Loud pop with UCD when switching on

Hi,

I am using UCD180 with coldamp PSU. I use the /on with a relay to contol standby/active. But everytime the module is wakeup from standby mode, there is a loud pop.

Anyway to avoid it?
Is it due to the imbalance of +ve and -ve rails from the coldamp PSU?

ackcheng

Pls see the link
http://www.hififever.com/forum/viewtopic.php?t=1214&highlight=

Also see this one :

http://www.hififever.com/forum/viewtopic.php?t=1213&highlight=

Thanks. Turning the module off is OK. But the problem is turning it on. When /on is pull to GND, I can hear a loud "pop" 1 -2 seconds later.