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Setup
Several features of the B-MA2 may be customised to user preference. To enter Setup
mode, hold the front-panel SEL button for approx. two seconds. The OLED display
will show the first adjustable parameter and its current value.
Further brief presses of the SEL button will step through the available parameters,
eventually looping back to the beginning. When the desired parameter is displayed,
use the Up and Down arrow buttons to modify the value of the parameter as
required.
To leave Setup mode, hold down the SEL button for two seconds once again. Setup
mode will also be automatically cancelled if no button is pressed for ten seconds.
Adjustments made in Setup mode are stored in non-volatile memory and will
continue to be applied until changed again. The available options are:
Channel 1/Channel 2 Gain
(default value: 30dB)
These set the gain of the microphone preamplifiers. Values from 30dB to 60dB are
available in steps of 3dB.
Ch1/Ch2 Phantom Enable
(default value: OFF)
These parameters disable (OFF) or enable (ON) phantom power to the microphone
inputs. The phantom voltage is as selected by the corresponding Phantom Voltage
option (see below).
Ch1/Ch2 Phantom Voltage
(default value: 12V)
These parameters select the voltage used when phantom power is enabled to the
corresponding channel. Available options are 12V and 48V – the 12V option should
be used whenever possible since the generation of 48V phantom power inevitably
has a deleterious effect on battery life.
Mic Highpass Filter
(default value: NONE)
An optional high-pass filter can be applied to the microphone signal.
Selecting SOME activates a first-order filter with a corner frequency of 100Hz.
Selecting LOTS activates a sharper second-order filter with the same cutoff
frequency.
