This item is very good quality, but you may need a "real" preamp to get to "Professional 1.4 Volts RMS". I will include suggestions below. The slam dunk, is a low cost mixer that will take whatever your Yamaha delivers--even a -20db signal and convert it to as high as +20 db [if needed]. I have a few of these Behringer mixers--Real Pro/Low Cost/Quiet. And they look cool!! They are available with 1/4" phone outs or 1/4" + XLR outputs. There is also stereo RCA inputs-1/4" phone and XLR inputs.