Eikon HPAMP4 User Manual page 4

4. ON: this LED is illuminated as soon as the unit is
connected to the power.
5. DC IN: this a USB type B connector to power your
HPAMP4, connecting here the supplied AC/DC adapter
you turn on the unit. Please note that is not a USB port
for data connection, but it accepts the 5V supply only, so
you can supply the HPAMP4 from almost any device
capable to deliver 500mA from its USB port. When
installing the product with the supplied AC/DC adapter,
ensure that the plug is easily accessible.
6. MONO/STEREO: this switch allows to hear on the
headphones the input signal as mono and it is useful
when the sound source is a mono signal.
7. MINI-JACK INPUT: 3.5mm stereo mini-JACK input.
8. JACK INPUT: 1/4" (6.3mm) stereo JACK input.
9. L & R RCA: standard RCA line inputs.
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