I owned an SP-6B, one of the more highly acclaimed of the
SP-6 series. I thought it was OK, but not spectacular. The
background noise level was too high, the bass ill-defined
and the highs rolled off. For its day it was excellent, but
many more current preamps are its better.
SP-6 series. I thought it was OK, but not spectacular. The
background noise level was too high, the bass ill-defined
and the highs rolled off. For its day it was excellent, but
many more current preamps are its better.