I owned the RWA Sig 30 for six months and then upgraded it to the RWA Sig 30.2, which I owned for six months. I was using them with Avantgarde Meta Primo (107 db efficient) horn loudspeakers. RWA's products were the best sounding solid-state amplifiers I used with my loudspeakers. They have tube like qualities.
"Has anyone got a real life experience comparing the Sig 30.2 to other expensive amps?"
Yes, the sound out of the RWA Sig 30 and Sig 30.2 was better than the BAT 300X (6922 version)integrated, First Watt Aleph J, Pass Aleph 3, Volksamp Aleph 30, and Avantgarde Model 5 in my system. Keep in mind mys system needs very little power. I ultimately sold my RWA Sig 30.2 because good tube amplifers just sound better with my loudspeakers. As much as the RWA Sig 30.2 sounds like tubes, it just can't do the things a very good SET tube amp can do (air and space). I owned the integrated version of the RWA Sig 30.2. Because of the high efficiency of my loudspeakers, the RWA Sig 30.2's volume steps were not fine enough. Often just one click would make the volume go from too soft to too loud. It was annoying as hell. If I had to go back to a solid-state amp I would probably go with the RWA 30.2 non-integrated version.
"Has anyone got a real life experience comparing the Sig 30.2 to other expensive amps?"
Yes, the sound out of the RWA Sig 30 and Sig 30.2 was better than the BAT 300X (6922 version)integrated, First Watt Aleph J, Pass Aleph 3, Volksamp Aleph 30, and Avantgarde Model 5 in my system. Keep in mind mys system needs very little power. I ultimately sold my RWA Sig 30.2 because good tube amplifers just sound better with my loudspeakers. As much as the RWA Sig 30.2 sounds like tubes, it just can't do the things a very good SET tube amp can do (air and space). I owned the integrated version of the RWA Sig 30.2. Because of the high efficiency of my loudspeakers, the RWA Sig 30.2's volume steps were not fine enough. Often just one click would make the volume go from too soft to too loud. It was annoying as hell. If I had to go back to a solid-state amp I would probably go with the RWA 30.2 non-integrated version.