Perreaux Headphone Amplifier Silhouette SXH2 - Manual (Page 20)

19
I can hear a
hum coming
through my
headphones
Input and/or output sockets corroded
Check that the input and output RCA sockets on the rear of the
SXH2 are free from corrosion.
Interconnect cables damaged
Make sure that the integrity of your interconnect cables is sound
and they are firmly connected to your source and the SXH2.
SXH2 is close to external interference
Check the proximity of your SXH2 to any possible source of
EMI and/or RF interference, for example computers, televisions,
amplifiers, speakers, etc. Ideally the SXH2 should be placed as
close as possible to your source.
Earth loop in system
If your preamplifier and/or amplifier have an earth/ground lift
switch, toggle it and check which setting sounds better. The
signal ground of the SXH2 is isolated from earth by default, this
means that there needs to be a connection to earth elsewhere in
your system to alleviate hum.
The volume
control is at
maximum
and output
level too low
Gain setting too low
Toggle the gain configuration switch at the rear of the SXH2 UP
to the HIGH gain position. Make sure you turn down the volume
before changing this setting.
The volume
control is
too sensitive
Gain setting too high
Toggle the gain configuration switch at the rear of the SXH2
DOWN to the LOW gain position.