Electric Guitar/Bass - RODE Microphones NT1-A Instruction Manual

Perhaps a good beginning would be to place the
pop filter directly in front of the vocalist, and about
15cm away from the microphone. (Remember that
the front of the microphone is indicated by the gold
dot). This will assist in keeping the performer at a
constant minimum distance from the microphone
and helps to maintain reasonable recording levels.
Experimentation should be made with the angle
from which the microphone is addressed as
different results can be achieved when the vocalist
is 'off-axis'. (Note: ON axis = addressing the
microphone directly towards the gold dot).

Electric Guitar/Bass:

To mic-up a Guitar or Bass Amplifier (as opposed
to Direct Injection of that instrument) a microphone
may be placed close to the loudspeaker of
the amplifer, directed slightly to the side (off axis)
of the speaker.
Note:
In the absence of a Pad, it may be necessary to
move the microphone further from the speaker to
avoid distortion when loud volume is used.