JBL Professional Speaker - Manual (Page 3)

o
Generate Report –Click the Generate Report button. The report contains all the
information you provided as well as the speaker selections. To print the report, click File
and then Print.
Generating a Report -- The Report contains the same information shown on the Results screen on an easily
printable form.
o Printing -- Click File and then Print.
o Making Changes – To go back and make any changes, click on File and then Revise
Design. That takes you back to the Results page, from which you can go back and make
changes to any page by clicking the Previous button.
To adjust the design anywhere along the way, click the Back button.
INFORMATION
70V vs. Low-Impedance Speakers
CSC DEFAULTS TO 70V/100V (T-VERSION)SPEAKERS – Most distributed ceiling speaker
systems utilize 70V or 100V distributed system speakers. CSC defaults to 70V/100V speakers
unless one of the checkboxes for low impedance speakers are checked.
70V VS. 100V – The same JBL speakers can be used in either a 70V distributed systems, which is
typical within US, or a100V system, which is typical outside the US. The CSC software includes
all the taps available for either 70V or 100V. However, the lowest tap rating listed on the speaker
for 70V usage is usually not available for 100V systems. Before committing to using a speaker at
a low tap on a 100V system, make sure that model does indeed offer that tap for 100V use.
LOW IMPEDANCE SPEAKERS – Low-impedance refers to speakers in the 4 Ω to 16Ω range.
Advantages of low-impedance speakers include getting substantially louder than 70V/100V
speakers (not being limited by the 70V/100V transformer), and achieving a wider frequency
response. However, when using these speakers, impedance loading of the power amplifier must be
taken into consideration, usually restricting use to a maximum of 2 or 4 speakers per amplifier
channel (depending on the exact impedances of the speakers and the minimum-impedance capability
of the amplifier).
Layout Density
CSC lays out speakers on an edge-to-edge spacing density, which is the most common and most
economical density. In edge-to-edge spacing, there is very little overlap in coverage from adjacent
speakers. While CSC is locked into an edge-to-edge density, tighter densities can be utilized to further
improve sound quality/spaciousness, to lower sound level variations within the room, and to increase
the maximum sound level capability of the system. For modeling tighter densities (Minimum Overlap
and Maximum Overlap densities) use JBL Pro’s DSD Distributed System Design software.
Listener Height
CSC uses a listener height of 4 feet (1.2 meters) and is not adjustable. This height is approximately
correct for either seated or standing listeners.