If the devil is in the details then iFi Audio named the iDSD Diablo aptly. The heights the proven platform that was Micro iDSD Signature gets taken to the rafters with its further optimised circuit and boutique parts overflowing from its red, race car chassis.
iFi's usual custom operational amplifiers show up here in a design that boasts more careful application of local negative feedback, rather than the more standard global variety. It's Headphonesty's "unique mix of raw, fire-breathing power and refined audio perfection in a no-frills portable package". [See Product Desc. For More]