Each EMX2A 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 - J6 select the thresholds for the
particular EM Series loudspeaker system being used.
Note: As supplied by the factory, jumper links J1-J6 are each set in the
appropriate position for the EM186 full-range system and EM201 sub-bass
powered with the recommended rating below. Should amplifiers of higher
rating be used, the limiter positions shown in brackets should be used as
indicated by the table below to increase the associated limiter thresholds.
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.
SYSTEM
OUTPUT
JUMPER POSITION
AMPLIFIER
POWER
INTO 4 OHMS
EM186
LCH Bass
J3
2 (3)
500 (700) watts
RCH Bass
J4
2 (3)
500 (700) watts
LCH Mid/High J5
2 (3)
400 (550) watts
RCH Mid/High J6
2 (3)
400 (550) watts
EM201/251
LCH1 Sub
J1
1 (2)
550 (900) watts
RCH2 Sub
J2
1 (2)
550 (900) watts
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.
Amplifier gain controls should normally be set at maximum. If a single
EMX2A output is used to drive several amplifier channels with different gain
settings, the sense input should be connected to the channel with the
highest setting.
WARNING: Connections to the EMX2A sense sockets should only be made
using approved shrouded plugs to comply with European safety standards.
No other plug is recommended or endorsed.
Martin Audio – EMX2A System Controller
E
NGLISH
6
CONTENTS
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GUIDES
