CONNECTING YOUR SUBWOOFER TO YOUR AMPLIFIER

JBL Grand Touring Series subwoofers are available in two different configurations: as dual

4-ohm voice coils or as dual 2-ohm voice coils. Depending on the amplifiers you are using, you may use GTO subwoofers in singles or multiples to maximize the power available from your amplifiers. To

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

achieve the maximum amplifier

Impedance =

1

NOTE: The GTO1004D, GTO1204D

output possible, you should design a 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 from 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.

NOTE: There are two jumpers supplied with the woofers to make connections easier.

and GTO1504D come with both jumpers installed for a parallel configuration.

Figure 2. Series connection

NOTE: The GTO1002D, GTO1202D and GTO1502D come with one jumper installed for a series configuration.

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JBL GTO1204D, GTO1004D, GTO1002D, GTO804 Connecting Your Subwoofer to Your Amplifier, Either in series or in parallel

GTO1504D, GTO1004D, GTO1502D, GTO1002D, GTO1204D specifications

JBL has long been a leader in the car audio industry, and their GTO series is a testament to their commitment to superior sound quality and innovative technologies. The GTO804, GTO1204D, GTO1202D, GTO1002D, and GTO1502D are prime examples of this dedication, each model designed to cater to specific listening preferences and installation needs.

The JBL GTO804 is an 8-inch subwoofer that packs a punch in a compact size. With a peak power handling of 800 watts and a RMS rating of 200 watts, it delivers deep and powerful bass with minimal distortion. Its patented Plus One cone technology allows for a larger cone surface area, which improves the bass output while maintaining sound clarity. The GTO804 is especially suited for smaller vehicles or as part of a more extensive sound system where space is a concern.

Moving up in size, the GTO1204D is a 12-inch subwoofer that takes performance to the next level. It features a dual 4-ohm voice coil design, allowing for versatile wiring options to match the amplification requirements. With a peak power handling of 1200 watts and an RMS rating of 300 watts, this subwoofer loves to hit hard, producing rich lows that can satisfy any bass enthusiast. Its durable rubber surround and polypropylene cone contribute to longevity and performance consistency.

The GTO1202D is another excellent 12-inch option, known for its high sensitivity and robust build. This model shares many characteristics with the GTO1204D but has a lower RMS power handling at 250 watts and is designed for those who desire powerful bass without overcomplication. Its performance is backed by a unique vented pole piece that helps maintain voice coil temperature, ensuring flexibility in after-hours sessions.

For those looking for a smaller dual-subwoofer setup, the GTO1002D, a 10-inch option, offers an impressive balance of size and power. The dual 2-ohm voice coils allow for both series and parallel connections, making it versatile for various amplifier configurations. With a peak power of 1000 watts, it serves up solid performance while fitting comfortably into more compact enclosures.

Finally, the GTO1502D stands as the powerhouse of the GTO series. With a 15-inch design, this subwoofer delivers explosive bass and showcases enhanced power handling with a peak of 1500 watts and an RMS rating of 400 watts. It's constructed with durable materials that ensure longevity and comes equipped with features like a unique rubber surround for greater excursion and support during high-output scenarios.

Each model in the JBL GTO series is engineered with the latest sound technologies, making them not only powerful but also reliable in different vehicle acoustics. With their advanced design and engineering, these subwoofers are a fantastic addition for any car audio aficionado looking to elevate their listening experience.