The U-47’s output was 5dB hotter in Cardioid mode than in Omni,
because the capsule’s rear diaphragm was bypassed in Cardioid mode,
avoiding the capacitance loss of having it in the circuit
Also, the Proximity effect of the Grille (the cardioid pattern will sound
fuller and than the omni pattern) is normal for this type of microphone. In
fact, the Proximity effect works very well and is a much desired effect.
Mounting
A special shock mount/stand adapter is provided and should always be
used to mount the microphone on floor stands or booms. The clamp of
the shock-mount should be guided from the lower end of the microphone
upwards until it is placed near the gravitational centre (slightly below the
badge or centered over the badge). The shock mount is designed for use
with stands or booms using standard thread sizes. It may also be
swiveled against the stand axis to suit the recording angle.
Powering up
The required PSU is included with the microphone. The connector type
and size are clearly marked. using the supplied CM7 microphone cable.
The audio signal is taken from the power supply via a standard XLR-type
mic cable.
After interconnection of the microphone and AC line, the main switch may
be turned on. Operating condition is indicated by the power lamp.
The warm-up time of the CM7 is approximately one minute. When your
CM7 is new, a 24 hour burn-in period is recommended.
The CM7’s tube will “break in” over a period of time enabling the CM7 to
sound subtly better over a period of time.
The CM7 Power Supply
This PSU supplies the microphone with the 5-volt filament and 105V plate
voltage for the vacuum tube,
3
