Related Manuals for JBL CBT 50LA
Summary of Contents for JBL CBT 50LA
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Page 1: Quick Start Guide
Quick Start Guide for Sound System Designers JBL CBT Series Constant Beamwidth Technology™ Column Loudspeakers (Note: Some models shown with the included grilles removed to illustrate driver composition.) Rev A3... -
Page 2: Table Of Contents
Frequency Response Charts • Room Sizes Shown Example #1 – Flat Listening Plane CBT 50LA ........................4 CBT 100LA in Broad Setting ................... 5 CBT 100LA in Narrow Setting ..................6 CBT 70J in Broad Setting ....................7 CBT 70J in Narrow Setting ....................8 CBT 70J+70JE in Broad Setting .................. -
Page 3: Understanding The Charts
CBT Quick Start Guide 3 Excellent coverage of a wide variety of room types can be accomplished using JBL’s CBT Line Array Column Loudspeakers. This guide shows some starting-point examples of placement, aiming and resulting performance of the various CBT models in a variety of simplified sectional-view examples. There are 16 simulations in total, comprised of 4 examples of room-size / seating-plane scenarios. -
Page 4: Example #1 - Flat Listening Plane
Listening Plane = 1.2 m (4 ft) above the floor Mic Placement = 6.1 m (20 ft, red icon), 10.7 m (35 ft, blue icon) and 16.8 m (55 ft, green icon) CBT 50LA Trim Height = 3.4 m (11 ft , Top of Speaker) Down Tilt = 10°... -
Page 5: Cbt 100La In Broad Setting
CBT Quick Start Guide 5 Example #1 -- Flat Listening Plane CBT 100LA in Broad Setting Trim Height = 4.9 m (16 ft , Top of Speaker) Down Tilt = 15° Vertical Coverage Setting = Broad (Full rated power, low-Z, SPEECH setting, 4 kHz, scale in feet) SPL Range 4 kHz Frequency Response... -
Page 6: Cbt 100La In Narrow Setting
CBT Quick Start Guide 6 Example #1 -- Flat Listening Plane CBT 100LA in Narrow Setting Trim Height = 3.4 m (11 ft, Top of Speaker) Down Tilt = 10° Vertical Coverage Setting = Narrow (Full rated power, low-Z, SPEECH setting, 4 kHz, scale in feet) SPL Range 4 kHz Frequency Response... -
Page 7: Cbt 70J In Broad Setting
CBT Quick Start Guide 7 Example #1 -- Flat Listening Plane CBT 70J in Broad Setting Trim Height = 4 m (13 ft , Top of Speaker) Down Tilt = 5° Vertical Coverage Setting = Broad (Full rated power, low-Z, SPEECH setting, 4 kHz, scale in feet) SPL Range 4 kHz Frequency Response... -
Page 8: Cbt 70J In Narrow Setting
CBT Quick Start Guide 8 Example #1 -- Flat Listening Plane CBT 70J in Narrow Setting Trim Height = 3.7 m (12 ft, Top of Speaker) Down Tilt = 5° Vertical Coverage Setting = Narrow (Full rated power, low-Z, SPEECH setting, 4 kHz, scale in feet) SPL Range 4 kHz Frequency Response... -
Page 9: Cbt 70J+70Je In Broad Setting
CBT Quick Start Guide 9 Example #1 -- Flat Listening Plane CBT 70J+70JE in Broad Setting Trim Height = 5.5 m (18 ft, Top of Speaker) Down Tilt = 10° Vertical Coverage Setting = Broad (Full rated power, low-Z, SPEECH setting, 4 kHz, scale in feet) SPL Range 4 kHz Frequency Response... -
Page 10: Cbt 70J+70Je In Narrow Setting
CBT Quick Start Guide 10 Example #1 -- Flat Listening Plane CBT 70J+70JE in Narrow Setting Trim Height = 3.7 m (12 ft, Top of Speaker) Down Tilt = 5° Vertical Coverage Setting = Narrow (Full rated power, low-Z, SPEECH setting, 4 kHz, scale in feet) SPL Range 4 kHz Frequency Response... -
Page 12: Cbt 100La In Broad Setting
CBT Quick Start Guide 14 Example #3 –Gentle Rake with Balcony Description – This example is also common for performance spaces and auditoriums. Shown are the CBT 100LA, CBT 70J and the CBT 70J+70JE combination. All are set at the Broad Vertical Coverage setting. Listening Planes = Main: Rise of 0.6 m (2 ft) in 9.1 m (30 ft) of depth, beginning 1.2 m (4 ft) above the floor. -
Page 13: Cbt 70J In Broad Setting
CBT Quick Start Guide 15 Example #3 – Gentle Rake with Balcony CBT 70J in Broad Setting Trim Height = 4.6 m (15 ft, Top of Speaker) Down Tilt = 0° Vertical Coverage Setting = Broad (Full rated power, low-Z, SPEECH setting, 4 kHz, scale in feet) SPL Range 4 kHz Frequency Response... - Page 14 CBT Quick Start Guide 16 Example #3 – Gentle Rake with Balcony CBT 70J+70JE in Broad Setting Trim Height = 5.2 m (17 ft, Top of Speaker) Down Tilt = 0° Vertical Coverage Setting = Broad (Full rated power, low-Z, SPEECH setting, 4 kHz, scale in feet) SPL Range 4 kHz Frequency Response...
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Page 15: Cbt 100La In Broad Setting
CBT Quick Start Guide 17 Example #4 –Three-Tiered Raked, Large Room Description –This is a larger room with a depth of 39.6 m (130 ft). The room could represent a venue with dual balcony or it could represent an auditorium with a front section having a gentle rake and a back having a steeper rake. -
Page 16: Cbt 70J In Broad Setting
CBT Quick Start Guide 18 Example #4 – Three-Tiered Raked CBT 70J in Broad Setting Trim Height = 7.6 m (25 ft, Top of Speaker) Down Tilt = 5° Vertical Coverage Setting = Broad (Full rated power, low-Z, SPEECH setting, 4 kHz, scale in feet) SPL Range 4 kHz Frequency Response... -
Page 17: Cbt 70J+70Je In Broad Setting
CBT Quick Start Guide 19 Example #4 – Three-Tiered Raked CBT 70J+70JE in Broad Setting Trim Height = 7.6 m (25 ft, Down Tilt = 5° Top of Speaker) Vertical Coverage Setting = Broad (Full rated power, low-Z, SPEECH setting, 4 kHz, scale in feet) SPL Range 4 kHz Frequency Response... -
Page 18: Design Conclusions
CBT Quick Start Guide 20 Design Conclusions Vertical Coverage Setting vs. Installation Height – In general, when the CBT speaker is set to the Narrow vertical coverage setting, the speaker tends to cover best when installed fairly low and angled at a fairly narrow down-tilt angle in relation to the seating plane. -
Page 19: How Far Each Cbt Model "Throws
It may also be noted from the chart that while CBT 70J + 70JE produces greater low frequency SPL and extended bass response, the mid-range throw is the same as the 70J by itself. Applications Assistance -- More CBT applications assistance is available at JBL Professional’s website www.jblpro.com or by calling JBL Pro installed-sound technical assistance (818) 894-8850.