Any of the high end receivers rated as THX Ultra or Ultra 2 can handle 4 ohm speakers. I would also strongly suggest a receiver with a large toroidal power supply. At 130 watts, I am going to guess that your receiver is rated as THX Select and does not have a toroidal PS, which can technically handle nominal 4 ohm loads, but probably not with much aplomb.
Even a THX Utlra 2 rated receiver with a toroidal transformer will not drive the Thiels with the same ease as a dedicated 2 channel high current integrated or separate power amp of the same wattage rating. In order to fit all those electronics in the same chassis, corners have to be cut somewhere, not to mention noise introduced by having DACs in the box.
Even a THX Utlra 2 rated receiver with a toroidal transformer will not drive the Thiels with the same ease as a dedicated 2 channel high current integrated or separate power amp of the same wattage rating. In order to fit all those electronics in the same chassis, corners have to be cut somewhere, not to mention noise introduced by having DACs in the box.