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Amplifier choices and limiter settings
The following chart shows Martin Audio power amplifier choices (indicated by dots) and Martin Audio DX1.5 or
DX2 limiter settings (in red) to obtain optimal performance from the wide range of O-Line array sizes and
patch configurations possible.
Single channels, two channel and four channel configurations are shown. Multi‐channel configurations are
useful where zone control may be required.
To avoid amplifier clipping (which dumps excessive power into the HF arrays in the form of odd‐order
harmonics) it is best to choose the highest power amplifier in the range indicated. Note that power amplifiers
must be set to the industry standard maximum voltage gain of 32dB (x40) with a correctly limited DX1.5 or DX2
system controller to comply with warranty conditions.
(This chart is repeated full‐size on the next page for easy reference)
ClipLim settings
Martin Audio loudspeakers are AES power rated. AES ratings allow for up to 6dB voltage (4 x power)
instantaneous peaks. We therefore recommend that you set your DX1.5 or DX2 output channel ClipLims to
+6dB.
Controller presets?
Note that we do not publish fixed presets for the O-Line – apart from recommending a standard 60Hz high pass
filter and the required limiter settings. The O-Line Software – used to optimise the array shape – also
generates the controller settings required for a flat in‐situ system response or to meet your chosen house curve
using the Optimise EQ function.
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