The Volectric HPA V340 is a Headphone amplifier with 8 dB less noise than the V281, 2 x 15 Watt PSU, switchable between 115 and 230V, Gain factor 0 dB unbalanced, 6 dB balanced and Extended pre-gain settings via DIP switches: -18, -12, -6, 0, +6, +12, +18 dB, same for the line out. The Pre and post fader now work via the push of a button on the back and not via software control, Max output voltage (balanced output, both channels driven): 32 Volt = 1.8 Watts @ 600 Ohm and Maximum power (balanced output, both channels driven): 5 Watt @ 50 Ohm. 2 x 15 Watt PSU, switchable between 115 and 230V Gain factor 0 dB unbalanced, 6 dB balanced Extended pre-gain settings via DIP switches: -18, -12, -6, 0, +6, +12, +18 dB, same for the line out Pre and post fader now work via the push of a button on the back and not via software control