[cmjones01]

Good point. 'Warm white' LEDs are also available which have a much softer colour. They're also not so bright, which might actually be an advantage.

Another thought occurs to me: is this the set with a push-pull output stage? If so, how will it be biased? If it's not class A, isn't there a risk that the LEDs will brighten on loud passages as the HT current increases? This could be considered a feature...