Sunfire HRS-12 - Manual (Page 5)

User's Manual
5
Overview
The Sunfire HRS subwoofers are
designed to give you the best possible
low-frequency sound quality for your
Home Theater and music playback expe-
rience. They incorporate a tremendously
powerful built-in amplifier to produce
tight, seismic, denture-rumbling bass that
you can feel as well as hear.
There are three models in the high
resolution series: the HRS-8, HRS-10,
and the HRS-1. (The number represents
the driver diameter in inches.) The control
panel, connections and operation are the
same for each subwoofer model, and this
manual covers all three models.
Each subwoofer has controls for adjust-
ing the crossover frequency, phase, and
volume. They also have line-level and
speaker-level inputs for easy incorpor-
ation into existing systems, or as part of a
subwoofer/satellite speaker combination.
The Driver
To have lots of bass requires the move-
ment of lots of air. To achieve this, the
subwoofer's driver has been designed to
travel back and forth approximately five
times further than a normal driver. This
gives lots of air movement and massive
bass performance.
The Tracking Downconverter
Amplifier
The large movement range of the driver
generates greater air pressure inside the
box than a conventional driver. In order
to create this range of movement, we
designed a drive amplifier that is much
more powerful than an ordinary amplifier.
A signal compressor circuit kicks in
automatically if the input signal level
reaches a level that would overload the
driver. This maintains a ceiling on the
output without clipping.
If the input signal is driven even further,
a ‘soft clipping’ circuit is enabled. This
allows the driver to put more sound into
the room to satiate the power hungry
user, but without distortion or damage to
the driver. This produces extremely high
sound pressure levels (SPL) in your room
without the driver banging against its
mechanical stops.
Sub/LFE
In this manual, the term “Sub/LFE” is
used to denote the subwoofer or Low
Frequency Effects output, commonly
found on Home Theater processors and
receivers.