JBL GTS600, GTS300 manual Custom “Chip” Construction, Resistor 2,500,000

Regardless of whether you build or buy it, the necessary resistor network has the following configuration:

Custom “Chip” Construction

•To build “chips” from discrete resistors, solder the resistores to a standard 14-pin “DIP Head” according to the diagram. If a DIP Header is not available, you may bend the leads of 1/4 watt resistors 90 degrees, trim them to 3mm-length, and insert them directly into the chip sockets.

To change the crossover frequency change the resistor network as follows:

1.Remove the screws from the bottom panel as shown below.

•Each resistor in the package has the same value.

•If you kvow the crossover frequency you want, you can calculate the resistor value necessary by solving the following equation:

Resistor 2,500,000

Value = Crossover

in Ohms Frequency in Hz

•Use the following equation if you have a resistor pack of a known value, and want to find it’s crossover frequency:

Crossover 2,500,000 Frequency = Crossover

in Hz Resistor Value in Ohms

2.Select which resistor module, high pass or low pass, that you wish to change.

3.A chip puller, wich can be obtained from any electronics store, is used to remove the resistor chip. Pull the resistor chip from the socket as shown in figur below.

4.Place the new module in the socket making sure all pins are lined up with the socket holes. Press the module firmly into the socket.

5.Replace the bottom lid.

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