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© 2003 TDM Audio, Inc. Electronic Crossover Owner’s Manual Page 12
It is very important that both pins 1 and 3 are wired to the sleeve. Some adapters leave pin 3
floating, and with TDM crossover units this will cause problems.
If you have a TDM 24CX series crossover with ¼” connectors, you may connect directly to
other equipment using ¼” connectors whether the other equipment is balanced or not. If you
wish to connect a TDM 24CX series crossover with ¼” connectors to another piece of equipment
that has XLR connectors, and you are making the adapters yourself, use tip-ring-sleeve type ¼”
phone plugs, and wire them this way.
• Wire pin 1 of the XLR connector to the sleeve of the tip-ring-sleeve plug.
• Wire pin 2 of the XLR connector to the tip of the tip-ring-sleeve plug.
• Wire pin 3 of the XLR connector to the ring of the tip-ring-sleeve plug.
The Basic Hook-Up
Begin by connecting the unit to a power source. Turn the power switch off. The power switch is
located near the power cord at the rear of the unit. It is off when it is in the “out” position.
Pressing the switch toggles it between off and on states. Next, plug the power cord that emerges
from the back of the unit into an electrical outlet capable of supplying the correct voltage,
current, and frequency. This information is printed on the rear panel of your TDM 24CX series
crossover. Leave the unit turned off until all connections are made and you are ready to operate
the unit.
The normal way to connect a crossover is between your sound signal source and your amplifiers.
For each channel, the output of the signal source that would ordinarily feed the amplifier is fed
into the crossover instead. The crossover outputs for each band are then fed into separate
amplifiers and each amplifier drives a different set of speaker components (subs, mid-frequency
drivers, horns, etc.)
Two-Way Operation (24CX-2 or 24CX-4)
The 24CX-2 provides two channels for two-way operation. The 24CX-4 provides four channels
for two-way operation. The hookup procedure is the same regardless of which channel you use.
Feed a line level signal source (from your mixer, equalizer, or whatever) into the input of the
channel. Connect the low output of the channel to the input of your low amplifier. If desired, one
or more “Y” cables may be used to connect this output to the inputs of several amplifiers.
Connect the high output of the channel to the input of your high amplifier. Again, more than one
amplifier may be used if desired.
Three-Way Operation (24CX-2 or 24CX-4)
The 24CX-2 provides one channel for Three-way operation. The 24CX-4 provides two channels
for three-way operation. In the 24CX-2 the two channels are combined to make a single three-
way channel. In the 24CX-4, channels one and two are combined to make one three way
channel, and channels three and four are combined to make another three-way channel. The
hookup procedure is the same for either unit. Press the channel link switch between the two-way