Rear Panel
The rear panel includes two RJ45 connectors one for input and one for output. The
SM650 also includes a level control and a power jack that allows connection to an
external 18VAC power adaptor available from ISP Technologies. Connect the input to
the output connector on a HDDS Master Control Module. A Cat5 cable is used to
connect the output connector to another SM650 or to connect to any other ISP
Technologies HDDS powered speaker. The power connection on the back of the
SM650 can be used to power the speaker as a stand-alone speaker or can also be used
to add additional power if a long run of Cat5 cable is used. The system is designed to
allow both the Cat5 cable to supply power plus the external adaptor at the same time
without the risk of damage. The internal power supply will simply derive power for the
power source with the highest voltage available.
The SM650 will typically pull less than 500 milliamps of current from the output of the
Master Control Module with typical listening levels. At maximum level the SM650 can
pull in excess of 1 amp of current. If maximum output power is desired it is
recommended to limit the number of serially connected SM650 speakers on a single
50ft run of Cat5 cable to no more than 5 speakers. With longer runs of cable the limit
will be reduced in order to achieve full output power. Connect the SM650 to any of the
A,B or C outputs on the rear of the HDDS Master Control Module as shown below.
