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I believe that the quality of speaker, input and power cables affects the sound;
use good quality wire. I also believe there is a law of diminishing returns; one
could easily spend more on a set of interconnects than the cost of the entire
amplifier. Use your own judgment here.
It’s subjective and a matter of personal
taste.
If you’re into DIY there’s plenty of websites featuring homemade speaker
and interconnect cables you can try. That’s what I’ve done.
You can try differen
t ‘feet’ under the amp; some like the solid cones, some like
the squishy pods. The rubber feet provided will support the weight and isolate the
vibrations adequately. Cones will drain away vibrations into whatever the amp
rests upon, and squishy pods will keep vibrations from getting out but may help
damp them in the process.
I haven’t tried them. The power transformer and the
casework are internally damped and the cooling fan is attached with a soft rubber
isolation mount so there shouldn’t be much problem.
The amplifier is an unbalanced design and therefore a little more prone to
induced noise than the professional balanced units. A little hum from your
speakers is normal (you should hear almost no noise with the amp ‘on’ and input
cables unhooked). If you experience hum try dressing the input cables differently.
You will find that as you move them around behind the amp the hum level will go
up and down. It is an induced EMI (electromagnetic) field from the power
transformer that causes the hum. This is usually not a problem; a little
experimentation should reduce or eliminate the hum. If there is a nasty buzz
there may be a ground loop or an open ground between your preamp and the 66-
100. Check your input cables for continuity. The use of a high quality isolation
transformer is recommended to remove ground loops.
Do not float the AC ground on the 66-100 or any other
grounded component in your system in an attempt to isolate
the hum! This is a safety ground and is there to protect you if
there is a fault that could energize the chassis of the
component and cause electrocution.
Never run the amplifier without speakers connected! This
can destroy expensive output tubes and transformers!!
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