Processor input

Generally, the gain through the processor input of a preamp is fixed and used as a bypass.

Kal

At least it should be, but not on this one and not on my Arcam C30. Anyone with a manual or someone who knows where to find it?

The processor input is fixed at unity gain. This means that the loudness of a surround processor will be identical to what you would hear if you listened to its output directly. That is the whole purpose of a processor input. It is technically not a pass-thru in the sense that you are sending the signal through the active gain stages, just at a fixed attenuated level.

For this reason and a variety of others, I would not use the method you describe to compare the two preamps. The sound of the unit plugged into the REF3's processor input will be affected, sometimes for the good:]

Thank you! This was more information than I asked for, but most certanly apriciated. The posibilety of the REF 3 affecting the signal in the processor mode has crossed my mind too. Actually I have never heard my C30 perform so well before:-).