At the heart of Meyer Sound's EXP line of cinema products are the Acheron™ high-performance screen channel loudspeakers. The Acheron Studio is a compact version of the Acheron 80, making it ideal for small theatres, re-recording stages, and postproduction facilities. 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, center, and right sound channels for cinema. Offering the same 38 Hz to 17 kHz frequency response as the Acheron 80, as well as a generous peak output with very low distortion, the Acheron Studio stands up to the most demanding of digital soundtracks, maintaining a wide dynamic range and full fidelity.
The Acheron Studio uses the same horn technology (patent pending) developed for the Acheron 80. Designed specifically for cinema use, the horn features a very soft roll-off outside its extremely well behaved 80-degree horizontal by 50-degree vertical coverage pattern. The horn is fixed within the enclosure to ensure an accurate acoustic crossover, phase response, and an incredibly consistent vertical pattern. The 580 Hz 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 Studio's drivers include one 15-inch lowfrequency cone driver and one high-frequency 4-inch diaphragm compression driver. Both drivers yield uncompromising quality and full bandwidth and are powered by sophisticated onboard amplification. The proprietary Meyer Sound power amplifier is a two-channel, class AB/bridged amplifier with complementary MOSFET output stages that yields a total output of 700 W (1,400 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. Constructed of premium birch plywood, the Acheron Studio enclosure is coated with a low-gloss, black-textured finish. An optional version of the loudspeaker is available with side rigging attachment points and the MYA-AST mounting yoke.
- High peak power output with ultralow distortion
- Exceptional fidelity and extended highfrequency performance
- Constant-Q horn yields uniform response throughout coverage area
- Extraordinarily flat amplitude and phase response for tonal accuracy
- Seamless integration with HMS-10 surround loudspeakers and X-800C subwoofer
- Small theatres
- Custom, private theatres
- Re-recording stages
- Mixing for postproduction facilities
Acoustical Operating Frequency Range37 Hz – 18 kHzFrequency Response38 Hz – 17 kHz ±4 dBPhase Response700 Hz – 17 kHz ±30°Maximum Peak SPL134 dBDynamic Range>110 dBCoverage80° horizontal x 50° verticalCrossover580 HzTransducers Low Frequency15" low-frequency cone driver
Nominal impedance: 2 Ω
Voice coil size: 3"
Power handling capability: 400 W (AES)High Frequency4" compression driver
Nominal impedance: 8 Ω
Voice coil size: 4"
Diaphragm size: 4"
Exit size: 1.5"
Power handling capability: 250 W (AES)Audio Input TypeDifferential, electronically balancedMaximum Common Mode Range±15 V DC, clamped to earth for voltage transient protectionConnectorsFemale XLR input with male XLR loop outputInput Impedance10 kΩ differential between pins 2 and 3WiringPin 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 chassisDC BlockingDifferential DC blocking up to the maximum common mode voltageCMRR>50 dB, typically 80 dB (50 Hz – 500 Hz)RF FilterCommon mode: 425 kHz; Differential mode: 142 kHzTIM FilterIntegral to signal processing (<80 kHz)Nominal Input Sensitivity10 dBV (3.2 V rms, 4.5 V peak) continuous is typically the onset of limiting for noise and musicInput LevelAudio source must be capable of producing +20 dBV (10 V rms, 14 V peak) into 600 Ω to produce the maximum peak SPL over the operating bandwidth of the loudspeakerAmplifier TypeTwo-channel complementary MOSFET output stages (class AB/bridged)Output Power700 W (1 x 550 W, 1 x 250 W)Total Output1400 W peakTHD, IM, TIM<.02%Load2 Ω low channel; 8 Ω high channelCoolingConvectionAC Power ConnectorPowerCon®Voltage SelectionAutomatic, continuous range from 90 V AC to 265 V ACSafety Agency Rated Operating Range100–240 V AC, 50/60 HzTurn-on and Turn-off Points90 V AC on, no turn-off, only fuse-protect above 265 V ACCurrent Draw: Idle Current
Maximum Long-Term Continuous Current (>10 sec)
Burst Current (<1 sec)7
Ultimate Short-Term Peak Current Draw
Inrush Current0.340 A rms (115 V AC); 0.227 A rms (230 V AC); 0.387 A rms (100 V AC)
2.2 A rms (115 V AC); 1.1 A rms (230 V AC); 2.5 A rms (100 V AC)
2.9 A rms (115 V AC); 1.5 A rms (230 V AC); 3.3 A rms (100 V AC)
7.4 A peak (115 V AC); 3.7 A peak (230 V AC); 8.5 A peak (100 V AC)
11 A peak (115 V AC); 18 A peak (230 V AC); 13 A peak (100 V AC)RMS Network (Optional)Equipped with two-conductor twisted-pair network, reporting all operating parameters of amplifiers to system operator’s host computerDimensions25.38" w x 30.78" h x 16.79" d
(406 mm x 782 mm x 426 mm)Weight113 lbs (51.26 kg)EnclosurePremium birch plywoodFinishLow gloss, black texturedRiggingOptional version of the Acheron Studio available with side attachment points and MYA-AST mounting yoke