Power-Handling

Limitations

The power-handling capability of any woofer is related to both its ability to dissipate heat and the maximum excursion limits of its cone. Once the speaker’s voice coil moves outside the magnetic gap, power can no longer be con- verted into motion, and all the amplifier’s power is converted into heat in the voice coil. This voice-coil heating is the largest detriment to speaker longevity, so overexcursion (driving the speaker past Xmax) should be avoided. Since speaker-cone excursion is different for each type of enclosure, power handling is different for each enclosure.

•Voice-coil overheating and burn- ing due to over-excursion is often caused by overdriving an ampli- fier into “clipping.” A severely clipped signal, or squarewave, contains nearly twice the power of a clean sine wave at the same level. Bass that sounds broken up and distorted at higher volumes usually indicates that the ampli- fier is being asked to deliver power beyond its ability.

•Infinite baffle or “free air” mounting applications allow for greater cone excursion than sub- woofers mounted in an enclosure. In order to compensate, recognize that the power-rating value of the

subwoofer will likely be half its rated power in this application.

•Study the excursion curves on the enclosed GT Series data sheet and note the differences for different enclosure applica- tions. The type and size of box used will produce different excur- sion demands on the enclosed subwoofer and, consequently, different levels of power han- dling. As long as recommended parameters are used, the sub- woofer will perform properly in its enclosed environment.

However, any design deviation may result in less than optimum performance, and may also subject the subwoofer to over- excursion that can eventually damage the speaker. For additional help with this issue, please contact your authorized JBL dealer.

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JBL GT1200d, GT800d, GT1000d, GT1500d owner manual Power-Handling Limitations
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GT1000d, GT800d, GT800, GT1200, GT1200d specifications

JBL is a renowned name in the audio industry, well known for its high-quality speakers and subwoofers. Among their impressive lineup, the JBL GT series, including the GT1000, GT1500D, GT1200D, GT1200, and GT800, stands out for their powerful performance and innovative features catering to car audio enthusiasts.

The JBL GT1000 is designed to provide robust bass response and clarity. It employs a polypropylene cone that ensures durability while delivering crisp sound quality. With its high power handling, the GT1000 can produce deep bass without distortion, making it a popular choice among car audio lovers. Its compact design allows for flexible installation options in various vehicle types.

Moving on to the JBL GT1500D, this model stands out with its dual voice coil design, which enhances its versatility in wiring configurations. Capable of generating a significant amount of power, the GT1500D employs advanced technology to ensure efficient energy conversion, resulting in powerful, clear bass that can elevate any car audio experience. The incorporation of a built-in low-pass filter allows users to customize their sound profile easily.

The JBL GT1200D is another powerful option in this series, featuring a lightweight yet sturdy construction that aids in its performance. This model is engineered with a vented pole piece to enhance airflow and reduce overheating during prolonged use, ensuring longevity and reliability. The GT1200D's optimized frequency response allows for truly immersive sound quality.

Next in the lineup is the JBL GT1200, which is tailored for users seeking good bass without sacrificing space in their vehicle. It combines a sleek design with an efficient motor structure, delivering impressive low-frequency response while maintaining clarity in the higher frequencies. This makes it ideal for a balanced sound output, whether it be pop, rock, or hip-hop.

Lastly, the JBL GT800 is an entry-level subwoofer that provides exceptional value for those looking to upgrade their car audio system without breaking the bank. Despite its smaller size, the GT800 still packs a punch, delivering solid bass response. Its robust build quality ensures it can withstand the rigors of vehicle use while still performing at a high level.

Overall, the JBL GT series offers a variety of options, delivering powerful sound performance suited for any listener's needs, thanks to their innovative technology and high-quality materials used in construction. Whether seeking deep bass or balanced sound, these models are designed to enhance any car audio experience.
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