Check the listing for details. JBL CBT70JE-1-JBL Column Array Extension Speaker - Black. Color: Black, Condition: New. Listed at 608.99 USD. The JBL CBT 70JE-1 extends your CBT 70J-1 line array column speaker with four 5" woofers, yielding chest-thumping low-end down to 45Hz. These high-power low-frequency drivers feature dual-magnet neodymium motors with 1.5" diameter voice coils that provide top-shelf sound reproduction with minimum distortion. This extension cabinet includes a built-in crossover that's purpose-built for a CBT 70J-1 + 70JE-1 system, ensuring an optimal balance of frequencies. The CBT 70JE-1 is housed in a durable fiberglass-reinforced ABS enclosure with a heavy-duty aluminum grill. CBT 70J-1 + 70JE-1 combined array system When you add a CBT 70JE-1 to your CBT 70J-1, the result is a powerful line array with extended bass response, greater pattern control, and incredible output. The combined system employs JBL's Constant Beamwidth Technology to produce incredibly balanced projection across a large area. The far areas will benefit from a higher concentration of sound with a tighter pattern. The closer areas will experience a lower concentration with a broader vertical pattern. In short, a CBT 70J-1 + 70JE-1 system ensures that your entire audience experiences excellent sound. We've found the CBT 70JE-1 easy to install — you simply attach it to the top of your CBT 70J-1 using the included coupler plate. JBL CBT 70JE-1-WH Features: Extends your CBT 70J-1 line array column speaker (sold separately) with four 5" low-frequency drivers Yields chest-thumping low-end down to 45Hz Dual-magnet neodymium motors with 1.5" diameter voice coils provide top-shelf sound reproduction with minimum distortion 0.63" long coils provides high linear drive and high power handling in a compact driver Drivers feature the same damped blended surrounds and coated sealed paper cones found in high-performance large-format drivers Built-in crossover that's purpose-built for a CBT 70J-1 + 70JE-1 system Drivers boast coated diaphragm materials to provide moisture, UV, and salt resistance Durable fiberglass-reinforced ABS enclosure with a heavy-duty aluminum grill Coupler plate is included