JBL CBT70JE-1 Specifications

CBT 70JE-1

Purpose-Designed Extension
for CBT 70J-1 Line Array
Column Speaker

Key Features:

CBT 70JE-1:

Components: Four 125 mm (5 in) high-power LF
drivers

500 Watt power handling
Built-in purpose-designed crossover network, for

combining with CBT 70J-1
Coupler plate included

CBT 70J-1 + 70JE-1 ARRAY SYSTEM:

Extended pattern control (to 400 Hz for ± 20°
control, to 200 Hz for substantial off-axis
cancellation)

Extended bass response to 45 Hz.
Components: Sixteen 25 mm (1 in) soft dome

tweeters and eight 125 mm (5 in) high-power
LF drivers.

Patent-pending Constant Beamwidth
Technology™ provides constant directivity up
to the highest frequencies and reduces
out-of-coverage lobing.

Vertical pattern coverage switchable between
45° for medium-throw coverage and 25° for
long-throw applications.

Switchable voicing provides flat response in
music mode or mid-range presence peak in
speech mode.

Coupler plate and wall swivel (pan)/tilt
bracket included (rear insert-point pattern
fits standard third-party brackets)

Overview:

CBT 70JE-1

The CBT 70JE-1 cabinet contains four low
frequency drivers and a crossover network
purposely designed for use in the CBT 70J-1 +
70JE-1 System, in a tough fiberglass-reinforced
ABS enclosure. The 500W power handling and
high sensitivity delivers powerful low
frequency output.

The drivers have lightweight dual magnet
neodymium motors with 38 mm (1.5 in) diameter
voice coils. The dual-magnet system provides
maximum flux in a compact package. The magnet
structure is magnetically shielded and the pole
tips are magnetically saturated for lower flux
modulation and minimum distortion. The 16 mm
(0.63 in) long coils provides high linear drive and
high power handling in a compact driver. The
drivers feature damped blended surrounds and
coated sealed paper cones found in high
performance large format drivers. Drivers feature
coated diaphragm materials to provide moisture,
UV and salt resistance for outdoor capability.
The thick, heavy-duty aluminum grille stands up
to portable/event applications while allowing for
rust-free installation outdoors.

CBT 70J-1 + 70JE-1 ARRAY SYSTEM

When connected to a CBT 70J-1 line array
column speaker, the CBT 70JE-1 Extension
provides extended bass response, extended
pattern control, and increased sound output
levels. The combined array system provides
Constant Beamwidth Technology™, which
represents a breakthrough in pattern control
consistency, utilizing complex analog beam­forming and amplitude tapering to accomplish

CBT 70JE-1

Shown with

included grille

superior, consistent vertical coverage without the narrow vertical beaming and out-of-coverage lobing
that are typical of passive column speakers.

The CBT 70JE-1 attaches to the top of the CBT 70J-1, utilizing the included coupler plate, resulting
in a very well controlled progressive line array with asymmetrical vertical coverage. This coverage
produces a higher concentration of sound with a tighter pattern projecting to the far areas of the
listening space, and a lower concentration with a broader vertical pattern projecting toward the near
area of the space. This results in more even front-to-back SPL levels than would be the case from a
traditional speaker or column that projects symmetrically.

The CBT 70J-1 + 70JE-1 System provides a wide 45 Hz – 20 kHz bandwidth, and the slim footprint
fits well into virtually any architectural décor. The 140 cm (55.2 in) tall line array height provides
consistent pattern control throughout the intelligibility band, making the System work well in
difficult acoustic environments.

Grille

removed

CBT 70J-1 + 70JE-1 Array System

Shown with

included grille

Grille

removed

Applications

The superior sound quality, excellent pattern control, asymmetrical vertical coverage and compact
design makes the CBT 70J-1 + 70JE-1 System ideal for applications such as performance spaces,
lecture halls, classrooms, A/V, transit centers, school stadiums, multipurpose spaces, racetracks, theme
parks, and fill applications, among many others.

Adjustable Coverage to Fit the Application

The innovative coverage adjustability of the CBT 70J-1 + 70JE-1 System allows switching between
broad and narrow vertical coverage settings to allow matching the coverage and throw requirements
of the application. Coverage can be easily switched in-venue with the speaker already installed. This
innovation allows a single loudspeaker system to excel in a wide range of project types.

User Variable Voicing

The voicing of the CBT 70J-1 + 70JE-1 System can be set to match the application through a
Music/Speech switch. The Music setting provides flat frequency response, while the Speech setting
produces a mid-range presence boost to provide clear, intelligible speech, along with increased
midrange sensitivity for higher midrange maximum output capability.

SonicGuard

Dynamic SonicGuard protection of the CBT 70J-1 + 70JE-1 System (built into the CBT 70J-1)
protects the high frequency section, minimizing distortion at high drive levels by limiting driver
excursion dynamically. This maximizes music clarity and speech intelligibility at high drive levels
while protecting the drivers from damage due to occasional overpowering.

™

Bracketry

A thick coupler plate for connecting the CBT 70J-1 + 70JE-1 end-to-end is included with the 70JE-1.
The CBT 70J-1 + 70JE-1 System can utilize the swivel (pan) / tilt wall bracket that is included with the
70J-1, or can utilize industry-standard mounting points on the coupler plate (OmniMount™ 60.0 and

120.0 patterns) for attaching to a wall. Alternatively, the M6 inserts on the back panel can be utilized
to suspend the speaker using forged shoulder steel eyebolts or swivel mounting rings, providing
installation versatility.

The CBT 70J-1 + 70JE-1 System can be installed either indoors or outdoors. The drivers are
weather-treated, the fiberglass reinforced ABS cabinet is excellent for outdoor applications, external
screws are stainless steel, and the painted aluminum grille resists rusting. Available in black or white
(-WH)

CBT 70JE-1 Purpose-Designed Extension for CBT 70J-1 Line Array Column Speaker

Specifications:

CBT 70JE-1 EXTENSION LOUDSPEAKER

Components: Four (4) 130 mm (5 in) LF drivers

Frequency Range (-10 dB)1: 45 Hz – 700 Hz

Sensitivity (2.83V @ 1m): 90 dB full space, 96 dB half-space (65 Hz - 300 Hz)

Nominal Impedance: 8 ohms

Power Capacity2: 500 W (2000 W peak), 2 hrs

350 W (1400 W peak), 100 hrs

Max SPL3: 117 dB

Net Weight: 8.2 kg (18 lb)

CBT 70J-1 + 70JE-1 SYSTEM (connected end-to-end, driven in parallel)

Components: Eight (8) 130 mm (5 in) LF drivers

Frequency Range (-10 db)1: 45 Hz – 20 kHz

Coverage: Vertical (selectable via switch)

Sensitivity (@1m)

Nominal Impedance: 4 ohms

Power Capacity

Max SPL

Transducers:

Low Frequency Drivers: 8 pcs, 130 mm (5 in) drivers, dual magnet neodymium, 38 mm (1.5 in) voice coil, damped blended textile surround, coated

High Frequency Drivers: 16 pcs, 25 mm (1 in) drivers, dual magnet neodymium, encased magnet and coated diaphragm for moisture, UV and salt

Enclosure:

Enclosure: Fiberglass-reinforced ABS cabinet, painted aluminum grille.

Outdoor Capability: IP-54 rated, per IEC 529, UV, moisture and salt-spray resistant.

Insert Points: 20 insert points total, 8 utilized for coupler plate, M6 (16 mm deep) on back panel

Mounting: Coupler plate joins the CBT70J-1 and 70JE-1 end-to-end. Threaded points on coupler plate accepts OmniMount™ 60.0 Series and

Dimensions (H x W x D): 1388 x 170 x 237 mm (54.8 x 6.7 x 9.3 in)

Net Weight: 20.4 kg (45 lb)

Included Accessories: Coupler plate (included with 70JE-1)

Optional Accessories: MTC-PC2 terminal panel cover

1

Full space

2

IEC standard, full bandwidth pink noise with 6 dB crest factor.

3

Calculated based on power rating and measured sensitivity, exclusive of power compression.

JBL continually engages in research related to product improvement. Some materials, production methods and design refinements are introduced into existing products without notice as a routine expression of
that philosophy. For this reason, any current JBL product may differ in some respect from its published description, but will always equal or exceed the original design specifications unless otherwise stated.

Sixteen (16) 25 mm (1 in) HF drivers

Narrow Mode: 25° (2 kHz – 16 kHz) (±10°)
Broad Mode: 45° (350 Hz – 16 kHz) (±10°)

Horizontal 150° (500 Hz – 18 kHz, ±20°)

1

: Narrow: (speech mode) 98 dB @ 2.83V, 95 dB @ 2.0V (150 Hz – 8 kHz)

(music mode) 94 dB @ 2.83V, 91 dB @ 2.0V (80 Hz – 18 kHz)

Broad: (speech mode) 97 dB @ 2.83V, 94 dB @ 2.0V (100 – 8 kHz)

(music mode) 93 dB @ 2.83V, 90 dB @ 2.0V (70 Hz – 18 kHz)

2

: 1000 W (4000 W peak), 2 hrs

700 W (2800 W peak), 100 hrs

3

: Narrow: (speech mode) 125 dB cont ave (131 peak)

(music mode) 121 dB cont ave (127 peak)

Broad: (speech mode) 124 dB cont ave (130 peak)

(music mode) 120 dB cont ave (126 peak)

diaphragm for moisture, UV and salt resistance, shielded.

resistance, shielded.

Colors: Black or white (-WH)

120.0 Series compatible wall-mount brackets, as well as points for the swivel (pan)/tilt wall bracket that is included with CBT 70J-1.
Twelve (12) additional M6 mounting points accept forged shoulder steel eyebolts or swivel clips for suspension.

Swivel (pan) / tilt wall bracket (included with 70J-1)

MTC-CBT-SMB1 Stand-Mount Bracket for use with 35 mm heavy duty speaker stand
(must be heavy-duty stand for stability with this array)
MTC-CBT-FM2 flush-mount low-profile wall-mount bracket

CBT70JE-1

Frequency Response (full-space, 4π) and Impedance

100 40

90

80

SPL (dB)

70

60

20 100 1000 10000 20000

Frequency (Hz)

30

20

Ohms

10

0