Choosing an Enclosure J BL Power Series

Choosing an Enclosure J BL Power Series

Thank you for purchasing a new JBL Power Series subwoofer. Subwoofer installation requires woodworking skills and some experience disassembling and reassembling automotive interiors. If you lack the tools or necessary skills, have your subwoofer installed by an authorized JBL dealer.

Warning: Playing loud music in an automobile can permanently damage your hearing as well as hinder your ability to hear trafﬁc. We recommend listening at low levels while driving. JBL accepts no liability for hearing loss, bodily injury or property damage resulting from use or misuse of this product.

Power Series subwoofers are optimized to perform best in small, sealed, vented and prefabricated bandpass enclosures. While inﬁnite-bafﬂe mounting of Power Series subs is possible, power handling will be greatly compromised because there’s no enclosed volume of air to prevent the speaker’s cone from moving past its limit. For this reason, we do not recommend inﬁnite-bafﬂe mounting for Power Series subwoofers.

You should choose the enclosure you will use based on the type of music you listen to, how much ampliﬁer power you will use for the subwoofer and how much space inside the vehicle you can devote to a subwoofer enclosure.

Because a sealed enclosure provides the most control over the woofer’s movement, a woofer mounted in a sealed enclosure will handle more power than a woofer mounted in another enclosure type. Sealed enclosures provide more accurate sonic reproduction than other enclosure types, so they are well suited to all types of music.

Sealed-enclosure construction is straightforward and there are many prefabricated sealed enclosures available. An optimum sealed enclosure is always smaller than other types of enclosures optimized for a particular speaker, so they require the smallest amount of space inside the vehicle.

Vented enclosures provide better efﬁciency in the 40Hz – 50Hz range but this efﬁciency comes at the expense of sound in the lowest octave (below 40Hz) and at the expense of some control and power handling. If you are using a small ampliﬁer, a vented box will provide more bass output from less power. Vented enclosures are also well suited to a variety of music types. Because vented enclosures require the volume of the enclosure and the size of the port to have a speciﬁc relationship with the characteristics of the woofer, the enclosure must be built exactly to the speciﬁcations provided. While there are some prefabricated vented boxes available, matching a prefabricated box to a particular woofer is difﬁcult. If you wish to use a vented enclosure, we strongly

recommend having your authorized JBL dealer build it or verify that your design is correct if you wish to build it yourself. An optimum vented enclosure is always larger than the optimum sealed box for the same woofer and will require more space inside the vehicle.

Bandpass enclosures often provide the most output available from any ampliﬁer and subwoofer combination at the expense of sonic accuracy. If sheer SPL (sound-pressure level) is what you desire most, choose a bandpass enclosure. Bandpass-enclosure design is very tricky and the aid of a computer and enclosure design-software is necessary. If you are an experienced installer or have some woodworking experience, you may wish to build the enclosure described in the enclosure design sheet included with this woofer. Fortunately, there are many prefabricated bandpass boxes available and they are all optimized to extract the most output possible from any woofer. Bandpass enclosures can be quite large and may require a lot of space inside your vehicle.

P1220II, P1020DII, P1020II, P1220DII specifications

JBL is a name synonymous with high-quality audio equipment, and their line of professional loudspeakers, including the JBL P1020II, P1220DII, P1020DII, and P1220II, showcases the brand’s commitment to delivering exceptional sound performance. These speakers are designed for both live and installed sound applications, making them versatile solutions for various environments.

The JBL P1020II is a 10-inch 2-way speaker that delivers a maximum output of 300 watts. Its compact design makes it ideal for smaller venues or as part of a larger sound system. The speaker features a high-frequency compression driver that provides clear and detailed sound reproduction, especially in mid and high-frequency ranges. The horn-loaded design allows for a wider dispersion of sound, ensuring that audio reaches every corner of the room.

In contrast, the P1220DII is a 12-inch 2-way speaker, also capable of delivering up to 300 watts. This model excels in bass response, making it an excellent choice for genres that require more low-end presence. Similar to the P1020II, it incorporates a high-frequency compression driver and horn-loaded technology, ensuring clarity and a broad sound coverage.

The P1020DII represents a step up in the range, providing not just enhanced power handling but also improved sound fidelity through JBL’s advanced engineering. It is designed with a dual 10-inch configuration, allowing for greater volume levels without distortion, making it suitable for larger venues or outdoor events.

The P1220II utilizes a 12-inch woofer with a new design that enhances durability and performance. This speaker includes advanced materials in its construction, contributing to a lightweight yet sturdy build, which is crucial for both transportation and setup in live sound applications.

All four models feature JBL’s proprietary Differential Drive technology, which offers low distortion and high efficiency. They are constructed with rugged enclosures that withstand the rigors of sound reinforcement in various settings, from concert halls to festivals. The easy-to-mount design facilitates quick installation and teardown, which are essential for touring professionals.

In summary, the JBL P1020II, P1220DII, P1020DII, and P1220II are engineered for optimal sound performance, combining advanced technologies and durable construction. They provide exceptional audio fidelity across their frequency ranges, catering to the needs of both sound professionals and enthusiasts who demand high-quality sound in any situation.