ISP Technologies SB 112 - Manual (Page 6)

SUBWOOFER POWER:
The HDDS system distributes low voltage Alternating Current over the CAT6 cable plus
high level balanced audio and is capable of greater than 220 watts continuous power
per HDDS SB112 subwoofer. Each of the three outputs A, B and C are capable of
delivering up to 7 amps of output current. The current consumption at full power will
require over 4 Amps of power per subwoofer. In order to allow the full 220 watts of
power do not exceed 50 feet of cable length or connect a second run of CAT6 cable
between the Master Control Module and the HDDS SB112 subwoofer. The CAT6 cable
will start to limit the total power of the HDDS SB112 once you exceed 50 feet of cable.
CAT6 Connections
The figure below shows the connections for each output A, B and C of each zone output
on the Master Control Module and also connections between each HDDS SB112
subwoofer. Connections are done via standard CAT6 cables where pins 1 through 8 are
connected common to the same pins 1 through 8 at each end. As shown below two
wires in the Cable are used for balanced audio and 6 wires are used for power with two
providing ground and two for each of two 22VAC power signals fed down the cable.