Hi,
I rolled the svetlana 6550 and ei's kt90 on a pair of jadis Ja-30 before i changed to the Jadis se300b's.
I loved the 6550 over the kt90 although the lost of punch on the bass region. The mids and highs never sounded more sweet and relaxed. Since I´m using 93db on the low octaves the less power on bass wasn´t an issue. The great "BUT 2 here is that mids are made with a vintage jbl driver and horn and are very sensitive to "Harshness". I think in a regular dome midrange-high driver the kt90 maybe the best way to go.
I rolled the svetlana 6550 and ei's kt90 on a pair of jadis Ja-30 before i changed to the Jadis se300b's.
I loved the 6550 over the kt90 although the lost of punch on the bass region. The mids and highs never sounded more sweet and relaxed. Since I´m using 93db on the low octaves the less power on bass wasn´t an issue. The great "BUT 2 here is that mids are made with a vintage jbl driver and horn and are very sensitive to "Harshness". I think in a regular dome midrange-high driver the kt90 maybe the best way to go.