EM Acoustics M-12 passive/biamp stage monitor - Manual (Page 7)

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M-12 User Manual
www.emacoustics.co.uk
M-12 MONITORS IN USE
The M-12 monitors were designed to deliver unprecedented performance without the expensive requirement of
active controllers and dual amplifier channels. Although the M-12 monitors can be used in biamplified format, EM
Acoustics recommend use in passive format as this is how they were intended to be used.
STAGE ORIENTATION
The M-12 is supplied as left & right-handed pairs. As the low and high frequency components sit side by side on
the baffle, the two versions are mirror images of each other. It is the monitor engineer or artist’s preference as to
whether the enclosures are arranged horns-in or horns-out when used in pairs – as these two different
arrangements will give a different sonic image. To arrange horns-out (which is what EM Acoustics recommend for
the most balanced and even response), look at the front face of the enclosure with the product label and ports.
The HF drive unit sits on the side of the enclosure with the ports on – and as such you would arrange the
enclosures “ports-out”. As a starting position, we would suggest positioning the monitors half a metre apart,
angled in at about thirty degrees (Fig 1).
BI-AMPLIFIED OPERATION
On the front panel of the M-12, beside the connector/label panel is a machined slot. Using a screwdriver, the
switch concealed inside this slot can be operated to change the M-12 from passive to bi-amp operation. In bi-amp
mode, pins 1+/1- connect to the LF drive unit, and pins 2+/2- connect to the HF unit. You will need two amplifier
channels and an external DSP processor. Please contact EM Acoustics directly for the appropriate settings for your
M-12 as they depend on the amplifier and DSP processor being used.