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CONTENTS
7
When connecting Blackline systems to an amplifier, it is recommended that
the return resistance of the cable used is less than one tenth of the nominal
impedance of the system or systems in parallel. The table below gives an
indication of the maximum permissible cable runs for various conductor
cross-sectional areas.
Conductor CSA
1.0mm
2
1.5mm
2
2.0mm
2
2.5mm
2
4.0mm
2
6.0mm
2
8
There are many different system combinations possible with the Blackline
Series. Shown below are some typical configurations. The number of full-
range or mid/high systems required to match the efficiency of one sub-bass
system is shown as a recommended cabinet ratio (RCR). Please note that
for simplicity only the left channel is shown and that each line in the
diagram represents a pair of wires.
8.1
F12/F15 Full-range
Because the F12 and F15 are passive systems embodying correct acoustic
design principles, they can be used without a controller provided
recommended amplifier power is not exceeded and care is taken to avoid
amplifier clipping. Use of an optional M3 controller with its system-specific
low frequency EQ and built-in limiters will result in improved bass response
and system protection.
Left In
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CABLE LENGTHS
4 ohms
11m
17m
22m
29m
44m
66m
SYSTEM CONFIGURATIONS
Passive systems
Optional M3 Controller
M3-F12-F15
Martin Audio – Blackline Series
Maximum Cable Run
8 ohms
22m
34m
44m
58m
88m
132m
Ch2 Out
Amplifier
8
GUIDES
16 ohms
44m
68m
88m
116m
176m
264m
F12/F15
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