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EMS-51 User Manual
v2 November 2019
6.1.3 – Amplifier Requirements
The EMS-51 is a highly efficient loudspeaker, however appropriate available power is
critical to ensure full system headroom. It is good practice to ensure that your amplifier
can deliver at least double the RMS power handling of the loudspeaker to ensure full
headroom, and as such the amplifier requirement is:
Product
RMS Power Handling
Recommended Min. Amplifier Power
EMS-51
200W @ 8 ohms
400W @ 8 ohms
A loudspeaker is far more likely to be damaged by an under-powered amplifier working
too hard, than an over-powered amplifier working well within its limits.
All of the DQ Series advanced system amplifiers can be used to power the EMS-51.
The following table shows the maximum number of EMS-51 that can be connected per
channel on the various different amplifiers:
Amplifier
Max EMS-51 per channel
DQ6
4
DQ10
4
DQ20
4
6.1.4 – Processing Requirements
Whilst the EMS-51 is a passive loudspeaker and therefore requires no corrective
processing, in all but the lowest SPL applications it does require an active high pass filter
and appropriate limiter settings to avoid damage. If not using DQ Series amplifiers, or the
DSC48 Digital System Controller, then a suitable DSP system must be used in conjunction
with your EMS-51 to prevent damage to the loudspeaker. Check the EM Acoustics website
for the most up-to-date DSP settings for the EMS-51.
