ACHERON OPERATING INSTRUCTIONS
9
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 the-
atres. The self-powered Acheron LF with dual 15-inch driv-
ers boosts the headroom on the LCR channels by
converting each Acheron loudspeaker to a system with
three low-frequency drivers in an aligned column.
The unique multi-way, gradated design offers smooth cover-
age 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 elimi-
nates interference between drivers that would otherwise
occur at shorter wavelengths, enabling the system to main-
tain ideal polar, phase, and frequency responses throughout
the low and low-mid operating ranges. As a result, the sys-
tem can deliver the necessary power to completely fill a
large theatre with rich, clean sound, thereby ensuring that
the full intensity and nuance so carefully crafted into today’s
movie soundtracks reach every listener without compro-
mise.
The Acheron LF was designed exclusively for use with
Acheron loudspeakers. The Acheron LF's 37 Hz to 370 Hz
operating frequency range and 136 dB maximum peak SPL
(at 1 meter) 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 com-
prehensive monitoring of system parameters on a Windows-
based computer.
Strategically placed 3/8-inch threaded points on the side
corners of the Acheron LF cabinet allow the unit to be
secured to floors with the optional mounting brackets. An
Acheron can be mounted on top of the Acheron LF with
uptilt or downtilt using the optional stacking brackets.
Acheron LF Screen Channel Loudspeaker
Acheron LF with Acheron 80