Rich, how old are those Sansui speakers? I still have my set from about 1980... I think they're called S55-C's, big boxy three-ways with 12" woofers and an adjustable tweeter.
The SP-5500X were purchased in 1978, Yokouska, Japan. Paid $95.00 each. These too have a 12" woofer with 2, 4" mid woofers, horn tweeter and super tweeter. Considering their age and the miles they have traveled, the overall sound is rather good, but with a heavy dose of EQ. SPL level can be ear-bleeding. Enjoyed "Best of Sade" CD and my ears settled in quite nicely...and that is to say their output is not fatuiging as one might think.