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CONTENTS
Each EMX1A output has an associated limiter which provides momentary
gain reduction when that output signal level exceeds a preset threshold.
Internal PCB mounted jumper plugs J1 - J4 select the thresholds for the
particular EM Series loudspeaker system being used.
The higher recommended power amplifier setting should only be used by
experienced users to provide enhanced headroom on short duration peaks
and should not be used to push the system for a continuous higher sound
pressure level which will result in drive unit failure.
Onset of limiting is indicated by front panel LED's and determined by
sensing the actual voltage applied to the loudspeaker. The sense inputs on
the rear panel should be connected as shown in Fig 3. If no sense
connection is made or if the connection is broken at any time, the output
level will automatically be attenuated by 20dB and the limit LED for the
output concerned will light continuously to alert the operator.
SYSTEM
1 x EM15 (16 ohm)
1 x EM15 (16 ohm)
1 x EM15 (4 ohm)
2 x EM15 (16 ohm)
2 x EM15 (16 ohm)
3 x EM15 (16 ohm)
3 x EM15 (16 ohm)
4 x EM15 (16 ohm)
4 x EM15 (16 ohm)
1 x EM26 (8 ohm) or
2 x EM26 in parallel (4 ohm) RCH F/R
1 x EM56 (8 ohm) or
2 x EM56 in parallel (4 ohm) RCH F/R
1 x EM76 (8 ohm) or
2 x EM76 in parallel (4 ohm) RCH F/R
1 x EM120 (8 ohm)
1 x EM120 (8 ohm)
1/2 x EM150 (8 ohm)
1/2 x EM150 (8 ohm)
1 x EM150 (4 ohm)
1 x EM150 (4 ohm)
1 x EM201 (8 ohm) or
2 x EM201 in parallel (4 ohm) RCH Sub
EM251 (4 ohm)
EM251 (4 ohm)
Table Note: As supplied by the factory, jumpers J1-J4 are each set in the
appropriate position for the EM26 full-range system and EM201 sub-bass
powered with the recommended rating below. Should amplifiers of higher
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OUTPUT
LCH F/R
RCH F/R
No protection can be offered
LCH F/R
RCH F/R
LCH F/R
RCH F/R
LCH F/R
RCH F/R
LCH F/R
LCH F/R
LCH F/R
LCH Sub
RCH Sub
LCH Sub
RCH Sub
LCH Sub
RCH Sub
LCH Sub
LCH Sub
RCH Sub
Martin Audio – EMX1A System Controller
JUMPER
JUMPER
NUMBER
POSITION
J3
1 (2)
J4
1 (2)
J3
1 (2)
J4
1 (2)
J3
1 (2)
J4
1 (2)
J3
1 (2)
J4
1 (2)
J3
1 (2)
J4
1 (2)
J3
2 (3)
J4
2 (3)
J3
3 (4)
J4
3 (4)
J1
1 (2)
J2
1 (2)
J1
1 (2)
J2
1 (2)
J1
1 (2)
J2
1 (2)
J1
3 (4)
J2
3 (4)
J1
3 (4)
J2
3 (4)
6
GUIDES
AMPLIFIER
POWER
INTO 4 OHMS
300 (400) watts
300 (400) watts
75 watts
300 (400) watts
300 (400) watts
300 (400) watts
300 (400) watts
300 (400) watts
300 (400) watts
300 (400) watts
300 (400) watts
400 (550) watts
400 (550) watts
550 (800) watts
550 (800) watts
400 (500) watts
400 (500) watts
400 (500) watts
400 (500) watts
400 (500) watts
400 (500) watts
550 (900) watts
550 (900) watts
550 (900) watts
550 (900) watts
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