Jadis Defy 7 MkIV w/ KT 90's tweeks

Replace your transparent interconect. I have the same amp as you and had transparent ref cable. When i replaced it with kimber select 1030 it brought out missing detail and life espically in the vocals. Transparent has good bass but the mids and hight are somewhat dull. Also make sure you have 2 decated lines with 10 guage stranded wire going directly from your component to the fuse box with a decated (floting ground). This also helped alot (15-20%) improvement in my system. Good Luck, John

What Spectral preamp are you using ? I wonder-impedancewise-if Spectral/Defy is such a happy marriage, especially for the midrange, but then I may be wrong, I don't have the numbers available. I very much agree with 42659 about your Transparent interconnect. You could get in touch with the Cable Company, www.fatwyre.com, and get a Kimber, or a Spectral dedicated MIT ic for a home trial run. They are very helpful people, if you don't like the stuff, it will only cost you shipping, not more. Good Luck from me too!

OOps, Carey, I jsut realised this is an ancient thread! Should you stumble on it again, please let us know, how you solved the problem. Curious.

I had the "jEDI" amp too.. This is one of the better amps out there IMHO. Kudos to you.
I had best sound with Siltech FTM cable and I did use ESP power cord. I would like to suggest that you ged rid off Spectral and get CAT Signature MkIII or Ultimate.
This will do....Good luck

Holy mackerel,I got socks older than this thread. But I also got a Deffy 7 mk4. I got a cat3. I have heard a split down the middle on the kt90s, and this amp. I took my dealer's advice and went with the RM Labs 6550s I use Sy.Rea. ics and speaker wire. Active shielding box.A Top Gunn pc for the amp; a K.cobra. I also have what made "it" for me: the Custom Power Block. The 4 input front end only, device. This amp has large cjones ( sorry, wasn't a Spanish major)Everything listed,I added, one at a time/over a period of time. All made my 10Ts more alive/and More Alive.