Specifications

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Sapphire
The Sapphire voicing combines the low-frequency boost and high-frequency attenuation
of Blue, but with the addition of additional very high-frequency emphasis above 10 kHz
for additional “air” and clarity. This voicing is especially suitable for high-quality audio
playback (without the need for supplemental equalization), and was the result of
feedback from a number of touring audio engineers.
Summary
The following figure illustrates all four previously-discussed voicings. The black response
is the “white” voicing. Blue, grey and sapphire are as they appear.