Hi,
"is anyone using a integrated with a opus21?"
Yes, I have the Opus 21 & S30 system. They both sound fantastic. I have the Great Northern Sound Company reference modded versions of each, but I did demo the stock versions of each. I'm using them with Avantgarde Duo Primo horns (107 db efficient). The Opus 21 S30 integrated system uses a DIN connection, where the units are stacked and connected on top of each other. No expensive interconnects and only one powercord. You can get an extra sources unit that stacks in the system that gives you connections for extra sources, a phonostage and FM radio. It is very conveneient and sounds great.
"is anyone using a integrated with a opus21?"
Yes, I have the Opus 21 & S30 system. They both sound fantastic. I have the Great Northern Sound Company reference modded versions of each, but I did demo the stock versions of each. I'm using them with Avantgarde Duo Primo horns (107 db efficient). The Opus 21 S30 integrated system uses a DIN connection, where the units are stacked and connected on top of each other. No expensive interconnects and only one powercord. You can get an extra sources unit that stacks in the system that gives you connections for extra sources, a phonostage and FM radio. It is very conveneient and sounds great.