Audiostatic dci speakers one distorting at low volume

Hi there have bought a pair of audiostatic dci speakers .Played well for a few days then distortion and not playing loudly.
Mine are a factory pair does any one have any dissasembley info safety advice as i wish to repair mine
i can cannot find a schematic or any safety details as to safety ie hv section wire which wires not to touch etc.
I have tried to contact ben peters at audiostatic but no reply at all .Regards Alrick (spades)