Connecting Your Subwoofer to Your Amplifier J BL GTO Series

JBL GTO Series subwoofers are available in two different configurations: as a single 2-ohm voice coil or as dual 2-ohm voice coils. Depending on the amplifiers you are using, you may use either single-voice coil or dual-voice coil subwoofers in singles or multiples to maximize the power available from your amplifiers. To achieve the maximum amplifier output possible, you should design a speaker system that provides the lowest impedance that

your amplifier is rated to drive safely. When designing a subwoofer system, consider the following rules:

1.Don’t mix different subwoofer or enclosure types in the same system (use all single-coil woofers or all dual-coil woofers).

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. The amplifier- damping factor (the amplifier’s ability to control the motion of the woofer) is expressed as a ratio of terminal impedance (the sum of speaker impedance, wire resistance and the D.C. resistance of any crossover coil connected to the woofer) to amplifier-output impedance. Therefore, connecting separate woofers in series reduces the damping factor of the amplifier to a value less than 1. This will result in poor transient response.

3.You must use both coils of a dual-voice coil woofer connected either in series or in parallel.

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.

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:

1

Impedance = 1 + 1 + 1 . . .

w1 w2 w3

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.

Figure 1. Parallel connection

RED

BLACK

STRIPE

STRIPE

POS ( + )

NEG ( – )

POS ( + )

 

 

NEG ( – )

Figure 2. Series connection

RED BLACK

STRIPE STRIPE

POS ( + ) NEG ( – )

POS ( + )

NEG ( – )

 

03

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JBL GTO10200, GTO12200 owner manual Connecting Your Subwoofer to Your Amplifier J BL GTO Series, Parallel connection
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GTO1020, GTO12200, GTO10200, GTO1220 specifications

The JBL GTO series of car speakers, including the GTO10200, GTO12200, GTO1220, and GTO1020, are designed to deliver exceptional sound quality and performance. These models leverage advanced technologies and premium materials to provide a superior audio experience for music lovers on the road.

Starting with the GTO10200, this 10-inch subwoofer features a lightweight, injection-molded polypropylene cone that enhances durability while providing powerful bass. Its patented UniPivot technology allows the speaker to be oriented for optimal sound projection, making it perfect for any vehicle configuration. The GTO10200 is equipped with a robust rubber surround, ensuring long-lasting performance and reduced distortion at higher volumes.

Next in line is the GTO12200, another impressive 12-inch subwoofer that pushes the boundaries of deep bass reproduction. One of its standout features is the low impedance design, allowing for more efficient power handling and greater output levels. Similar to the GTO10200, it incorporates a sturdy build and an advanced voice coil cooling system to manage heat during prolonged use. This model is ideal for those seeking to deepen their bass experience without sacrificing clarity or detail.

The GTO1220 is a 12-inch dual voice coil subwoofer designed for easy integration into various audio systems. This speaker stands out for its versatility, accommodating different setups, whether for a sealed or ported enclosure. Its high power handling capacity ensures that it can deliver rousing bass while maintaining a clean sound profile. The durable construction and well-engineered design make it a reliable choice for audiophiles looking for performance at an affordable price.

Lastly, the GTO1020 is a compact 10-inch subwoofer that caters to customers with limited space but still demands quality audio. With a balanced sound profile, this model can fill a car interior with rich and impactful bass without overpowering other frequencies. The GTO1020 utilizes JBL's innovative technology to ensure consistency and longevity, making it a great option for both beginners and seasoned users alike.

In summary, the JBL GTO series encompasses various models suitable for different preferences and needs. Whether you prioritize robust sound, deep bass, or compact size, the GTO10200, GTO12200, GTO1220, and GTO1020 provide a broad range of options with standout features and technologies that will elevate your in-car audio experience.
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