2-Way, 3-Way
4-Way Crossovers
223/223XL - 234/234XL
234/234XL-223/223XL R
EAR
P
ANEL
O
PERATIONS
M
ODE
S
WITCHES
234XL R
EAR
P
ANEL
234 R
EAR
P
ANEL
The mode switches on the back panel of the unit are used to select one
of the three modes of operation in the 234/234XL and one of two modes
of operation in the 223/223XL. There could be disastrous consequences
if the crossover were improperly setup or the switches were mistakenly
pushed during the regular operation of a sound system. Therefore great
care should be taken when setting these switches. There is a mode dia-
gram on the back panel to help you understand at a glance how this is
done. The following steps should be taken in setting up your system:
• Know the loudspeaker manufacturer’s requirements regarding the
amplification needs of your particular speaker system. Follow the
maunfacturer’s guidelines carefully, as dbx is not responsible for dam-
age relating to improper setup or implementation of the 234/234XL-
223/223XL.
• Without any audio or power connections in place, use the back panel
switches on the crossover to set it to the proper mode of operation;
either stereo 2-way, stereo 3-way, or mono 4-way for the 234/234XL,
or stereo 2-way or mono 3-way for the 223/223XL.
• Use the literature that came with your speaker system to properly set
up the mode of operation and crossover frequencies to the manufac-
turer’s specifications.
• There is one of the four possible mode button combinations for the
234/234XL which is marked “not valid”. Be sure you have not select-
ed this combination as the 234/234XL will not operate correctly in this
mode.
When you are certain that the proper selections have been made, com-
plete the steps described below and in the “234/234XL-223/223XL Audio
Connections” section on page 7.
6
®
CHANNEL TWO
MODE
MID
HIGH-MID
x 1
x 10
HIGH
HIGH
LOW
NOT USED
INPUT
NOT USED
CHANNEL ONE
HIGH
LOW/MID
NOT USED
HIGH
STEREO 3-WAY
MONO 4-WAY
STEREO 2-WAY
LOW
INPUT
LOW/HIGH
NOT USED
NOT USED
MID
LOW-MID
LOW/MID
LOW/LOW-MID
x 1
x 10
STEREO 3-WAY
STEREO 2-WAY
MONO 4-WAY
NOT VALID
LOW/LF SUM
LOW
INPUT
HIGH
NOT USED
LOW/HIGH
LOW/LF SUM
INPUT
INPUT
LF SUM
LOW SUM
LOW SUM
NORMAL
SUMMED
ONLY
A HARMAN INTERNATIONAL
COMPANY
SALT LAKE CITY, UTAH
MADE IN USA
MODEL 234
®
PROFESSIONAL PRODUCTS
XOVER FREQ
XOVER FREQ
15 WATTS
100V 50/60Hz
120V 60Hz
