6
CONNECTIONS
The SWA1801 has two female XLR in-
puts that accept a balanced line-level signal.
When connecting a balanced signal, be sure
it’s wired per AES (Audio Engineering So-
ciety) standards:
XLR
Hot (+)
Pin 2
Cold (–)
Pin 3
Shield (Ground)
Pin 1
Balanced XLR Connectors
If connecting an unbalanced signal to the
SWA1801 balanced input, be sure that the
signal high (hot) connection is wired to Pin 2
and the unbalanced ground connection is
wired to the low
and
the ground connec-
tions of the balanced input (Pins 3 and 1).
If there are ground-loop problems, try con-
necting the unbalanced ground connection
only to the input low connection (Pin 3),
and leaving the input ground connection
disconnected.
There are also four male XLR connec-
tors labeled
THRU (FULL RANGE OUTPUT)
and
HIGH PASS (MID/HIGH FREQ) OUTPUT
.
These are also wired according to the
AES standard.
The
THRU
output connectors allow you
to connect more than one SWA1801 to
your system. Simply plug the signal source
(i.e., mixer output) into the first speaker’s
FULL RANGE INPUT
jacks, and patch that
speaker’s
THRU
jacks to the next speaker’s
INPUT
jacks, and so on, daisy-chaining
multiple speakers.
The
THRU
jack is wired straight from the
FULL RANGE INPUT
connector — there is
no electronic circuitry between — so the
signal coming out of the
THRU
jack is ex-
actly the same as the signal going in.
The
HIGH PASS OUTPUT
jacks provide a
line-level signal of the frequencies above
120Hz that you connect to a pair of active
speakers (or to a stereo amplifier powering
a pair of passive speakers).
PLACEMENT
The SWA1801 subwoofer is designed to
sit on the floor. A socket is provided on the
top of the SWA1801 for mounting the
Mackie SA1521 or SRM450 active speak-
ers. Use the optional Mackie speaker
mounting pole (SPM100) to mount them
on the SWA1801 (see Hookup Diagram on
page 5).
As with any powered
components, protect the
SWA1801s from exposure
to moisture. If you are
setting them up outdoors,
make sure they are under
cover if you expect rain.
WARNING
: The cabinet
has no rigging points and
is not suitable for rigging.
NEVER
attempt to sus-
pend the SWA1801 by its
handles.
Unbalanced Male XLR Connector
