JBL Cbt 70JE-1 Extension For Cbt 70J-1 Column Spk, Blk
Description
JBL CBT 70JE-1 Extension for CBT 70J-1 Column Speaker, Black
The CBT 70JE-1 is a dedicated extension module that stacks onto the CBT 70J-1 column speaker to expand coverage area and add low-end punch to your rig. Built for live sound operators and installers who need to scale a system without losing tight pattern control, this extension pairs with the base unit to create a vertically extended array with deeper bass reach and controlled directivity across the venue.
Sound & Coverage
This extension delivers extended bass response down to 45 Hz and maintains precise pattern control to 400 Hz for ±20° control, with substantial off-axis cancellation extending to 200 Hz. The switchable vertical coverage modes—Narrow Mode 25° (±10°) or Broad Mode 45° (±10°)—combined with 150° horizontal coverage (±20°), let you dial in coverage to fit the room without wasting energy or creating hot spots.
Build & Rigging
The extension weighs 45 lbs and features a reinforced grille design built to handle the road and repeated venue setups. Twelve M6 mounting points accept forged shoulder steel eyebolts or swivel clips, making it simple to stack securely with the primary speaker unit for vertically mounted configurations that stay put during load-in and performance.
Key Features
- Four 25 mm (1 in) soft dome tweeters
- Eight 125 mm (5 in) high-power LF drivers
- Dual magnet neodymium motors with 38 mm (1.5 in) diameter voice coils
- 500W power handling
- Frequency range (-10 dB): 45 Hz – 20 kHz
- Extended bass response to 45 Hz
- Pattern control to 400 Hz for ±20° control
- Vertical coverage switchable: Narrow 25° (±10°) or Broad 45° (±10°)
- Horizontal coverage 150° (±20°)
- Twelve M6 mounting points for eyebolts or swivel clips
- Weight: 45 lbs
- Stronger reinforced grille design
The CBT 70JE-1 extension transforms the base CBT 70J-1 into a larger, more capable array ideal for theaters, houses of worship, conference centers, and other live and installed venues that demand precise directional control with extended low-end capability.
More Information
| Condition | New |
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At a Glance
The JBL CBT 70JE-1 is a professional extension module that stacks with the CBT 70J-1 column speaker to expand vertical coverage and deepen bass response down to 45 Hz while maintaining tight pattern control. Built for venues, theaters, and houses of worship that need flexible directional coverage—switchable between narrow (25°) and broad (45°) modes—with road-ready construction and secure suspension rigging. Choose this extension to scale a proven column system without replacing infrastructure, gaining the acoustic reach and controlled off-axis rejection that complex rooms demand.
Who This Is For
Great for
- ✓ Live Performance
- ✓ Theater/Venue Sound
- ✓ Houses of Worship
- ✓ Conference/Install Audio
Not the best pick for
- – Home Recording
- – Practice
Skill level: Professional
Frequently Asked Questions
What does the CBT 70JE-1 extension do, and do I need the base CBT 70J-1 speaker to use it?
The CBT 70JE-1 is a dedicated extension module that stacks vertically with the CBT 70J-1 base unit to increase overall output, extend bass response to 45 Hz, and enlarge the speaker array's coverage pattern. It cannot function as a standalone speaker; it requires the CBT 70J-1 to operate.
What vertical and horizontal coverage patterns does this extension offer?
The CBT 70JE-1 provides switchable vertical coverage in Narrow Mode (25° ±10°) or Broad Mode (45° ±10°), with a fixed horizontal coverage of 150° (±20°). This flexibility allows you to tailor the pattern to your venue's dimensions and audience placement.
How much does the extension weigh, and how is it mounted?
The CBT 70JE-1 weighs 45 lbs and features twelve M6 mounting points that accept forged shoulder steel eyebolts or swivel clips for secure vertical stacking and suspension rigging. This design enables safe installation in theaters, houses of worship, and other professional venues.
What frequencies and drivers does this extension contain?
The extension houses four 25 mm soft-dome tweeters and eight 125 mm high-power low-frequency drivers with dual-magnet neodymium motors, delivering 500W power handling and a frequency range of 45 Hz to 20 kHz (-10 dB). It maintains precise pattern control down to 400 Hz with substantial off-axis cancellation.
Is this extension suitable for small rooms or home studios?
No; the CBT 70JE-1 is designed exclusively for professional live-sound installations, theaters, houses of worship, and conference venues. It is not intended for home recording or practice applications.