Hello.
My system comprises of a Unitilite connected to NAP 250DR connected to speakers Harbeth 30.2 xd via naim speaker cables.
The speakers are new and today I attempted to set them up.
Because I changed the position of the system in the house, I disconnected the whole system and reassembled and reconnected it elsewhwere.
When the speakers are connected to the NAP there is no sound whatsoever, although there is a humming sound.
When the speakers are connected directly to the Unitilite (the NAP is not connected), they work perfectly with no humming sound (signal ground position at floating)
In addition to the above please note that the last thing I did before disconnecting and reconnecting my system was to upgrade the version of my Unitilite to version v. 4.7.00. Before this upgrading and before disconnecting the system, I had no problems. The Unitilite and Nap worked together just fine. The previous speakers were Harbeth P3esr.
I connect the Unitilite (preamp output) to the NAP input using the dedicated cable.
Has anyone got some advice for a solution to this problem and how to eliminate the humming noise when NAP is connected (when NAP is switched off and Unitilite is still on there is no humming noise, nor there is any noise using just the Unitilite).
Regards