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6
PLACEMENT
The SRS1500 subwoofer is designed to
sit on the floor or on sturdy stands.
A socket is provided on the top of the
SRS1500 for mounting the Mackie
SRM450 active speaker. Use the optional
Mackie speaker mounting pole to mount
the SRM450 on the SRS1500 (see Hookup
Diagram on page 5).
As with any powered
components, protect
them from moisture. If
you are setting them up
outdoors, make sure they
are under cover if you
expect rain.
CONNECTIONS
Balanced XLR Connectors
The SRS1500 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
If connecting an unbalanced signal to the
SRS1500 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.
Unbalanced Male XLR Connector
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 SRS1500 to your
system. Simply plug the signal source (i.e.,
mixer output) into the first speaker’s
FULL
RANGE INPUT
jacks, and patch that speak-
er’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). See the diagrams
on the rear panel of the SRS1500 for addi-
tional connection information.