Our standard PVA Preamp has Copper/Nickel Electra-Print PVA transformers installed. Standard units have two outputs so that you can feed both your amp and sub-amp or headphone amp. We can build the PVA with 1 to 4 inputs, it’s your choice. Attenuator choices are either standard or stepped. The unit pictured here has three inputs. Built this way it costs $280, however prices depend upon components used. This passive preamp features a flat response curve at any attenuator position and works very will with an op-amp driving it.