SAM-A1 Owner’s Manual
FSL0132
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FSL0132 Version 5.1 © 2020 Fireworks Solutions Limited Page 21
Troubleshooting Continued
Symptom
Probable Cause
Solution
Sound is coming out of the
speakers but it is very quiet
Input signal too small
Check your audio source does not
have a level or output volume
control and ensure it is not set low.
Is your audio source compatible – is
it capable of delivering adequate
signal amplitude in to the SAM-A1
inputs? Check the specification of
your audio source against section
Volume control set too low
level
Have you turned up the volume
control to see if it makes any
difference?
Speakers not connected
properly
Check the speakers are connected
properly, both at the speaker
terminals/connectors and at the
amplifier, ensure the wire and not
the insulation is in the terminal post
if unterminated wires are used.
Speakers too high
impedance
Check the specification of your
speakers against section 3.1.3.
Perfectly acceptable volume ought
to be achievable with speakers in
the range 6 – 16 Ohms (but best
performance and power will be
achieved with the correct speaker
impedance of 8 Ohms). Your
speakers are not compatible if they
have an impedance outside of this
range
Sound is coming out of the
speakers full volume cannot
be achieved
Check the input signal is
greater than 350mVrms!
If you are using a personal stereo
or MP3 player e.g. phone as the
source, they are often limited to
less than 250mVrms to limit the
volume produced by headphones.
This can also affect the maximum
signal that can be produced by a
Bluetooth receiver.
Talk to us about fitting the 6N2P-EV
valves in the inputs V1 and V4.
Continuous or intermittent
audible hum from the
speakers when the volume
control is on minimum
Input Mains is too low for
the voltage selected inside
the unit.
Mains input needs to be correctly
selected inside the unit to match
your domestic mains supply
voltage– see section 3.1.1.
Contact FSL.
If the amplifier is working and you have been through the fault table above and you are not happy
with the sound quality then please contact us to see if we can help to resolve the issue.
