Meyer Sound 80 - Manual (Page 39)

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APPENDIX B: ACHERON LF SPECIFICATIONS
Acheron LF Specifications
ACOUSTICAL
Operating Frequency Range 37 Hz – 370 Hz
Note: Recommended maximum operating frequency range. Response depends on loading
conditions and room acoustics.
Frequency Response 38 Hz – 340 Hz ±4 dB
Note: Measured free field with 1/3 octave frequency resolution at 4 meters.
Phase Response 60 Hz to 230 Hz ±30°
Maximum Peak SPL 136 dB
Note: Measured free field with music referred to 1 meter. SPL for the Acheron LF calibrated to
complement the Acheron 80 and Acheron 100 in the common frequency range.
Dynamic Range >110 dB
Crossover 200 Hz
Note: Below this frequency, both Acheron LF transducers are active. Above this frequency,
one transducer rolls off to avoid interactions in the higher frequencies (shorter wavelengths) of
the Acheron 80 and Acheron 100.
TRANSDUCERS
Low Frequency Two high-power 15” cone drivers with neodymium magnets
Nominal impedance: 4
Ω
Voice coil size: 4”
Power-handling capability: 1200 W (AES) each
Note: Power handling measured using AES standards: transducers driven continuously for
two hours with a band limited noise signal having a 6 dB peak-average ratio.
AUDIO INPUT
Type Differential, electronically balanced
Maximum Common Mode Range ±15 V DC, clamped to earth for voltage transient protection
Connectors Female XLR input with male XLR loop output
Input Impedance 10 k Ω differential between pins 2 and 3
Wiring Pin 1: Chassis/earth through 220 k Ω, 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
DC Blocking None on input, DC block through signal processing
CMRR >50 dB, typically 80 dB (50 Hz – 500 Hz)
RF Filter Common mode: 425 kHz
Differential mode: 142 kHz
TIM Filter <80 kHz, integral to signal processing
Nominal Input Sensitivity 10 dBV (3.2 V rms, 4.5 V peak) continuous is typically the onset of limiting for noise and music
Input Level Audio source must be capable of producing +20 dBV (10 V rms, 14 V peak) into 600
Ω to pro-
duce the maximum peak SPL over the operating bandwidth of the loudspeaker
AMPLIFIER
Type Complementary MOSFET output stages (class AB/H)