I have no idea whether this would be feasible; my gut feeling is that it would not work particularly well, particularly if you are using a fairly low output moving coil. I'm using the Aqvox with a Denon 103R (.25 mV output) into the balanced input and then balanced out to my integrated. In the balanced in/out configuration the Aqvox is supposed to be capable of its maximum gain, which is 75 db. I have the front gain controls set to about 2 db additional gain, which means I have about another 13 db to work with. In your scenario, I don't think it would be enough to gain and dynamics would suffer considerably running direct into a power amp.
I've owned the Aqvox since late November and one thing I didn't realize until quite recently is that the gain controls on the front of the unit are essential to really "dial in" the sound from the unit. The Aqvox literature that I received with my unit makes no mention of this, but it was detailed in a recent on-line review of the unit. The idea is to use those gain controls to lock in a setting which will give you the best performance. Too little and dynamics will suffer and too much and you will move things into an overload/distortion area. As it turns out, that 2 db setting for me would equate to about 62 db of gain with my 103R if Aqvox's numbers for maximum gain through balanced in/out are correct and that is just about dead on as far as what is required with the 103R. I can still run up to 12 o'clock on the volume control on my integrated with certain records, but am generally running around 9:30 to 10 o'clock with the majority of records.
By the way, how do like the Aqvox compared to the Linn Linto? I am curious.