These units have always sounded quiet - from the start I have been dissapointed as I bought them as they had good reviews in this area
The main base is plugged into a BT connection and wall socket - the other 2 are in base units attached to electric supply only.
Currently these are the only phones I have?
Apparently my line is OK
Will get back to you as nervous of unplugging everything as broadband etc attached will get husband involved! Thanks Suzy