The older Tannoys have loose, lumpy bass in comparison. But given your description, it sounds as something still may be amiss. Are you sure everything is wired correctly? Have you experimented with placement? How old is your amp, maybe it's in need of service, etc...
Have you tried connecting only the 707 to the D700's with the jumpers in place?
Do you think I've wired it incorrectly, preamp output is wired directly to top rung of speaker inputs and poweramp goes to bottom rung of speaker inputsCan you elaborate on this?
Have you tried connecting only the 707 to the D700's with the jumpers in place?