The expectations about influence on sound reproduction from this very beautiful anniversary design (yet with all the previous classic elements preserved in the motor system) now had to be examined by the Ortofon Listening Panel. SPU 85 prototypes were made to be compared to SPU systems mounted in standard metal housing with the same motor system.
The Panel proclaimed: Very charming, open, dynamic, straightforward and present intermediate tone range between 200 and 1500 Hz typical for the SPU sound.
The wooden housing first of all seems to have strong influence especially in the range from say 4000 Hz and up, resulting in a very pleasant integration with intermediate frequency range compared to the metal housing. The musical integrity obviously tends to be improved by the lower Q for resonance in the wooden housing compared to the metal.