JBL MPC-XU, Owner'S Manual And Installation Manual

7

MPC-XU

2-Way Active Crossover

This configuration routes the frequencies below a particular frequency to amplifier Channel 1,

which will driver the low-frequency speaker(s), and the frequencies above to Channel 2, which

will drive the high-frequency speaker(s). Using the MPC-XU as a crossover requires that you

drive both amplifier inputs with the same full-band signal.
Program settings:
1 On the input module, set the amplifer mode to parallel. Alternately, you could use a Y-

cable to provide the same signal to both channel inputs.

Channel 1:

2 Set J101 to enable the Channel 1’s low-pass filter by placing jumper 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 Subsonic (infrasonic) filter—If you need subsonic (infrasonic) filtering, set J102 to enable

the high-pass filter by placing jumper across pins 2 and 3, and insert a resistor network into

RN104 corresponding to the roll-off  frequency you desire. If you do not want subsonic

(infrasonic) filtering, set J102 to disable the high-pass filter by placing jumper across pins 1

and 2.

Channel 2:

6 Set J202 to enable the Channel 2’s high-pass filter by placing jumper across pins 2 and 3.
7 Insert a resistor network into RN204 that is appropriate to the desired crossover frequency.
8

CD horn EQ

—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

Ultrasonic filtering

—If you need ultrasonic filtering, set a jumper on J201 across pins 2 and 3

to enable Channel 2’s Low-pass filter 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 across pins 1 and 2 to bypass the low-pass filter.

Multi-way Crossover System

The MPC-XU 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 MPC-XU. You must feed each amplifier

with the same full-range signal and use the MPC-XU to filter the signals in the individual channels.

Each MPC-XU should be configured in the bandpass filter configuration as described above.