Buzz Audio ma-2.2stereo microphone preamp - Manual (Page 4)

3
2] Connections.
•
Mic Input.
The MA 2.2 is designed as a balanced input microphone amplifier.
The connection of unbalanced sources is not recommended. The
XLR female style input connector is wired as follows;
Pin 1 = Signal Ground (common)
Pin 2 = Signal Hot (+)
Pin 3 = Signal Cold (-)
• Output.
The MA 2.2 has two output connectors. In standard configuration
the output is unbalanced to avoid the extra amplifier stage required
and maintain the shortest possible internal signal path.
The XLR male style output connector is wired as follows;
Pin 1 = Chassis Ground
Pin 2 = Signal Hot (+)
Pin 3 = Signal Ground (common)
If the optional output transformer is fitted (see the section on
Options) the XLR is wired as follows;
Pin 1 = Chassis Ground
Pin 2 = Signal Hot (+)
Pin 3 = Signal Cold (-)
In both cases, the 3 pole ¼” jack socket always carries the
unbalanced output, as follows;
Tip = Signal Hot (+)
Ring = Signal Ground (common)
Sleeve = Chassis Ground
•
Please Note…
The Chassis Ground connection is intended for connecting cable
SHIELDS. When connecting the MA 2.2 output to other devices, it is
not always necessary to connect the shield at both ends of the
cable. This may help prevent earth loops occurring. The mic input
Signal Ground however is always connected at both ends to ensure
correct shielding of the cable and mic body.
The Signal Ground source can be selected HARD or SOFT, see the
Controls and Indicators section.
MA 2.2 USERS MANUAL VERSION-1 PAGE 3