Atomic ACLR-AC Owner's Manual page 5

S Y S T E M D E S C R I P T I O N
The Atomic CLR is a two-way coincident loudspeaker consisting of
a heavy-duty, horn-loaded 12" cone transducer for low frequencies
and a high-output, 1"-exit compression driver with a 1.75" voice coil
driving a constant-directivity type horn for high frequencies. The
enclosure is constructed of 12-ply, void-free plywood throughout,
with internal structural details that serve both to form the low-
frequency horn shape and to add substantial structural rigidity.
Non-powered versions of the CLR incorporate a heavy-duty passive
crossover designed to optimize amplitude response and preserve
the integrity of transient signals. Powered versions include two
independent channels of power amplification - one each for low
and high frequencies - and a line-level active crossover that
employs digital signal processing. The power amplifier topology is
a patented, high-performance variation on Class D that has found
use in a number of expensive, audiophile-quality loudspeakers.
The DSP filtering is designed to optimize both amplitude and
transient response and is equipped with special features designed
to minimize the chances of driver damage due to operation at
excessive levels.
Active CLRs provide user-selectable presets for three common
acoustic boundary conditions: free-field, tilt, and backline. The
freefield setting is optimized for use when the speaker is elevated
off the floor on a pole or stand; the tilt setting is optimized for use
as a floor wedge, with the speaker on the floor aimed up at the
player; and the backline setting is optimized for placement of the
speaker on the floor and aimed horizontally, as is common for guitar
amp usage. There is also a switchable 120-Hz highpass filter for
use with a subwoofer or for removal of unwanted low frequencies.
Refer to the panel diagram for more features.
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