Apogee audio interface better than a DAC?


I recently installed an Apogee One on my iMac so I could record guitar in Garage Band. Which it works well for. What I was surprised to find, however, is that now my studio monitors sound much better. (They were previously just plugged into the computer's stereo output jack.) In fact, out of curiosity I added Decibel to replace iTunes and man! I'm not certain, but the iMac/Apogee/Jamo system in some respects is superior to my Audio Research / NAD / Green Mountain Audio main system.
The computer system is very clear and revealing, which I guess a monitoring system is supposed to be. But it isn't off-putting or headache-inducing like I would expect. (Although I haven't sat there and listened for even a full hour, so maybe that's to come.)
Has anyone else noticed their relatively inexpensive home recording studio is a top-flight hi fi? I'm wondering how to use the Apogee in my stereo, but I don't think it's possible.
achilles
I'm not sending anything from the Mac to the Audio Research. They're two separate systems. I was trying to point out that the computer system was surprisingly good compared to the hi fi rig.
The Duet has two inputs. Alas, the One has, unsurprisingly, one. So I can't use it to record anything in stereo. However, it does output in stereo, so I could conceivably use it like a DAC, so long as the stream that feeds it is USB. Another mystery to unravel. I might be able to plug my iPod into the One's USB inputs and see if it will send a stereo output to the Audio Research amp. I'll have to try this sometime.
I'm glad you guys like your Duets. I'm pleased as punch with the One.
How are you sending the digital information to the Audio Research? Through the mac's optical digital out? If so are you using a old/cheap/too_long digital optical cable? Those can introduce quite a bit of jitter into a signal.

I've got the original firewire Duet that I use for a guitar interface and desktop/onthego listening. Awesome piece. I love it for the big circular volume control alone!

Best,
John.
I use an apogee USB duet two for recording and playback and my system sounds great. I record vinyl to my computer. Can record and playback up to 24/192. Works well with pure music.