Never heard that phrase before used in that context but salespeople say some strange things in audio. The Integra can act as pre-pro, and I'd not put something directly on top of an amp or receiver in any case due to ventilation needs. Processors do cost more than receivers, so perhaps that was his goal, to sell you something more expensive. Soundstage is something created primarily by the recording engineer and as played back on your speakers in your room; the electronics aren't particularly in play except perhaps some processing that can be different. Are you using the same speakers and room all along?
