Transcript
CBT 70J-1
Constant Beamwidth Technology™ Two-Way Line Array Column with Asymmetrical Vertical Coverage
Key Features:
Asymmetrical vertical coverage sends more sound toward far area of room to make front-toback sound levels more consistent. Components: Sixteen 25 mm (1 in) soft dome tweeters and four 125 mm (5 in) high-power LF drivers, arranged coaxially. Patent-pending Constant Beamwidth Technology™ provides constant directivity up to the highest frequencies and reduces out-ofcoverage 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. Dynamic SonicGuard™ overload protection of HF devices Swivel (pan) / tilt wall bracket included.
Overview:
The CBT 70J-1, with Constant Beamwidth Technology™, represents a breakthrough in pattern control consistency, utilizing complex analog delay beam-forming and amplitude tapering to accomplish superior, consistent vertical coverage without the narrow vertical beaming and out-of-coverage lobing that are typical of straight form-factor column speakers. The CBT 70J-1 combines Constant Beamwidth Technology with a physical J-shaped curving, resulting in a very well controlled progressive line array with asymmetrical vertical coverage. The asymmetrical coverage produces a higher concentration of sound with a tighter pattern from the upper half of the array and a lower concentration of sound with a broader vertical pattern from the lower half of the array. This sends more sound toward the far area of the room than to the near area of the room, resulting in more even front-to-back SPL levels than would be the case from a traditional speaker or column that projects symmetrically in the vertical plane. The two-way coaxial design provides a wide 60 Hz – 20 kHz bandwidth. The low-diffraction baffle eliminates frequency response irregularities that could otherwise occur due to baffle discontinuities. The thick, heavy-duty aluminum grille stands up to portable/event applications while allowing for rust-free installation outdoors. The slim, compact design fits well into virtually any architectural decor. The 70 cm (27.6 in) tall line array height provides consistent pattern control throughout the intelligibility band, making the CBT 70J-1 work well in difficult acoustic environments.
Applications The combination of superior sound quality, excellent pattern control, asymmetrical vertical coverage and compact design makes CBT 70J-1 extremely versatile. It is ideal for applications such as performance auditoriums, lecture halls, classrooms, A/V, transit centers, school stadiums,
Shown with included grille.
Grille removed.
multipurpose spaces, racetracks, theme parks, and fill applications, among many others.
Adjustable Coverage to Fit the Application The innovative coverage adjustability 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 model to excel in an extremely wide variety of project types.
User Variable Voicing The voicing 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 even at the longest throw distances, along with increased midrange sensitivity for higher midrange maximum output capability.
Drivers The low frequency drivers are 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 coil provides high linear drive and high power handling in a compact driver. The LF drivers feature damped blended textile surrounds and coated sealed paper cones found in high performance large format drivers. The high frequency driver features a dual magnet neodymium structure for maximum sensitivity. The tweeter is encased for weather resistance. The drivers are magnetically shielded to allow close placement CRT monitors. Both drivers feature coated diaphragm materials to provide moisture, UV and salt resistance for outdoor capability.
SonicGuard™ Dynamic SonicGuard™ protection on the high frequency section minimizes 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 swivel (pan) / tilt wall-mount bracket is included, plus ten M6 inserts on the back panel fit the spacing of common third-party mounting brackets, or can be utilized to suspend the speaker using forged shoulder steel eyebolts or swivel mounting rings, providing installation versatility. CBT 70J-1 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 in the harshest conditions. Available in black or white (-WH).
CBT 70J-1 Two-Way Line Array Column with Asymmetrical Vertical Coverage
Specifications: System: Components: Four 130 mm (5 in) LF drivers Sixteen 25 mm (1 in) HF drivers Frequency Range (-10 dB)1: 60 Hz – 20 kHz Coverage: Vertical (selectable via switch) Narrow Mode: 25° (2 kHz - 16 kHz) (±10°) Broad Mode: 45° (750 Hz - 16 kHz) (±10°) Horizontal 150° (500 Hz – 8 kHz, ±20°) Sensitivity (2.83V@ 1m)1: Narrow: (speech mode) 98 dB (1 kHz - 8 kHz) (music mode) 93 dB (300 Hz - 18 kHz) Broad: (speech mode) 96 dB (1 kHz - 8 kHz) (music mode) 92 dB (300 Hz - 18 kHz) Nominal Impedance: 8 ohms Power Capacity2: 500 W (2000 W peak), 2 hrs 350 W (1400 W peak), 100 hrs Max SPL3: Narrow: (speech mode) 125 dB cont ave (131 peak) (music mode) 120 dB cont ave (126 peak) Broad: (speech mode) 123 dB cont ave (129 peak) (music mode) 119 dB cont ave (125 peak) Transducers: Low Frequency Drivers: 4 pcs, 130 mm (5 in) drivers, dual magnet neodymium, 38 mm (1.5 in) voice coil, damped blended textile surround, coated diaphragm for moisture, UV, and salt resistance, shielded. High Frequency Drivers: 16 pcs, 25 mm (1 in) drivers, dual magnet neodymium, encased magnet and coated diaphragm for moisture, UV and salt resistance, shielded. Enclosure: Enclosure: Fiberglass reinforced ABS cabinet, painted aluminum grille Outdoor Capability: IP-54 rated, per IEC529. UV, moisture and salt-spray resistant. Colors: Black or white (-WH) Insert Points: 10 M6 swivel (pan)/tilt (16 mm deep) insert points on back panel. Mounting: Included swivel (pan)/tilt wall bracket provides continuously variable +/-80 degree left-right swivel aiming (at no up/down tilt -- see Bracket Guide for maximum swivel range at various up/down tilt angles), continuously variable +/-15 degree tilt, as well as 5 degree fixed increment points. Ten threaded mounting points located on back panel of cabinet conform to industry standard rectangular 127 x 70 mm (5.0 x 2.75 in) pattern for OmniMount® 60.0 and other compatible third-party brackets. Threaded mounting points can be utilized for suspension. Dimensions (H x W x D): 694 x 170 x 237 mm (27.4 x 6.7 x 9.3 in) Net Weight: 9.5 kg (21 lb) Included Accessories: Swivel (pan) / tilt wall bracket Optional Accessories: MTC-PC2 terminal panel cover MTC-CBT-SMB1 Stand-Mount Bracket for use with 35 mm heavy duty speaker stand MTC-CBT-FM2 flush-mount low-profile wall-mount bracket Full space IEC standard, full bandwidth pink noise with 6 dB crest factor. Calculated based on power rating and measured sensitivity, exclusive of power compression.
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JBL continually engages in research related to product improvement. Changes introduced into existing products without notice are an expression of that philosophy.
CBT 70J-1 Two-Way Line Array Column with Asymmetrical Vertical Coverage
Broad Setting
Narrow Setting Horizontal 1/3 Octave Polars
0° 0
330°
0° 0
330°
30°
-6
30°
-6
300°
300°
60°
60°
200 Hz
200 Hz
250 Hz 270°
240°
250 Hz 270°
90°
315 Hz
400 Hz
400 Hz
240°
120°
210°
90°
315 Hz
120°
210°
150° 180° 0° 0
330°
150° 180° 0° 0
330°
30°
-6
30°
-6
300°
300°
60°
60°
500 Hz
500 Hz
630 Hz 270°
240°
630 Hz 270°
90°
800 Hz
1 kHz
1 kHz
240°
120°
210°
90°
800 Hz
120°
210°
150° 180° 0°
330°
0
150° 180° 0°
330°
30°
-6
0
30°
-6
300°
300°
60°
60°
1.25 kHz
1.25 kHz
1.6 kHz 270°
240°
90°
2 kHz
2 kHz
2.5 kHz
2.5 kHz
240°
120°
210°
1.6 kHz 270°
90°
120°
210°
150° 180° 0°
330°
0
150° 180° 0°
330°
30°
-6
0
30°
-6
300°
300°
60°
60°
3.15 kHz
3.15 kHz
4 kHz 270°
240°
90°
5 kHz
5 kHz
6.3 kHz
6.3 kHz
240°
120°
210°
4 kHz 270°
90°
120°
210°
150° 180° 0°
330°
0
150° 180° 0°
330°
30°
-6
0
30°
-6
300°
300°
60°
60°
8 kHz
8 kHz
10 kHz 270°
240°
120°
210°
150° 180°
10 kHz 270°
90°
90°
12.5 kHz
12.5 kHz
16 kHz
16 kHz
240°
120°
210°
150° 180°
Broad Setting
Narrow Setting Vertical 1/3 Octave Polars
90° 120°
90° 120°
60°
150°
60°
150°
30°
30°
200 Hz
200 Hz
250 Hz 180°
-6
250 Hz 180°
0°
0
-6
315 Hz
0°
0
315 Hz
400 Hz
210°
400 Hz
210°
330°
240°
330°
240°
300° 270° 90°
120°
300° 270° 90°
120°
60°
150°
60°
150°
30°
30°
500 Hz
500 Hz
630 Hz 180°
-6
630 Hz 180°
0°
0
-6
800 Hz
0°
0
800 Hz
1 kHz
210°
1 kHz
210°
330°
240°
330°
240°
300° 270° 90°
120°
300° 270° 90°
120°
60°
150°
60°
150°
30°
30°
1.25 kHz
1.25 kHz
1.6 kHz 180°
-6
0
1.6 kHz 180°
0°
-6
2 kHz
0
0° 2 kHz
2.5 kHz
210°
210°
330°
240°
2.5 kHz
330°
240°
300° 270° 90°
120°
300° 270° 90°
120°
60°
150°
60°
150°
30°
30°
3.15 kHz
3.15 kHz
4 kHz 180°
-6
0
4 kHz 180°
0°
-6
5 kHz
0
0° 5 kHz
6.3 kHz
210°
210°
330°
240°
6.3 kHz
330°
240°
300° 270° 90°
120°
300° 270° 90°
120°
60°
150°
60°
150°
30°
30°
8 kHz
8 kHz
10 kHz 180°
-6
0
10 kHz 180°
0°
-6
12.5 kHz
0
0°
16 kHz
210°
330°
240°
300° 270°
12.5 kHz 16 kHz
210°
330°
240°
300° 270°
CBT 70J-1 Two-Way Line Array Column with Asymmetrical Vertical Coverage
Broad Setting
Narrow Setting
Frequency Response:
Frequency Response: 40
100
40
90
30
90
30
80
20
80
20
70
10
70
10
60 20
100
1000
10000
SPL (dB)
100
0 20000
60 20
100
Frequency (Hz)
Beamwidth:
-6 dB Beamwidth (degrees)
Vertical 10 20
100
1000
10000
Vertical 10 20
20000
100
10
10
100
1000
10000
Directivity Index (DI), dB
100
Directivity Factor (Q)
Directivity Index (DI), dB
Directivity, Q
20
1 20000
20
100
10
10
0 20
100
Frequency (Hz)
10 deg 20 deg
-10
30 deg 40 deg
-20
100
1000
10000
Attenuation (dB)
Attenuation (dB)
0 deg
0
0 deg
0
10 deg 20 deg
-10
30 deg 40 deg
-20
-30
20000
20
100
1000
10000
20000
Frequency (Hz)
Vertical Off-Axis Frequency Response, Down
Vertical Off-Axis Frequency Response, Down 10
0 deg
0
10 deg 20 deg
-10
30 deg 40 deg
-20
100
1000
10000
Attenuation (dB)
10
Attenuation (dB)
1 20000
10
Frequency (Hz)
10 deg 20 deg
-10
30 deg 40 deg
-20
-30
20000
0 deg
0
20
100
Frequency (Hz)
1000
10000
20000
Frequency (Hz)
Horizontal Off-Axis Frequency Response
Horizontal Off-Axis Frequency Response 10
0 deg
0
10 deg 20 deg
-10
30 deg 40 deg
-20
100
1000
Frequency (Hz)
10000
20000
Attenuation (dB)
10
Attenuation (dB)
10000
Vertical Off-Axis Frequency Response, Up
10
20
1000
Frequency (Hz)
Vertical Off-Axis Frequency Response, Up
-30
1000
Frequency (Hz)
Directivity, Q
20
20000
Horizontal
Frequency (Hz)
-30
10000
100
Directivity Factor (Q)
-6 dB Beamwidth (degrees)
Horizontal
20
0 20000
360
100
-30
10000
Beamwidth:
360
0 20
1000
Frequency (Hz)
0 deg
0
10 deg 20 deg
-10
30 deg 40 deg
-20
-30
20
100
1000
Frequency (Hz)
10000
20000
Ohms
“Music” Mode (solid); “Speech” Mode (dotted), 1W (2.83V), 1m, and Impedance
Ohms
SPL (dB)
“Music” Mode (solid); “Speech” Mode (dotted), 1W (2.83V), 1m, and Impedance
CBT 70J-1 Two-Way Line Array Column with Asymmetrical Vertical Coverage Dimensions: Dimensions in mm [in]
70 [2.75] 170 [6.7]
237 [9.3] 94 [3.7]
127 [5.0]
127 [5.0]
694 [27.4]
127 [5.0]
127 [5.0]
M6x1.0P (10 places) 165 [6.5]
Wall Bracket Ø7.2 [Ø0.3]
70 [2.75]
208.4 [8.2]
88 [3.5] Ø6.5 [Ø0.26]
Tilt Angle Adjustment: Slot ( ±15°, continuous ) Pre-Set Angles ( 5° increments )
254 [10.0]
Toward Wall
Toward Loudspeaker
177 [7.0]
Wall-mouting ear (x4)
Loudspeaker-Mount Section
Assembled Bracket
Wall-Mount Section
JBL Professional 8500 Balboa Boulevard, P.O. Box 2200 Northridge, California 91329 U.S.A. © Copyright 2011 JBL Professional www.jblpro.com
SSCBT70J-1 04/11
