I had the 919; I think the consensus was that it was better than later ones. The high frequencies were fine on the 919. The AU-X1 was even better but hard to find; I had one of those also. I had these at the same time I was a Krell dealer so had good amps to compare them with.
Best vintage Sansui integrated
Would like some feedback from those who have owned them. I am thinking of buying an Sansui AU-717 or 919 but wondered if people thought any of the later models like the AU-D11 (see below from the 'best of sansui' site)
"In 1980, the third generation of the 07 Series AU-D607F, AU-D707F, and AU-D907F were introduced in Japan. The international version equivalent to AU-D907F was AU-D11. Specification-wise, AU-D9 was more likely AU-D707F. The sound of those amplifiers was notably different from the previous Sansui amplifiers. Instead of very strong high frequency in the professional to AU-919 series, this generation of the 07 Series had very soft and natural high with the powerful low."
"In 1980, the third generation of the 07 Series AU-D607F, AU-D707F, and AU-D907F were introduced in Japan. The international version equivalent to AU-D907F was AU-D11. Specification-wise, AU-D9 was more likely AU-D707F. The sound of those amplifiers was notably different from the previous Sansui amplifiers. Instead of very strong high frequency in the professional to AU-919 series, this generation of the 07 Series had very soft and natural high with the powerful low."