I tend to agree with the link that Gregm provided over the definition that Stereophile presented. That is, brightness is an elevated output level in the treble region. According to Stereophile, they state that brightness and brilliance are the same thing. They go onto explain that these terms apply to the output levels and transient response between 4KHz and 8 KHz. Since transient response ( brilliance ) doesn't necessarily directly correlate with with average output levels ( tonal balance ), they are confusing two different terms down into one in this specific instance. Sean
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