JBL 312CS, 328CT, 322CT, 321CT, 300 Series manual Figure B Parallel System Hookup Diagram

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WIRING INSTRUCTIONS

Figure B:

Parallel System

Hookup Diagram

1

2

3

4

+ -

Speaker 1

Power Amp

1

2

3

4

Speaker 2

+

-

1

2

3

4

Speaker 3

2.) Using Loop-Through Terminals (Pins 2 & 3) -- By connecting the wire pair of the subsequent speaker to pins 2 & 3, then all subsequent speakers will be disconnected when this speaker’s connector is disconnected during troubleshooting . This can be useful as a way to isolate problems to a section of the distributed line while leaving the wires attached to the connector.

Figure C:

Using Loop-

Through Terminals

+

-

From Amplifier or Previous Speaker

Figure D:

Loop-Through System

Hookup Diagram

1

+

IN

 

 

 

 

 

 

3

4

2

+

-

-

Loop Loop IN Thru Thru

-

+

To Subsequent

Speakers

+ -

Power Amp

1

2

3

4

Speaker 1

1

2

3

4

Speaker 2

+

-

1

2

3

4

Speaker 3

6 JBL Professional Control 300 Series

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Contents User’s Guide Table of Contents Product Description Product Feature Identification Control 322CT ShownWiring Instructions Hookup Schemes for Subsequent SpeakersFigure B Parallel System Hookup Diagram Control 328C/CT System Assembly Assembling the Control 328C/CT into the Back CanControl 321C/CT, 322C/CT & 312CS System Assembly Using JBL Professional’s MTC-300BB12 Using a different brand compatible back boxBack Box ACCESSORIES, Maintenance & Contacting JBL Optional AccessoriesSpecifications ListedNorthridge, CA 91329 USA

312CS, 300 Series, 328C, 322CT, 328CT specifications

JBL, a well-renowned name in the audio industry, has long been associated with innovation and superior sound quality. Among its impressive lineup, the JBL 321C, 321CT, 322C, 328CT, and 322CT stand out for their remarkable features, cutting-edge technologies, and versatile characteristics, ensuring an exceptional listening experience.

The JBL 321C is designed with a sleek, modern aesthetic, making it a stylish addition to any setting. This compact speaker delivers clear and balanced sound, thanks to its advanced driver technology and well-engineered acoustics. The inclusion of a high-frequency driver enhances the overall soundstage, providing crisp highs and detailed mid-range frequencies. This model is perfect for smaller spaces, ensuring that users still experience robust audio performance without overwhelming their environment.

Moving to the JBL 321CT, this variant introduces the convenience of a built-in transformer, making it suitable for commercial installations where efficient power usage is key. Like its counterpart, it boasts exceptional audio fidelity, ensuring that it can easily adapt to various applications, such as retail spaces or hospitality environments. Its reliability and sound quality make it a smart choice for professionals seeking a robust audio solution.

The JBL 322C and 322CT models further enhance this series by incorporating dual-speaker configurations. This design philosophy increases sound dispersion and volume output. With the 322C, users can expect a rich audio experience that fills larger rooms, making it ideal for home theaters and other entertainment spaces. Meanwhile, the 322CT expands functionality with its transformer setup, making it a prime choice for commercial use while delivering excellent sound quality.

Lastly, the JBL 328CT stands as a flagship option in the series. This model combines advanced technologies, such as a powerful woofer and an optimized high-frequency driver, to produce an impressive sound profile. It features an enhanced bass response, making it perfect for music enthusiasts who crave depth in their audio experience. The 328CT is designed for both home and professional environments, offering flexibility without compromising sound fidelity.

All these models emphasize JBL’s commitment to high-quality sound, reliability, and aesthetics. Their ability to deliver clarity across diverse music genres, combined with their versatility for both residential and commercial use, make the 321C, 321CT, 322C, 328CT, and 322CT exceptional choices for anyone looking to enhance their audio experience. Whether in a cozy living room or a bustling public venue, these speakers promise to deliver unparalleled sound quality that embodies the true essence of JBL's audio legacy.