-excursion, back-vented drivers include 4-inch voice coils and are housed in a tuned, vented enclosure that shares the same rectangular footprint as the Acheron.

The Acheron LF is powered by an onboard two-channel class AB/H amplifier with complementary MOSFET output stages. Total output power is 2250 W (4500 W peak) and provides the system with enough headroom to easily accommodate the extreme demands of digital soundtracks.

The optional RMS™ remote monitoring system allows comprehensive monitoring of system parameters from a host computer running Compass® software.

Strategically placed 3/8-inch threaded points on the side corners of the Acheron LF cabinet allow the unit to be mounted to floors with optional mounting brackets. The Acheron 100 and Acheron 80 can be mounted on top of the Acheron LF with uptilt or downtilt with optional stacking brackets.

Specifications

ACOUSTICAL1

Acheron 80

Acheron 100

Acheron LF

Operating Frequency Range 2

37 Hz – 18 kHz

37 Hz – 18 kHz

37 Hz – 370 Hz

Frequency Response 3

38 Hz – 17 kHz ±4 dB

38 Hz – 17 kHz ±4 dB

38 Hz – 340 Hz ±4 dB

Phase Response

700 Hz – 17 kHz ±30°

700 Hz – 17 kHz ±30°

60 Hz – 230 Hz ±30°

Linear Peak SPL 4

135 dB with crest factor of

18.5 dB (M-noise), 134 dB (Pink noise), 136 dB (B-noise)

134 dB with crest factor of 18 dB (M-noise),

133.5 dB (Pink noise), 135 dB (B-noise)

133 dB with crest factor

> 11 dB (M-noise), 133 dB (Pink noise), 133 dB (B-noise)

COVERAGE

Horizontal Coverage

80°

100°

N/A

Vertical Coverage

50°

N/A

CROSSOVER

 

580 Hz5

200 Hz6

TRANSDUCERS

Low Frequency

One high-power 15-inch cone driver with neodymium magnet; 4 Ω nominal impedance

Two high-power 15-inch cone drivers with neodymium magnets; 4 Ω nominal impedance

High Frequency

One 4-inch diaphragm compression driver; 8 Ω nominal impedance

AUDIO INPUT

Type

Differential, electronically balanced

Maximum Common Mode Range

±15 V DC, clamped to earth for voltage transient protection

Connectors

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

Input Impedance

10 kΩ differential between pins 2 and 3

Wiring

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

Nominal Input Sensitivity

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

Input Level

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.

AMPLIFIER

Type

Two-channel with complementary MOSFET output stages (class AB/H)

Total Output Power7

3370 W peak

4500 W peak

THD, IM, TIM

< 0.02%

Cooling

Forced air cooling, two internal fans (one ultra low-speed fan, one reserve fan)

AC POWER

Connector

250 V NEMA L6-20 (twistlock) inlet or IEC 309 male inlet

Automatic Voltage Selection

Automatic, two ranges, each with high-low voltage tap (uninterrupted)

Safety Rated Voltage Range

95–125 V AC; 208–235 V AC, 50/60 Hz

Turn-on and Turn-off Points

85–134 V AC; 165–264 V AC

CURRENT DRAW

Idle Current

0.71 A rms (115 V AC); 0.38 A rms (230 V AC); 0.79 A rms

(100 V AC)

0.64 A rms (115 V AC); 0.32 A rms (230 V AC); 0.85 A rms

(100 V AC)

Maximum Long-Term Continuous Current

(>10 sec)

5.8 A rms (115 V AC); 2.8 A rms (230 V AC); 6.3 A rms

(100 V AC)

8.8 A rms (115 V AC); 4.4 A rms (230 V AC); 10.0 A rms

(100 V AC)

Burst Current (<1 sec)8

6.4 A rms (115 V AC), 3.2 A rms (230 V AC), 7.2 A rms

(100 V AC)

19.0 A rms (115 V AC), 9.5 A rms (230 V AC), 22.0 A rms

(100 V AC)

Maximum Instantaneous Peak Current

26 A peak (115 V AC), 14 A peak (230 V AC), 28 A peak

(100 V AC)

39 A peak (115 V AC), 20 A peak (230 V AC), 45 A peak

(100 V AC)

Inrush Current

7 A peak (115 V AC), 7 A peak (230 V AC), 10 A peak (100 V AC)

7 A peak (115 V AC), 7 A peak (230 V AC), 10 A peak

(100 V AC)

RMS NETWORK (OPTIONAL)

 

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

PHYSICAL

Dimensions

W: 31 in (787 mm) x H: 35 in (889 mm) x D: 20.5 in (521 mm)

W: 31 in (787 mm) x H: 36.18 in (919 mm) x

D: 20.5 in (521 mm)

Weight

173 lb (78.5 kg)

185 lb (83.91 kg)

Enclosure

Premium multi-ply birch with slightly textured black finish

Protective Grille

Powder-coated, hex-stamped steel with black mesh

Rigging

3/8-inch threaded points on side corners for optional bracket adapters that 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)