The debate of the sonic superiority between valve and sonic state can be argued either way. At EKCO, we love the sound of valve amplification, yet we also realise that this can work differently from varying speakers, sound sources and music selections. For the EV55DP, you don’t have to choose, an output selection switch gives you the choice to change the output circuit to either the vacuum tubes or the solid-state IC amplifier, enabling you to suit your personal music taste and preference. On selecting the vacuum tube output, the vacuum tube front panel window will light up, in all its glory.