Avalon Acoustics AVALON SYMBOL Subwoofer And Center Channel - Manual (Page 5)

5
Signal Input
Left and right balanced and single-ended inputs are provided. Most 5.1 surround sound
processors provide a single subwoofer output connection. This may be either single
ended or balanced. Only ONE (left or right) of these connections needs to be utilized for
proper performance. Certain sophisticated installations may contain stereo subwoofer
output capabilities (e.g. when using a high-end stereo preamplifier to drive a two-
channel system). In such cases, both left and right inputs of The Symbol Subwoofer
should be utilized. If single-ended connections are used, the supplied XLR dummy plugs
should be installed in order to reduce air leakage. If a single balanced input is used, a
dummy XLR connector should fill the remaining balanced input port. ALL CONNECTIONS
SHOULD BE MADE BEFORE TURNING THE UNIT ON!
Controls
Once all connections have been made, the unit is powered up with the large rocker
switch at the bottom center of the amplifier panel. Upon initial power up a transient
“pop” may be heard as the unit charges; this is normal. There are no user serviceable
parts behind the amplifier panel.
After power up the digital display signifying the master gain setting will initialize and
display the previously stored settings (see below). The gain range is variable in (.5) step
increments from (45-90). Most optimal setups will fall into a range below (70) and greater
than (65). Master gain adjustments are made by pressing either the INCREASE or
DECREASE buttons.
If you would like to MUTE the Subwoofer, depress the INCREASE and DECREASE buttons
SIMULTANEOUSLY (this function should be utilized unless the unit is to be disconnected).
This will initiate a two-step process. The first step saves the current master gain setting
and the state of the low frequency filters (CONTOUR and MODE settings). This process is
confirmed by a series of four dashes (----) shown on the numeric display. The unit will then
proceed to enter the standby mode. To “wake up” or reactivate the unit, depress the
MODE button. This will cause the previously stored values to be recalled and the unit will
be returned to an operational state.
If the mains power is interrupted by either an actuation of the mains power switch or from
an interruption of the mains power itself, upon reapplication of the mains power, the unit
will initiate its recall sequence and return the unit to the previously saved state (see
above). The single mains fuse should be replaced by one of equal value if there is a
failure. Any service beyond the replacement of the AC mains fuse should be referred to
an authorized Avalon MultiChannel Systems representative.