I'm going to disagree a little. I own a Concerto preamp and have owned both the Model 1 and 201 amps. In the case of the new products, which have been on the market for a while now, I think it is beyond shameful that users manuals do not ship with and are not available for them. Balance is controlled in a sort of odd way (actually, in a very poor way from a human factors standpoint) on the Concerto, but I had to write to JRDG to find out how. Ditto for setting the display to shut off.