Monitoring the signal going into a non-grounded speaker?
"N_Cook" wrote in message
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Gareth Magennis wrote in message
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"N_Cook" wrote in message
...
Without differential scope amplifier/probe, audio out is missing
something
in the bass range about 70-80 Hz. Line-out signal faithfully follows
the
bass guitar input signal . Shure microphone, capable of those
frequencies,
monitoring the sound from the speaker, does not match the input at
those
sort of frequencies. But is it a failing of suspension or something of
the
speaker or some inductive/capacitive interaction with the amplifier
when
loaded with the speaker?
Not yet monitored the main rails to see if dipping on this bass amp.
I will then be subbing the speaker, as a test, but it still would not
determine whether an amp or a speaker problem , speaker is original to
the
combo. Any simple component to put in series or parallel with the
speaker
to
check if an output matching problem ?
Does this amp have a graphic equaliser? The line out may be pre graphic,
and one graphic fader may be faulty.
Gareth.
Volume , tone controls etc are in the DSP sextion and as line out is fine
,
I assume not a problem in that piece of magic.
Is this a Line 6?
Gareth.
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