7
Program settings:
1. On the input module, set the amplifier mode to parallel. Alternately, you could use a Y-
cable to provide the same signal to both channel inputs.
Steps 2 through 5 configure Channel 1.
2. Jumper J101 to enable Channel 1’s low-pass filter (across pins 2 and 3).
3. No jumper on J103.
4. Insert a resistor network into RN102 that is appropriate to the desired crossover
frequency.
5. If you need subsonic filtering, set a jumper on J102 to enable Channel 1’s high-pass filter
(across pins 2 and 3) and insert a resistor network into RN104 that corresponds to the
roll-off frequency you desire. If you do not want subsonic filtering, set J102 to bypass the
high-pass filter (across pins 1 and 2).
Steps 6 through 9 configure Channel 2.
6. Set J202 to enable Channel 2’s high-pass filter.
7. Insert a resistor network into RN204 that is appropriate to the crossover frequency you
set in #4.
8. If you need equalization for a constant-directivity horn, set a jumper on J203 for the
amount of boost you need. If you do not want CD horn equalization, do not place any
jumper on J203.
9. If you need ultrasonic filtering, set a jumper on J201 to enable Channel 2’s low-pass filter
(across pins 2 and 3) and insert a resistor network into RN202 that corresponds to the
desired roll-off frequency. If you do not want any ultrasonic filtering, set the jumper on
J201 to bypass the low-pass filter (across pins 1 and 2).
Multi-way Crossover System
The UF-2 allows you to set up 3- and even 4-way systems. Of course, this also requires that you use more
than one amplifier and more than one UF-2. The other basic requirement of using the UF-2 as a crossover
is that you must feed each amplifier with the same full-range signal and use the UF-2 to filter the signals
in the individual channels.
Figure 8 depicts an example of a 4-way system. Because of the multitude of possible system configurations,
the fundamentals of the technique used in the example will be explained below, with a few specifics. The
actual crossover frequencies you should use will depend on your speaker system.
