Constellation Audio Perseus Phono Preamplifier - Manual (Page 9)

9
7. Chassis ground
The chassis ground terminal is one of two ground terminals provided on the Perseus. Two separate
grounds provide more grounding options and will allow you to reduce hum to an absolute minimum.
Typically the chassis ground will be connected to the ground terminal on the turntable or the motor,
while the other ground terminal (signal ground) will be connected to the tonearm. However, you may
find that you get less hum by connecting the chassis ground to the center plate screw on the AC outlet,
and grounding both the tonearm and and turntable to the signal ground. Experiment and go with
whatever configuration gives the best results.
8. Signal ground
The signal ground terminal is one of two ground terminals provided on the Perseus. Two separate
grounds provide more grounding options and will allow you to reduce hum to an absolute minimum.
Typically the signal ground will be connected to the ground terminal on the tonearm, while the other
ground terminal (chassis ground) will be connected to the turntable or motor. However, you may find
that you get less hum by connecting both the tonearm and the turntable to the signal ground, and
connecting the chassis ground to the center plate screw on the AC outlet. Experiment and go with
whatever configuration gives the best results.