Acheron LF

Specifications

Operating Frequency Range: 37 Hz – 370 Hz
Frequency Response: 38 Hz – 340 Hz ±4 dB
Phase Response: 60 Hz – 230 Hz ±30°
Linear Peak SPL: 133 dB with crest factor > 11 dB (M-noise), 133 dB (Pink noise), 133 dB (B-noise)

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.

Type: Two-channel with complementary MOSFET output stages (class AB/H)
THD, IM, TIM: < 0.02%
Cooling: Forced air cooling, two internal fans (one ultra low-speed fan, one reserve fan)

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

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)