There is really no other way to evaluate what effect the other system components have on the sound without the speakers. The system is built around the speakers for the most part. In the end you are matching to the speakers, more than solely evaluating the other gear.
It would be like evaluating a DVD player for movies without a Video monitor. Using good speaker matters as well. You would not use an old Black & White TV for the DVD demo.
It would be like evaluating a DVD player for movies without a Video monitor. Using good speaker matters as well. You would not use an old Black & White TV for the DVD demo.