Are you asking if the ratio is appropriate? An output impedance of 330 ohms will drive just about anything. In addition, I recall the 4004 to be fairly sensative as well- I had a 2004mkii that I drove with tubes and even a passive.
As for the Quad 99- I currently use one and think it is the best preamp I have ever owned. The phono stage borders exceptional, it is 100% operational from the remote and has a ton of cool options- input sensativity, tilt, etc. The volume/balance controls are also very high performance.
It is also extremely transparent and refined. It has been a "off the merry-go-round" kind of unit for me and I played with some fairly heavy hitters before settling on it.
My only gripes are no xlr ins/outs (unless you make adapters for the ampbus), and only a single pair of rca preouts. I can deal with these as xlr outs are there if you really need them and the unit could easily drive 2 amps with y adapters off the preouts if needed.
good luck
