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user manual
TXD series
Bi-amplified operation
TXD series two-way loudspeakers can also be operated in bi-amplified mode together with any of
the available bass enclosures, in order to give enhanced audio performance and greater overall
sound pressure level. In this case one amplifier will power the full range loudspeakers, while
another is required to power the bass cabinets. An external 2-in, 4-out crossover, such as the LMS-
D4 digital loudspeaker management system, is required with a crossover frequency at 150Hz.
To operate TXD systems in bi-amplified mode, it is necessary to bypass the passive crossover in
the bass cabinet. To do this, undo the four screws holding the pole mount socket in place, and
firmly pull the pole mount out of the cabinet together with the passive crossover selection wiring.
In the case of the TXD-215, remove the lower side pole mount.
BI-AMP
(BY-PASS PASSIVE
CROSSOVER)
PASSIVE
Mode selection is determined by the position of the wire links on the connector block. To bypass
the internal passive crossover, connect the yellow link wire from the red to the black as shown in
the diagram above and replace the pole mount in the cabinet.
TXD-121
LIMIT
-24
MUTE
RS-232
< BACK NEXT >
MENU ENTER
SCROLL
CLIP
A B 1 2 3 4
_
+
-
AMPLIFIER
Channel B
+
_
Pin 1 GND.
Pin.2.
Pin 3
Output Link Input Input Channel A
Pin 1 GND.
+
Pin 3
Pin 2
_
Link
+
Output
_
+
+
Pin 1 GND.Pin 1 GND.
AMPLIFIER
+
_
Pin.2.
Pin 3
Pin 2
Pin 3
_
-
Channel BOutput Link Input Input Channel ALink Output
+
TXD-121
TXD-115 TXD-115
LMS D4
HIGH
LOW
TXD series manual
page 13