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4.1.4 ELECTRICAL BENEFITS
Built in digital signal processing, power amplification, and protective
limiting significantly reduces equipment costs, space, installation,
and set-up adjustments. Cabling is limited to providing AC mains, line
level audio, and computer control signals. EIA-485 or optional
CobraNet™/Ethernet networking technology allows all loudspeakers in a
project to be adjusted and controlled from one computer. EIA-485
network topology was chosen as the supplied default because it is easy
to implement. It is also unique in allowing multiple network nodes to
communicate bi-directionally over a single pair of twisted wires. No
other network standard combines this capability with equivalent noise
rejection, data rate, cable length, and general robustness.
4.2 Features
4.2.1 ACOUSTICAL
·Vertical beamwidth is software controlled on-site to fit the application
·Wide 120 degree fixed horizontal beamwidth
·Pre-determined templates for loudspeaker clusters provide a wide
range of capabilities
·DSA250 full-range loudspeaker has eight 4 in LF drivers, eight 1 in
horn-loaded HF drivers
·DSA230 low frequency or voice-only loudspeaker has eight 4 in LF drivers
·Full frequency response and high output for music applications
·Extended pattern control and higher outputs at lower frequencies
using additional DSA230’s
·Exceptional intelligibility for reverberant rooms
4.2.2 ELECTRONIC
· Self-powered requiring wiring for AC power, line level audio, and
computer control
· No amplifier or processing racks needed, reducing space and cost
· Individual amplifier and DSP for each transducer
· Convection cooled electronics eliminates noisy cooling fans
· Built-in driver protection provides high reliability
· Two audio inputs allow summed stereo or priority announcement
override capability
· Electronically balanced inputs maximize the signal to noise ratio
4.2.3 COMPUTER CONTROL
· User-friendly DSAPilot software easily creates desired vertical
coverage patterns
· DSP adjusted and optimized by DSAPilot for plug and play setup
· User adjustable input EQ, signal delay, level, HPF/LPF, and
compression for each loudspeaker cluster
· Computer can be disconnected for no-tamper operation
· Computer can be left connected for monitoring purposes
4.2.4 NETWORKING
·EIA-485 network for remote PC operation and computer control
·Analog audio and control signals can be daisy-chained to multiple
loudspeakers
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AUDIO A
AUDIO B
DSA250
INPUT DSP
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DSA230
Figure 4.1.4 DSA Block Diagrams