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Old 14th February 2013, 05:22 PM   #81
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The INT-30.5 version is the same power amplifier as the XA30.5, and it
appears that people are happy with it.

Note that the XA30.5, XA100.5, XA150.5 and XA250.5 all have the same
output stage circuit - they differ in the power supplies, heat sinking, and
the bias current of the amplifier. The performance differences are a function
of those things. Each idles at about the same temperature, and thus dissipates
the same wattage.

I favor the lower wattage Class A amplifiers into the more difficult loads,
as the higher bias current tends to sound better at ordinary levels.

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