You cannot avoid/bypass the LS60’s internal DAC implementation because of KEF’s terrible decision. Throwing a DAC/streamer inside a powered speaker’s cabinet is a terrible idea.
Get the Elac Navis ARF-51 by Andrew Jones, which is on killer closeout sale at the moment. It is sonically superior to the LS60 on all counts. Run a good external DAC+streamer to its analog input (no dacs or digital inputs on this speaker).