The publicity is careful to say that the F-Series preamps feature on the device's inputs, with dual ADCs, and the accompanying picture shows the XLR inputs with the mic part not visible. So it seems likely that the attachments for the top have appropriate preamps and quite possibly single ADCs going by current trends. "The H5studio’s 3.0 capsule system* supports 32-bit float and gives creators more options to use the right mic for their recording." No mention of preamp quality nor number of ADCs. However, as the claim for the supplied mics is that they have a max SPL of 140dB, a minimum of 17dB SPL, and a dynamic range of 123dB, they shouldn't be any kind of disaster. They state that the original H5 had a dynamic range of 65dB, and that the H6essential offers 115dB.