JBL manual Connecting Your Subwoofer to Your Amplifier, GT5-12 subwoofer has a single

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CONNECTING YOUR SUBWOOFER TO YOUR AMPLIFIER

The GT5-12 subwoofer has a single

4-ohm voice coil. Be sure to consider your amplifier’s optimum load when designing a subwoofer system. Many bridgeable 2-channel amplifiers are optimized to drive a single 4-ohm woofer in bridged mode. If you will use multiple woofers, be sure to configure them to extract all the power available from your amplifier.

2.

Most amplifiers deliver exactly

 

the same amount of power

 

bridged into a 4-ohm load

 

as they do driving a 2-ohm

 

stereo load.

3.

If you are designing a multiple-

 

woofer system, be sure to configure

 

the woofers so that they each

 

receive the same amount of

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

Impedance = w1 + w2 + w3 ...

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

Figure 1. Connecting two woofers in series to the amplifier (8 ohms)

 

 

Red

Black

 

 

Red

 

Black

Positive

Negative

Positive

Negative

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

To Amp

To Amp

Positive

Negative

When designing a subwoofer system,

power from the amplifier. Never

Impedance =

1

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 system performance.

connect two identical woofers in

series and then connect that pair

to another woofer in parallel. If

your system will include an odd

number of woofers, be sure to

connect all the woofers in either

series or parallel according to

the rules that follow, in order to

maximize the power available

from your amplifier:

w11 + w12 + w13 ...

where w is the nominal impedance of the woofer.

The diagrams at right show series and parallel speaker connections.

Figure 2. Connecting two woofers in parallel to the amplifier (2 ohms)

Red Black

Positive Negative

Red Black

Positive Negative

To Amp

To Amp

Positive

Negative

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Contents GT5-12 Choosing AN Enclosure GT5-12 subwoofer has a single Connecting Your Subwoofer to Your AmplifierGT5-12 Specifications