Hi,
I read in manual on page 29.
EQUINOX 600 offers 3 single frequencies of 5 kHz, 10 kHz, 15 kHz in addition to Multi, giving a 3 times (×3) range or ratio from 5 kHz to 15 kHz, hence the 3F×3 technology designation.
EQUINOX 800 offers 5 single frequencies of 5 kHz, 10 kHz, 15 kHz, 20 kHz, and 40 kHz in addition to Multi, giving an expanded 8 times (×8) range or ratio from 5 kHz to 40 kHz
Unfortunately, It means, that this statement:
" However, both the Equinox 600 and Equinox 800 offer identical Multi-IQ modes covering the full frequency range. The Equinox 600 simply disallows direct access to the 20 khz and 40 kHz single frequency modes."
is not true. :(