EM Acoustics ST-215, Product User Manual

Page: 40 / 57

Page 40 of 57
ST-215 User Manual
v2 November 2019
7.1.3 – Amplifier Requirements
The ST-215 is a very powerful subwoofer, making use of some of the most advanced drive
units available in the industry today. 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
ST-215 2000W @ 4 ohms 4000W @ 4 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 ST-215, however
the DQ6 and DQ10 are lower power models and as such will not provide maximum power
for the subwoofer.
The following table shows the maximum number of ST-215 that can be connected per
channel on the various different amplifiers:
Amplifier Max ST-215 per channel
DQ6 1*
DQ10 1*
DQ20 2
* - The DQ6 and DQ10 do not provide sufficient power for maximum headroom for the ST-
215 and as such should only be used in lower SPL environments.
7.1.4 – Processing Requirements
The ST-215 requires active high and low pass filters, and appropriate limiter settings. If
not using DQ Series amplifiers, or the DSC48 Digital System Controller, then a suitable DSP
system must be used in conjunction with your ST-215 to prevent damage to the
subwoofer. Check the EM Acoustics website for the most up-to-date DSP settings for the
ST-215.