JBL 1014 Connecting Your Subwoofer To Your Amplifier, Parallel connection, Series connection

CONNECTING YOUR SUBWOOFER TO YOUR AMPLIFIER

JBL Grand Touring Series GTO subwoofers are available in two different configurations: a single 4-ohm voice coil or dual 4-ohm voice coils. You may use GTO subwoofers in singles or multiples to maximize the power available from your amplifier(s). To achieve the maximum amplifier output

2. You may connect the coils of a

dual-voice-coil woofer in series,

but we recommend that you avoid

connecting separate woofers in

series.

3. You must use both coils of a dual-

voice-coil woofer connected

either in series or in parallel.

To design a subwoofer system that maximizes available amplifier power, keep the following rules in mind:

1.The total system impedance of woofers in parallel can be calculated using the formula:

Figure 1. Parallel connection

possible, you should design a

Impedance =

1

Figure 2. Series connection

speaker system that provides the lowest impedance that your amplifier will drive safely. When designing a subwoofer system, consider the following rules:

1.Do not mix different subwoofers or enclosure types in the same system. Subwoofers being used in the same enclosure or powered by the same amplifier should

be identical models. Mismatched woofers and enclosures can result in poor performance from your subwoofer system.

4. Most amplifiers deliver exactly

the same amount of power

bridged into a 4-ohm load

as they do running a 2-ohm

stereo load.

w11 + w12 + w13 ...

where w is the nominal impedance of the woofer.

2.The total system impedance of voice coils (or woofers) in series can be calculated using the formula:

Impedance = w1 + w2 + w3 ...

The diagrams at right show parallel and series speaker connections.

3